2003 Audi A4 1.8t Heat Not Working Free Updated
2003 Audi A4 1.8t Heat Not Working Free Updated
08-13-200912:23 PM #1
Registered Fellow member Two Rings
HELP!! 2003 Audi A4 i.8t misfire trouble.
Last edited by myrick26; 08-13-2009 at 12:thirty PM.
08-13-200912:38 PM #2
Established Member Two Rings 
Re: HELP!! 2003 Audi A4 1.8t misfire problem.
Check your ability output stage on summit of your air box. Unplug it and see if it makes a deviation.
08-13-200912:42 PM #iii
Registered Member 2 Rings
Re: Help!! 2003 Audi A4 one.8t misfire trouble.
My motorcar is a 2003, I dont have the ability output stage, or if I do its not in that location. Thanks though
08-13-200907:04 PM #4
Registered Fellow member Two Rings
Re: HELP!! 2003 Audi A4 i.8t misfire problem.
08-13-200908:52 PM #v
Veteran Member Four Rings 
Re: Aid!! 2003 Audi A4 1.8t misfire trouble.
MAF on the way out.. or Coolant temp sensor.. The car ignores some of the imputs when information technology is in open up loop (warm up) and then when it goes into closed loop it starts to misfire is my gauge. could be master 02 sensors as well. I would outset by checking if you lot have the updated coolant temp sensor.. its green. If not I would showtime with that considering its cheap. A bad CTS could crusade the engine to run rich and that may be why your true cat got taken out.
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08-16-2009xi:20 PM #6
Veteran Member 4 Rings
Re: HELP!! 2003 Audi A4 one.8t misfire problem.
y'all get this figured out OP.
- Caractere - Bulletin board system - Kamei - 034 - Stasis - Hotchkis - Stern - Forge - Apikol - Revo - Podi - RNSE - Bi-Xenon - Door Blades -
If your gunna do information technology.. Exercise It right!
08-17-200901:48 AM #vii
Veteran Fellow member Four Rings 
Re: Assistance!! 2003 Audi A4 i.8t misfire problem.
Originally Posted past myrick26 
My car is a 2003, I dont have the ability output stage, or if I do its not in that location. Thanks though
Right, each coilpack has it's ain internal power output stage. A loud sucking audio when the engine in warmed upwardly, is probably a vac leak in a hose nether the intake manifold that is split and the split opens upward as it heats up and the hose softens from the heat. Information technology could likewise exist a leak in the intake manifold gasket near the #ii intake runner, that opens up when the engine is hot. What does the spark plug for cylinder 2 await like compared to the others? I bet it indicates a lean status in cylinder 2, causing the misfires on that cylinder. The only mode the ECU recognizes misfires, is past the momentary dip in crankshaft angular velocity occurring when cylinder 2 is supposed to exist providing a torque impulse to the crankshaft. A lean misfire at that indicate in the rotation of the crank, where a speed dip occurs instead of the expected dispatch, is recorded as a misfire. The fact that the misfires developed afterward replacing the cat is only a coincidence.
Last edited by diagnosticator; 08-17-2009 at 01:56 AM.
08-17-200903:20 PM #8
Registered Fellow member Two Rings
Re: Help!! 2003 Audi A4 i.8t misfire trouble.
Ok so I read on some post information technology could have somthing to exercise with the EGR valve, then I took information technology off and sprayed some carb cleaner in it and and tried to clean it. So after I put information technology back on I have not had the problem, weird I know. Does this brand sense to anyone?? The cyl. 2 spark plug looks the same. The sucking sound sounded more than like the little blower motor (non certain what it is called) at the front lesser right of the engine. Is there a time when you should change the MAF even if it seems to be working right?? my machine does have 94000 miles on it. any other matter I maigh twant to change? Thank you for all the help everyone!!!
08-17-200909:32 PM #nine
Veteran Member Iv Rings
Re: Help!! 2003 Audi A4 1.8t misfire problem.
Originally Posted by myrick26
Ok so I read on some mail service it could have somthing to do with the EGR valve, so I took it off and sprayed some carb cleaner in it and and tried to clean it. Then after I put information technology back on I take not had the trouble, weird I know. Does this brand sense to anyone?? The cyl. 2 spark plug looks the same. The sucking sound sounded more than like the picayune blower motor (not certain what it is called) at the front end lesser right of the engine. Is there a time when y'all should change the MAF fifty-fifty if it seems to be working correct?? my car does have 94000 miles on it. any other thing I maigh twant to change? Thanks for all the help everyone!!!
It doesn't brand sense because our cars don't have an EGR valve. The blower runs but for about a miniute after cold start up, to oestrus upwards the cat rapidly. There is no replacment interval for the MAF meter, if it works, cleaning the meter can help accuracy, but that is all.
08-18-200902:38 AM #x
Senior Member Three Rings
Re: Aid!! 2003 Audi A4 1.8t misfire problem.
Originally Posted by myrick26
Ok so I read on some post it could have somthing to do with the EGR valve, and so I took it off and sprayed some carb cleaner in it and and tried to clean information technology. So after I put it dorsum on I accept not had the problem, weird I know. Does this make sense to anyone?? The cyl. 2 spark plug looks the same. The sucking sound sounded more similar the little blower motor (not sure what it is called) at the front bottom right of the engine. Is in that location a time when yous should modify the MAF even if information technology seems to be working right?? my car does have 94000 miles on it. any other thing I maigh twant to change? Thank you for all the aid anybody!!!
If you lot heard that racket when yous beginning start the machine it'southward secondary air pump
08-19-200912:46 AM #xi
Registered Member 2 Rings
Re: Help!! 2003 Audi A4 ane.8t misfire problem.
and then today it did it once more , this time information technology took much longer and only seemed to happen at lower speeds and at idle. too it threw codes p0300 ,p0301, 0302,0303,0304. this is after i cleanedthe MAF. im starting to feel hopless. any ideas?
08-xix-200905:32 PM #12
Veteran Member Four Rings
Re: Help!! 2003 Audi A4 1.8t misfire problem.
Originally Posted by myrick26
so today information technology did information technology again , this time information technology took much longer and only seemed to happen at lower speeds and at idle. besides information technology threw codes p0300 ,p0301, 0302,0303,0304. this is later on i cleanedthe MAF. im starting to experience hopless. any ideas?
Are the misfires causing vibration or rough running when they happen? Check the fuel pressure at the fuel rail. As I explained before, the OBD 2 fault diagnostics can't determine whats causing the misfires, only that they are occurring. Therefore your troubleshooting procedure involves checking everything in a systematic style that can cause misfires. Make a list of known factors that could be involved with the misfires and check and eliminate each possibility until something is constitute that is off spec. That involves fueling first, then mechanical stuff second. The possibility that it's either a vacuum leak or low fuel force per unit area is my first estimate here, given the current knowns.
Last edited past diagnosticator; 08-nineteen-2009 at 05:46 PM.
08-19-2009ten:53 PM #13
Registered Member Two Rings
Re: Help!! 2003 Audi A4 1.8t misfire problem.
When my cat broke and clogged the frazzle pipe could the pressure have broke the egr/combi valve? After reading many threads online and the wiki board information technology seams like a likely culprit.
08-twenty-200912:08 AM #14
Veteran Member Four Rings
Re: HELP!! 2003 Audi A4 1.8t misfire problem.
i don't think so. There is no error lawmaking indicating a trouble with the SAI Combi valve or arrangement function. Information technology's possible for the diaphragm in the SAI Combi valve to be ripped, and admitting outside air into the vacuum organisation when the SAI arrangement is supposed to exist active, just afterwards a common cold start up, just so the Combi valve would non be responding and the OBD system should set a mistake code for incorrect flow of the SAI organization. Y'all can test the SAI Combi valve past applying vacuum with a hand vacuum pump and if the valve doesn't hold the vacuum applied then the valve is bad, just I don't think that is the instance hither. If the diaphragm is leaking in the SAI valve, that could admit enough false air to cause lean misfires when the valve is supposed to exist activated or open after a cold start. Since in that location is no error code for the SAI system incorrect flow detected, I believe the fault volition be institute elsewhere.
Terminal edited past diagnosticator; 08-20-2009 at 12:29 AM.
08-20-200903:03 AM #15
Senior Member Three Rings
Re: Help!! 2003 Audi A4 1.8t misfire problem.
Okay at present all the cylinder is missing??? Do me a favor try this method out, Start you vehicle and let it idle and try to open the oil cap off while the engine is running. If information technology's stuck or really difficult to get it off almost likely one of your check valve or PCV is failing. I ran into this trouble before and at a dealer information technology's chosen sludge issue.
08-20-200903:38 PM #16
Registered Member Two Rings
Re: HELP!! 2003 Audi A4 i.8t misfire problem.
Its random, usually only happening at idle after beingness warmed upwardly. The oil cap was like shooting fish in a barrel to take off with the automobile running subsequently it was warmed upwardly. I have simply used synthetic mobile one or castrol when doing oil changes. could this however crusade sludge? its merely doing this later coming to a stop and sitting for a infinitesimal at idle. commonly if I turn the car off and restart it is goes abroad for a while. When I floor the gas the cat does thave whatever lag or hesitation either.
I noticed today that the check valve by the coolant temp sensor was crevice and broke in 2 when I was checking the lines once more. Could this cause the problem? I thought it would throw different codes, this check valve cracked on me earlier and only caused surging. I am going to try and get a new one tomorrow, hope information technology solves the problem.
Terminal edited by myrick26; 08-20-2009 at 10:56 PM. Reason: institute somthing! hope it is the problem.
08-21-200901:eighteen AM #17
Senior Member Three Rings
Re: Assistance!! 2003 Audi A4 1.8t misfire problem.
Originally Posted by myrick26
Its random, ordinarily only happening at idle subsequently being warmed upwards. The oil cap was easy to take off with the machine running after it was warmed up. I take only used synthetic mobile i or castrol when doing oil changes. could this withal cause sludge? its simply doing this later coming to a stop and sitting for a minute at idle. normally if I plough the auto off and restart it is goes away for a while. When I floor the gas the true cat does thave any lag or hesitation either.
I noticed today that the check valve past the coolant temp sensor was scissure and broke in two when I was checking the lines again. Could this cause the problem? I thought it would throw different codes, this bank check valve croaky on me before and only caused surging. I am going to effort and go a new one tomorrow, promise it solves the trouble.
That could exist it, let u.s. know after you supercede it
08-21-200906:08 AM #18
Established Member Ii Rings 
Re: Assistance!! 2003 Audi A4 1.8t misfire problem.
Its the coilpacks I just had to practise all 4 brand sure U go the new R coilpacks
2003 Audi 1.8T A4
08-22-200904:35 PM #nineteen
Registered Fellow member 2 Rings
Re: Help!! 2003 Audi A4 1.8t misfire problem.
I fixed the check valve and still accept the same problem. I updated my coils packs near 8 months ago with the sti R version. This problem is actually random is why I am pretty sure its not the coil packs. It happens at low RPMS and at idle about of the time, once I become going it doesnt happen. where is the pcv valve on my automobile??
08-23-200902:09 PM #20
Registered Member 1 Ring
Re: HELP!! 2003 Audi A4 one.8t misfire problem.
Hello all. I am new to the forum. I was researching this verbal issue with my 2003 A4 i.8T.
A little groundwork on the result. The whole matter got started under worse conditions with a seized water pump breaking the timing belt and tearing up the cylinder head. The car has 60K miles on information technology and prior to this everything worked fine. Afterwards those repairs were completed (I'll spare you the long arduous story well-nigh how long this took) the car drove drove to the office then home fine. The next day, by the time I got out of the driveway the engine was bucking and so hard I had to stop before the engine concluded up in my lap. I had the car towed dorsum to Audi.
Second repair go round they checked everything, fuel, ignition coils, replaced plugs, and eventually replaced the cylinder head (over again). Again I'll spare y'all how long information technology took them to fix it but at least this fourth dimension I got to bulldoze a brand new courtesy 2009 A4 Quattro around for 6 weeks (oops I let it skid).
Once I got my A4 back I had a vapor lock in the brakes and near had a wreck cause I couldn't terminate. I was however able to get that cleared and the brakes piece of work normally once more. Then everything worked fine for about four days (60 miles driven or so) until the engine started having misfires. I am also recording P0301 misfires with OBDII. Only it seems to vary, sometimes it is cylinder one sometimes three and sometime I become the blinking check engine light but no lawmaking gets recorded to pull.
Subsequently much reading online I feel it is a vacuum leak, merely I have no idea where to get-go on checking the hoses for possible replacement. I don't have much confidence in the Audi dealership's garage at this point either, since I seem to have the same trouble over and over again without information technology beingness solved. Although they did aid with the restriction issue over the phone.
The only other thing I might mention, although I recollect it is unrelated, is that for the past year the automobile won't e'er start on the outset try about l% of the time I have to turn the ignition 2 or iii times to continue the automobile started. It ever fires and starts for a moment, information technology merely seems to die within 1 - 3 seconds then I accept to start it again, sometimes twice. I have replaced the bombardment within the last year and that isn't related.
I know I am not helping solve the question posted on this thread, only thought that presenting my case my further an answer for both of united states of america. Thank you.
Last edited by opherko; 08-23-2009 at 02:fourteen PM.
08-24-200904:19 PM #21
Registered Fellow member Two Rings
Re: Aid!! 2003 Audi A4 1.8t misfire trouble.
That actually doesnt help me.
08-24-200911:36 PM #22
Veteran Fellow member 4 Rings 
Re: Help!! 2003 Audi A4 one.8t misfire trouble.
Originally Posted by myrick26
I fixed the cheque valve and however accept the same problem. I updated my coils packs most eight months ago with the sti R version. This problem is really random is why I am pretty sure its not the scroll packs. Information technology happens at low RPMS and at idle almost of the fourth dimension, once I get going it doesnt happen. where is the pcv valve on my car??
From what i've heard.. sti coilpacks are pretty shitty.
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Das Build Thread Performance parts for sale: MagnaFlow Race Muffler - Vibrant 4" Filter - MAF iv" Housing
08-24-2009xi:43 PM #23
Registered Member Two Rings
Re: HELP!! 2003 Audi A4 one.8t misfire problem.
bu the misfire doesnt follow the coilpack and it is very random.
08-26-200911:03 PM #24
Registered Fellow member Two Rings
Re: HELP!! 2003 Audi A4 i.8t misfire problem.
Why would a vacuum leak cause a very random problem. Past random I mean it happens randomly.
08-27-200907:27 AM #25
Veteran Member Four Rings
Re: Help!! 2003 Audi A4 one.8t misfire problem.
Originally Posted by myrick26
Why would a vacuum leak crusade a very random problem. By random I hateful it happens randomly.
Because the vacuum leak is random? Just a thought. The other attribute of the symptoms is that it doesn't happen with a cold engine, requiring ~ 1O miniutes of warm upwardly fourth dimension for the symtoms to occur once again, right? If that is still true, then that is a clue every bit to what is at the source of the consequence.
08-27-200909:04 AM #26
Registered Member 1 Ring
Re: HELP!! 2003 Audi A4 i.8t misfire problem.
Had to have mine back to Audi. The coilpack is bad even though they were all tested 2 weeks ago past the dealer. Should get the car back today.
I am no expert, just if it random and doesn't follow coilpacks then it is likely something else.
08-27-2009xi:55 AM #27
Registered Fellow member 2 Rings
Re: Aid!! 2003 Audi A4 1.8t misfire problem.
Car wouldnt even start today? hopefully information technology will throw some new lawmaking when I check it. The check valve that is attached to thesmaller hose coming out of the vavle cover in the back had some oil on the side going away from the engine, is this normal?? if not the hose continious down to some other hose and so to higher up where the oil filter screws in, could something be messed upwardly at that place causing a vacuum leak?? Thanks for all the assist everyone has given me!! Im going to do a leak test this weekend merely am affriad the leak might be internal and I wont hear anything.
08-28-200912:40 PM #28
Registered Member Two Rings
Re: Assist!! 2003 Audi A4 1.8t misfire trouble.
Then i did the leak pressure test and establish ane very pocket-sized leak. This did not solve the problem though. There was near a eye beat sound coming from the oil poor area similar air was being leaked into the oil of the engine, is this ok?
Last edited past myrick26; 09-06-2009 at 03:29 PM.
09-ten-200907:21 AM #29
Registered Fellow member One Band
Re: Assist!! 2003 Audi A4 one.8t misfire problem.
I take an 03 avant quattro ane.8t and am troubleshooting the same problem right now and going nuts.... the only code i go so far is p0302 i replaced the coil pack on cylinder 2 and checked the spark plugs the misfiring still occurs but not as bad... there was a sabbatical hose that had a crack i replaced also...... does anyone think our problem has to exercise with fuel injectors? (when i am looking at my engine the 3rd one from the forepart has some residue effectually it) also about 2 months ago my turbo went and i replaced it with a k04 turbo but did naught else (the reason for that was the audi dealership wanted over $3,000 and the upgrade but cost me around $1000.... would the turbo cause this? i am about to go bank check the codes again requite u an update when i become back.... also could it be a unlike coil pack than cylinder 2 if the lawmaking is p0302....
Final edited by GreezyG; 09-ten-2009 at 07:27 AM.
09-10-200908:57 AM #30
Registered User Four Rings 
Re: Assistance!! 2003 Audi A4 1.8t misfire problem.
Originally Posted by GreezyG
I take an 03 avant quattro one.8t and am troubleshooting the aforementioned trouble right now and going basics.... the merely lawmaking i get so far is p0302 i replaced the whorl pack on cylinder ii and checked the spark plugs the misfiring even so occurs but not equally bad... at that place was a breather hose that had a crack i replaced too...... does anyone think our problem has to do with fuel injectors? (when i am looking at my engine the 3rd ane from the forepart has some residual around it) also most 2 months ago my turbo went and i replaced it with a k04 turbo but did nothing else (the reason for that was the audi dealership wanted over $three,000 and the upgrade simply price me around $1000.... would the turbo crusade this? i am about to become check the codes again requite u an update when i get back.... also could it exist a different coil pack than cylinder 2 if the code is p0302....
You should try replacing all 4 coils at 1 time. Don't simply supersede the bad one.
At that place's extra stress placed on the others when ONE goes bad. And then information technology's likely your misfiring is from the other coils being overworked.
Supervene upon all four, and then keep the 'newish' i in your trunk as a spare.
Next time one goes out, put in your spare to go you to the dealership, then replace all iv once again; it'southward best practices.
09-17-200910:45 PM #31
Senior Member 3 Rings 
Re: HELP!! 2003 Audi A4 i.8t misfire problem.
I got similar problem. Motorcar runs fine and misfires only when I terminate at a traffic calorie-free. Checked coils, injectors, plugs. Adjacent step is vacuum leaks. Also, tin a coolant temperature sensor cause a misfire?
09-eighteen-200905:12 AM #32
Veteran Member Four Rings
Re: HELP!! 2003 Audi A4 1.8t misfire problem.
Originally Posted by MOLDOVANOS
I got similar trouble. Automobile runs fine and misfires merely when I finish at a traffic low-cal. Checked coils, injectors, plugs. Side by side step is vacuum leaks. Also, can a coolant temperature sensor cause a misfire?
How do you know it's just misfiring at cease lights, past experience only or confirmed by logging with VAG-COM?
09-18-200905:14 AM #33
Veteran Member Four Rings
Re: Assist!! 2003 Audi A4 one.8t misfire problem.
Originally Posted by myrick26
So i did the leak pressure exam and plant one very pocket-size leak. This did non solve the problem though. There was virtually a heart crush sound coming from the oil poor surface area like air was being leaked into the oil of the engine, is this ok?
No, the oil fill cap must seal tightly, supervene upon the cap gasket as needed.
09-eighteen-200905:21 AM #34
Veteran Fellow member Four Rings
Re: HELP!! 2003 Audi A4 1.8t misfire problem.
Originally Posted past opherko
Howdy all. I am new to the forum. I was researching this exact effect with my 2003 A4 ane.8T.
A little background on the issue. The whole affair got started under worse atmospheric condition with a seized water pump breaking the timing chugalug and tearing upwardly the cylinder caput. The car has 60K miles on it and prior to this everything worked fine. After those repairs were completed (I'll spare you the long arduous story about how long this took) the car collection drove to the office then habitation fine. The side by side mean solar day, by the time I got out of the driveway the engine was bucking so hard I had to stop earlier the engine ended up in my lap. I had the auto towed dorsum to Audi.
Second repair become round they checked everything, fuel, ignition coils, replaced plugs, and eventually replaced the cylinder caput (once again). Again I'll spare you lot how long it took them to fix it but at least this time I got to bulldoze a brand new courtesy 2009 A4 Quattro effectually for 6 weeks (oops I permit it sideslip).
One time I got my A4 dorsum I had a vapor lock in the brakes and almost had a wreck cause I couldn't stop. I was however able to become that cleared and the brakes work normally again. And so everything worked fine for nigh 4 days (threescore miles driven or so) until the engine started having misfires. I am also recording P0301 misfires with OBDII. But it seems to vary, sometimes it is cylinder one sometimes three and one-time I become the blinking bank check engine lite only no code gets recorded to pull.
After much reading online I feel information technology is a vacuum leak, only I take no idea where to start on checking the hoses for possible replacement. I don't have much confidence in the Audi dealership's garage at this signal either, since I seem to have the same problem over and over once more without it being solved. Although they did assistance with the brake issue over the phone.
The only other thing I might mention, although I recall it is unrelated, is that for the by twelvemonth the machine won't ever outset on the first try nigh 50% of the time I take to plow the ignition 2 or iii times to proceed the automobile started. It always fires and starts for a moment, it just seems to die within ane - three seconds then I have to start it once more, sometimes twice. I have replaced the battery within the last year and that isn't related.
I know I am not helping solve the question posted on this thread, only thought that presenting my case my farther an answer for both of us. Thanks.
Have the fuel pressure checked. The '03'southward had a fuel pump call up, practice you know if your A4 had the fuel pump replaced under the recall or not?
09-eighteen-200905:25 AM #35
Veteran Fellow member Four Rings
Re: Assistance!! 2003 Audi A4 1.8t misfire problem.
Originally Posted by myrick26
Machine wouldnt even get-go today? hopefully it will throw some new code when I check information technology. The check valve that is attached to thesmaller hose coming out of the vavle encompass in the back had some oil on the side going away from the engine, is this normal?? if non the hose continious down to another hose and then to above where the oil filter screws in, could something be messed up there causing a vacuum leak?? Thanks for all the help anybody has given me!! Im going to exercise a leak examination this weekend but am affriad the leak might be internal and I wont hear anything.
At that place should not be any oil visable leaking from anything on the engine, if there is, then the leak must exist fixed.
09-18-200905:xxx AM #36
Veteran Member Four Rings
Re: HELP!! 2003 Audi A4 i.8t misfire trouble.
Originally Posted past myrick26
I fixed the check valve and still take the same problem. I updated my coils packs about 8 months ago with the sti R version. This problem is really random is why I am pretty certain its not the roll packs. It happens at low RPMS and at idle most of the time, one time I get going it doesnt happen. where is the pcv valve on my auto??
The "PCV" vavle is located in the pinnacle of the oil filter/block ventilation base casting under the intake manifold.
The common factor with random multiple cylinder misfires is the fuel/air ratio. If too lean, so there will exist random lean misfires. What are the fuel trim values in the measuring blocks with VAG-COM?
09-18-200908:06 AM #37
Senior Member 3 Rings
Re: Help!! 2003 Audi A4 ane.8t misfire problem.
Originally Posted by diagnosticator
How do y'all know information technology's simply misfiring at stop lights, past feel but or confirmed by logging with VAG-COM?
I drove around with Vag-com to see live data and I can feel misfire likewise.
09-18-200908:forty AM #38
Veteran Fellow member Four Rings
Re: HELP!! 2003 Audi A4 1.8t misfire trouble.
Originally Posted by MOLDOVANOS
I drove around with Vag-com to see live data and I can experience misfire as well.
Cheque the fuel trims in the measuring blocks. For idle misfires, there will be "Additive" (idle) fuel trim of a large value, probably exceeding the allowed +/- 25 percent fuel trim limit. At that place will probably be Multiplicative (above idle load/speeds) fuel trim also, merely below the maximum 25 percent trim limit.
09-18-200909:17 AM #39
Senior Member 3 Rings
Re: HELP!! 2003 Audi A4 1.8t misfire problem.
Originally Posted by diagnosticator
Check the fuel trims in the measuring blocks. For idle misfires, there will be "Condiment" (idle) fuel trim of a big value, probably exceeding the allowed +/- 25 percentage fuel trim limit. There volition probably be Multiplicative (above idle load/speeds) fuel trim likewise, but beneath the maximum 25 percent trim limit.
How do I fix that problem?
09-xviii-200909:35 AM #40
Established Member Two Rings 
Re: Assistance!! 2003 Audi A4 one.8t misfire problem.
sounds like what yous need to do is the same matter i only did... disconnect the unabridged vac arrangement from the crank breather coming out of the cake to the valve comprehend vent, all the manner to the turbo intake pipage. This freaking thing is a picayune pain in the donkey to remove but you demand to practice this and quit wasting time worrying about this besides as giving basically no guidance in this tread thats very relavent.
A visual bank check isn't going to do much if you have an valve thats bad. When you have this hose section off, you'll first accept the chance to run into if at that place are any cracks which you lot're not able to run across visually through the intake manifold runners. Then you tin check function and brand sure that the valves are working properly... yous should take a wait at my thread hither and wait at the diagrams to figure out what to do... quite helpful - helped me fix my outcome concluding night.
http://world wide web.audizine.com/forum/showthread.php?t=311117
besides why don't you detect someone with another Mass air flow sensor you can just bandy quick and try in your vehicle??
Current: 03 A4 1.8MTQ STG 1plus + 335i E93 convertible 390hp + 328xi E92 + Seadoo RXP x2 + Seadoo Speedster 430
Past: 05 A4 Cabriolet one.8T**98 A4 Avant**97 A8 4.2Q**01 S4**94 90CSQ**93 90**92 100**88 80**87 5000T
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