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View Full Version : B5 A4 Starts, won't run



AnthonyW
03-04-2014, 05:48 PM
Hi all,

I have a 2001 B5 A4, 30v 2.8 V6, manual.


Currently it starts on the first turn of the key, but then promptly cuts out. If I press the throttle pedal, it stutters for five seconds at circa 300 rpm, then dies.


How we got to this place:
A couple days ago, I pulled a check engine light, and it was running a little oddly. Mostly smooth, but some jerky throttle response between 1000 and 2000 rpm. And a few times I'd been slowing from 60mph in fifth gear, put the clutch in to change down to fourth, and the engine cut out. Released the clutch and it crash started and ran as normal.


I'd been meaning to get my VCDS-Lite registered, so started that. While waiting for my registration code to come through, I found some advice somewhere on the internet that suggested disconnecting the battery, waiting, and reconnecting. I did this, and that is when the starting but not running began.


My registration code has since come through, I cleared the fault codes and completed a throttle body alignment. No change.


The fault codes were:
16684 - Random/Multiple Cylinder Misfire Detected 16684/P0300/000768 - Ross-Tech Wiki (http://wiki.ross-tech.com/wiki/index.php/16684/P0300/000768)
17536 - Fuel Trim; Bank 1 (Mult): System too Lean
17536/P1128/004392 - Ross-Tech Wiki (http://wiki.ross-tech.com/wiki/index.php/17536/P1128/004392)

16891 - Idle Control System RPM: Higher than Expected


16891/P0507/001287 - Ross-Tech Wiki (http://wiki.ross-tech.com/wiki/index.php/16891/P0507/001287)



plus fault codes for individual cylinder misfires, cats running below efficiency



About three months ago, I replaced both O2 sensors, the coolant temp sensor, and all spark plugs. After that it was running sweetly.


Any suggestions?


Best wishes,
Anthony

AnthonyW
03-04-2014, 06:09 PM
Just to add:
None of the fault codes are returning when it starts and then dies. I have tried this several times.

27litres
26-06-2014, 01:53 PM
Sounds like immobiliser to me - any flashing yellow symbol in the tacho?
Looks like a car with a big key in the boot...