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Discussion Starter #1
Hi all.
I have an 95 S4s with about 30k miles on it. Have owned it about 5 years. In the last year or so only when the AC is running the engine wants to not idle smooth when stopping at a stop light it, the engine also kills sometimes. I've learn to adapt and be ready when stopping.
Any thoughts on this frustration?
 

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Have you tried resetting your ECU? Do you still have the EBPV installed and is the throttle jack still operational? Freescan? IAC valve could also be the culprit, but not likely if it idles normally without A/C. If you have disconnected the battery recently there is a very specific 're-learn' procedure for the ECU, which includes turning the A/C on the teach the ECU the idle up process.
 

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Discussion Starter #3
Assume just removing the ECU fuse and or disconnect the battery to reset the ECU?
Have not looked into the EBPV yet.
 

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Assume just removing the ECU fuse and or disconnect the battery to reset the ECU?
Have not looked into the EBPV yet.
Not quite that simple it’s a Lotus😂 this link explains how to reset the IAC and the ECU:
 
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