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Title: Problem A3 8L -00 Will not start when enging is warm but when it is cold Post by: slowrider on November 03, 2014, 12:13:17 PM Hi
My old car got a new problem. Changed Coolant Temperature Sensor 059 919 501 A But this didn't help. VCDS reads no errors. No MIL light. Any advice? ??? Title: Re: Problem A3 8L -00 Will not start when enging is warm but when it is cold Post by: slowrider on November 03, 2014, 12:14:11 PM Forgot:
Nothing in the logs.. Title: Re: Problem A3 8L -00 Will not start when enging is warm but when it is cold Post by: slowrider on November 04, 2014, 06:16:56 AM Any hint on what to look for?
Title: Re: Problem A3 8L -00 Will not start when enging is warm but when it is cold Post by: erecker on November 04, 2014, 08:24:08 AM Hard to tell without looking at it. Does it just crank and crank (~15 seconds) but never start when engine hot, do you hear it 'trying' (some cylinders firing)?
What I'd do is this: First I'd start it cold and take a look at fuel trim corrections (engine group 32 33) these should be +/- 5 or so, if its a high number you may have a vacuum leak somewhere. While I was starting it I'd log injector times and ignition timing and compare between cold start and hot start and see if there's any big difference. I'd also unplug all spark plug wires and plug them back in, making sure they all have a good connection. If all of that didn't help it I'd pull the spark plugs and either clean/gap them or replace them if it's been a while. Hope that helps some and good luck! Title: Re: Problem A3 8L -00 Will not start when enging is warm but when it is cold Post by: Waspjr on November 07, 2014, 03:26:24 PM When its hot and not starting check on a live data stream for a rpm signal while cranking. This is essentially testing your crank position sensor. Also could be a fuel trim issue having to do with running in closed loop and when open loop comes along it craps out
Title: Re: Problem A3 8L -00 Will not start when enging is warm but when it is cold Post by: Waspjr on November 13, 2014, 04:00:47 PM Well find out anything ?
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