S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

car doesn't want to start at times... it cranks fine.. new battery.. new plugs.. stage 3-..

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Old Jan 12, 2006 | 07:49 PM
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Default car doesn't want to start at times... it cranks fine.. new battery.. new plugs.. stage 3-..

right after i drive it a bit hard and turn it off. Sometimes it doesn't start up right away, it cranks fine but doesn't catch. So, I have to let it sit for about 10 mins before giving it a go and then it starts up. Once started it never stopped on me until today when i was filling gas while the car was running and when i came back out after paying, the car had cut off on its own and then it took me several tries and 10 mins later, it finally started. Any guesses? TIA
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Old Jan 12, 2006 | 07:51 PM
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Default Bad coolant temp sensor?

It's cheap, just replace it and see if it helps before you chase down other issues.

Until you replace the sensor...hold the gas pedal to the floor on warm starts. Hopefully that will prevent fuel from flooding the cylinders on warm starts.
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Old Jan 12, 2006 | 08:07 PM
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Default my car is doing the same thing.... every once and while it will take 10-20 turns the get it fired.

can you break down where the coolant temp sensor is and swap procedure... that sounds like a decent place to start.
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Old Jan 12, 2006 | 08:09 PM
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Default There's a write up around here somewhere...

start with EdyJun's directory...it's gotta be in there. It's under the accordian hose that leads to the Y pipe.
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Old Jan 12, 2006 | 08:12 PM
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it's not the sensor opposite the after run on the back of the motor is it? on that hardpipe.
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Old Jan 12, 2006 | 08:17 PM
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Default I think there might be two sensors back there...

one on the driver's side, and one on the pass side (under the accordian hose). Obviously I'm talking about the one on the pass side. Does that help?
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Old Jan 12, 2006 | 08:29 PM
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changed it already! any other thoughts?
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Old Jan 12, 2006 | 09:22 PM
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What programming/injectors/FPR are you running?
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