Hard start after shut off.
09-21-2008, 04:51 PM
#1
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Hard start after shut off.
I started drove down the street to the store and then no start.
I cranked for about 10 seconds, I shut off and then started right up.
It's almost as if there was no fuel.
If I shut down and then start it immediately it'll start. If I let it sit for a short while, no start.
I have to crank, stop and then start.
Ran VAG-COM, no faults found.
I cranked for about 10 seconds, I shut off and then started right up.
It's almost as if there was no fuel.
If I shut down and then start it immediately it'll start. If I let it sit for a short while, no start.
I have to crank, stop and then start.
Ran VAG-COM, no faults found.
09-21-2008, 05:20 PM
#2
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Definitely fuel related.
I know I've said this before to some other post and have been wrong, but it just screams fuel pressure regulator to me. I had the exact same symptoms on a 2000 Chevy Silverado and that was indeed the culprit. There is a way to clean it believe it or not. You can remove the FPR, pull out the nylon mesh screen and blast it out with brake cleaner. Then use a little silicone grease around the o-ring seal, slap it back together and reinstall.
However, you may want to see what others chime in with first before messing with that thing.
However, you may want to see what others chime in with first before messing with that thing.
09-21-2008, 05:23 PM
#3
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Re: Definitely fuel related.
Now that you mention it, I did have similar issues with my V8 quattro. I guess that's a good place to start.
It wouldn't hurt to clean it if that's the culprit or not.
Thanks.
It wouldn't hurt to clean it if that's the culprit or not.
Thanks.
09-22-2008, 11:04 AM
#4
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Cleaned FPR, no dice. Will not start on first crank no matter how long I crank.
I have to turn off and then crank again then it'll start.
Does fuel pump exibit such symptoms.
Input appreciated please.
Does fuel pump exibit such symptoms.
Input appreciated please.
09-22-2008, 12:22 PM
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I suppose. I'm guessing an intermittent signal
to the relay (but I come up with wacky theories). Otherwise it could be the dreaded fuel pump failure. Have you changed your fuel filter?
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09-22-2008, 02:01 PM
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Re: Cleaned FPR, no dice. Will not start on first crank no matter how long I crank.
Don't know about this range of V8s, but the fuel pressure regulator on the first Audi v8s were a routine failure item that would result in the system losing pressure when not used for a time--like overnight--so that you had to crank the starter twice or for an extended period to get fuel into a cylinder so it could start. I don't know what "cleaning" it out would do.