Car idles for a few minutes then dies.
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Audiworld Junior Member
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Car idles for a few minutes then dies.
So my car will idle for around 5 min then randomly die. It always immediately starts right back up. Runs the same with with the IAC plugged in and without it plugged in. Any guesses?
AudiWorld Senior Member
Joined: Jul 2013
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You need to pull the fault code(s) with a VAG-COM or try a local parts store that will read OBC-2 fault codes for you for free. (most will do it free here in the USA) The OBC-2 readers may or may not be able to tell you the problem..but it is worth a try.
Your problem could be many things, a ignition switch failing..a plugged up fuel filter..a dying fuel pump..a bad electrical connector..the list goes on. Having a VCDS VAG-COM fault code helps.
If I were to guess...the ignition switch would be first..easy enough to change and get an OEM switch from the dealer...the camshaft sensor can cause this problem..the plug connector can break and hang loose and the sensor itself can become faulty..the same deal with the crankshaft sensor. quattroworld.com Forums: C4 no start
If you suspect the cam sensor (a likely suspect) you can get a new one from Hans for $16..I'm running one in my A6 now without issues.
078905161C $16 VW Audi Camshaft Position Sensor 80/90 100 A4 A6/S6 Cabriolet V6
Your problem could be many things, a ignition switch failing..a plugged up fuel filter..a dying fuel pump..a bad electrical connector..the list goes on. Having a VCDS VAG-COM fault code helps.
If I were to guess...the ignition switch would be first..easy enough to change and get an OEM switch from the dealer...the camshaft sensor can cause this problem..the plug connector can break and hang loose and the sensor itself can become faulty..the same deal with the crankshaft sensor. quattroworld.com Forums: C4 no start
If you suspect the cam sensor (a likely suspect) you can get a new one from Hans for $16..I'm running one in my A6 now without issues.
078905161C $16 VW Audi Camshaft Position Sensor 80/90 100 A4 A6/S6 Cabriolet V6
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Okay, so I yanked the MAF plug while the car was running and immediately dies. Odd thing is that if I start the car again with the MAF unplugged the car will idle for days. Does that mean the MAF is the issue?
AudiWorld Senior Member
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Can't really say. The engine computer will go into a fail safe mode if the MAF is disconnected when starting and operate on some standard programming without any impute from the MAF. Might be a bad MAF..or air leaks between the MAF and the intake manifold or vacuum lines.
Is the check engine light on..should be with the MAF disconnected..check and clear the codes..then see what codes come up. If you have a bad MAF..it should throw a code stored in th OBC-2
Is the check engine light on..should be with the MAF disconnected..check and clear the codes..then see what codes come up. If you have a bad MAF..it should throw a code stored in th OBC-2
Thread Starter
Audiworld Junior Member
Joined: Dec 2013
Posts: 15
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Can't really say. The engine computer will go into a fail safe mode if the MAF is disconnected when starting and operate on some standard programming without any impute from the MAF. Might be a bad MAF..or air leaks between the MAF and the intake manifold or vacuum lines.
Is the check engine light on..should be with the MAF disconnected..check and clear the codes..then see what codes come up. If you have a bad MAF..it should throw a code stored in th OBC-2
Is the check engine light on..should be with the MAF disconnected..check and clear the codes..then see what codes come up. If you have a bad MAF..it should throw a code stored in th OBC-2
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The book says you may be right. Be sure your 16486 code is not residual from unplugging the MAF..sounds like you did it correctly. Be sure the connector is good. I think the part number is 078133471A, about $150 new from FCPeuro or $60 from Hans Auto...or if you have a bone yard nearby, that MAF was used on several Audi cars with the 2.8 12v engine:
16486/P0102/000258 - Mass Air Flow Sensor (MAF/G70): Signal too Low
Possible Symptoms
Malfunction Indicator Light (MIL) ON
Loss of Power
Possible Causes
Wiring and/or Connector(s) from/to Mass Air Flow Sensor (MAF/G70) faulty
Mass Air Flow Sensor (MAF/G70) faulty
Possible Solutions
Check Wiring and/or Connector(s) from/to Mass Air Flow Sensor (MAF/G70)
Check/Replace Mass Air Flow Sensor (MAF/G70)
16486/P0102/000258 - Mass Air Flow Sensor (MAF/G70): Signal too Low
Possible Symptoms
Malfunction Indicator Light (MIL) ON
Loss of Power
Possible Causes
Wiring and/or Connector(s) from/to Mass Air Flow Sensor (MAF/G70) faulty
Mass Air Flow Sensor (MAF/G70) faulty
Possible Solutions
Check Wiring and/or Connector(s) from/to Mass Air Flow Sensor (MAF/G70)
Check/Replace Mass Air Flow Sensor (MAF/G70)
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Thread Starter
Audiworld Junior Member
Joined: Dec 2013
Posts: 15
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The book says you may be right. Be sure your 16486 code is not residual from unplugging the MAF..sounds like you did it correctly. Be sure the connector is good. I think the part number is 078133471A, about $150 new from FCPeuro or $60 from Hans Auto...or if you have a bone yard nearby, that MAF was used on several Audi cars with the 2.8 12v engine:
16486/P0102/000258 - Mass Air Flow Sensor (MAF/G70): Signal too Low
Possible Symptoms
Malfunction Indicator Light (MIL) ON
Loss of Power
Possible Causes
Wiring and/or Connector(s) from/to Mass Air Flow Sensor (MAF/G70) faulty
Mass Air Flow Sensor (MAF/G70) faulty
Possible Solutions
Check Wiring and/or Connector(s) from/to Mass Air Flow Sensor (MAF/G70)
Check/Replace Mass Air Flow Sensor (MAF/G70)
16486/P0102/000258 - Mass Air Flow Sensor (MAF/G70): Signal too Low
Possible Symptoms
Malfunction Indicator Light (MIL) ON
Loss of Power
Possible Causes
Wiring and/or Connector(s) from/to Mass Air Flow Sensor (MAF/G70) faulty
Mass Air Flow Sensor (MAF/G70) faulty
Possible Solutions
Check Wiring and/or Connector(s) from/to Mass Air Flow Sensor (MAF/G70)
Check/Replace Mass Air Flow Sensor (MAF/G70)
Next thing on the list.....Get drivers cat over without breaking another stud on the manifold....... Thanks guys!
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