Short drives I can turn car off and restart immediately. If long drive, say 45 minutes, i turn engine off and try to restart, but won't start. I wait 15 minutes and it starts up. What could be the problem and how to I repair it? Thanks
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I would start with a fuel line psi test. then have your fuel acumulator.
check this out and see if it helps. It sounds like you are priming the psi up when cranking then it can go. but when you let it sit the pressure drops and has to build up again. I a not a VW person myself but love tinkering, so let me know how it goes.
ideal situation would be to test for either NO SPARK or NO FUEL at the given moment of no start,Sounds like an electrical intermittant, related to the spark, but what ? Without any failure codes, you have BE THERE, to catch it happen and test. Hope this helps
might check the crank sensor. it is located on the transmission bellhousing on top just off to the drivers side. if the pcm loses this signal the vehicle will die immediately and not restart until it sees the signal again
It sounds like there is a good chance that either your fuel filter is getting clogged or your fuel pump might be worn or faulty. The first thing to do is check the fuel pressure. If it is OK then you should check to see if it has spark. I suspect a fuel problem, but it could also be a spark problem.