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Volkswagen Passat: 1995-1997 (B4) Passat 96 problem


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Last Post: Jun 22, 2018 6:13 AM Last Post By: play
kevinB4

Posts: 7
Registered: 02/22/04
Passat 96 problem
Posted: Mar 14, 2004 10:57 PM
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I just bought passat 96 gls, gasoline 2L, manual transmission.
Since I don’t know vehicle history, decided to do complete tune up.

At first OBD scan gave me:
P1582 Idle Adaptation at Limit
P0113 Intake Air Temp Circ High Input
P1013 Mass or Volume Air Flow Circ High Input

After purging DTC memory only P1582 came again, the other two were gone and did not show up even after repeated scans.

Another problem is that the car does not run smoothly (im my subjective feeling) at low (2000-2500) rpms even on second gear. Looks like fuel supply is not good?

Forum search gave me lots of info regarding P1582, but before starting any repairs it would be interesting to know other fellows opinions.

Also, could not find it in the repair manual: what is the idle speed? Mine is never going bellow 800-900rpm. Is that ok?

Regards,
Kevin.

JoeBean

Posts: 4,697
Registered: 02/14/02
Re: Passat 96 problem
Posted: Mar 15, 2004 7:12 AM   in response to: kevinB4 in response to: kevinB4
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800-880 RPM is the idle spec. It is not adjustable. The power issue is likely connected to the codes. Check for vacuum leaks, which is a common cause of P1582. Also exhaust leaks, particularly before the oxygen sensors. Other, less common problems to check re: P1582 is the fuel pressure, throttle valve control module, EVAP canister purge regulator valve, and the MAF.

Terry
kevinB4

Posts: 7
Registered: 02/22/04
Re: Passat 96 problem
Posted: Mar 16, 2004 5:08 PM   in response to: JoeBean in response to: JoeBean
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Thank you for your comments. I'll check everething as soon as snow storm is over.
kevinB4

Posts: 7
Registered: 02/22/04
Re: Passat 96 problem
Posted: Apr 3, 2004 6:49 PM   in response to: kevinB4 in response to: kevinB4
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Visual inspection did not reveal any problems with vacuum hoses. But big plastic box where air filter is placed has cracked and there is a small hole on its side. Could it be the source of the problem?

Regards,
Kevin.
JoeBean

Posts: 4,697
Registered: 02/14/02
Re: Passat 96 problem
Posted: Apr 4, 2004 9:15 AM   in response to: kevinB4 in response to: kevinB4
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Try using aluminum duct tape over the crack to see if that helps things. Depending on where the crack is it may be allowing unmetered air in, that is, air after the MAF sensor. That's what you're looking for - air leaks after the MAF sensor.

Terry
kevinB4

Posts: 7
Registered: 02/22/04
Re: Passat 96 problem
Posted: Apr 20, 2004 7:28 PM   in response to: JoeBean in response to: JoeBean
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It seams that small amount of oil from PCV valve getting to MAF sensor through the intake air duct. I have sealed off crack on air filter casing and wiped oil off MAF sensor’s surface, cleared OBD memory. It fixed the problem but only for couple of days. Now scan tool gives me the same code P1582 – Idle Adaptation at Limit. Could oil on MAF sensor surface be the problem? Also, each time after battery has been unplugged for a while, idle speed becomes unstable for some time, and during that time air filter element gets wet. It looks like humid air flow coming from the secondary air injection system. Is it ok?

Regards,
KA.
kevinB4

Posts: 7
Registered: 02/22/04
Re: Passat 96 problem
Posted: May 9, 2004 2:33 PM   in response to: kevinB4 in response to: kevinB4
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It been couple of days since I have cleared OBD memory, but Catalyst, Evaporative System and Oxygen Sensor Monitors could not generate readiness code yet. I going to take my car to local dealership for diagnostics. Latter I will post results here.
kevinB4

Posts: 7
Registered: 02/22/04
Re: Passat 96 problem
Posted: May 9, 2004 9:27 PM   in response to: kevinB4 in response to: kevinB4
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Many people on this forum suggest that cleaning throttle body an MAF sensor can help eliminate P1582 code. What is the best way to lean dirty MAF sensor? It is quit expensive and I defiantly do not want to damage it.

Thanks,
KA.
kevinB4

Posts: 7
Registered: 02/22/04
Re: Passat 96 problem
Posted: May 9, 2004 9:50 PM   in response to: kevinB4 in response to: kevinB4
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I heard that after disconnecting battery or replacing throttle “basic setting” should performed. Could it be the problem?

Thanks,
KA.
Tiger Gwynne

Posts: 15
Registered: 12/09/03
Re: Passat 96 problem
Posted: Jun 4, 2004 6:47 PM   in response to: kevinB4 in response to: kevinB4
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Let me tell you a story. It involves cleaning of the throttle body, but it does relate to your MAF sensor. I own the VR6 version. I've cleaned throttle bodies on BMW's with very good results. On this occasion, due to the intake air hose and PCV tubing all being joined, in my haste, I managed to break away the purge valve from it's attached hose. No big deal I thought, what can a PCV hose cost?! I went to the dealer, and to my shock and horror, they don't stock the PCV hose, just the entire assembly, from air cleaner to throttle body, including the PCV hose and sensor. Cost:$250. Outrageous, I said. Went to a VW wrecker in the area thinking I might find one cheap. He's no dummy, as he showed me several cars in his lot, all of them with the same broken piece. He had one stashed away, in fine condition. Price? $100. I shook my head. Supply and demand, I suppose. It would appear, after speaking to several mechanics, that these hoses are common weak points. What I can't believe is that VW won't stock them, given that they are a clamped item that is not integral to the intake hose, and they are a common failure piece.
play

Posts: 13
Registered: 12/04/17
Re: Passat 96 problem
Posted: Jun 22, 2018 6:13 AM   in response to: kevinB4 in response to: kevinB4
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