Josh_C

I recently picked up a 2004 S55 and it seems to have an issue starting after its been driven. The car will crank and crank but not start. Sometimes it will fire up after cranking a few times, other times I need to wait like 20 minutes and then it will start. I have replaced the camshaft position and crankshaft position sensors with no luck. I took it to a shop when I first got it to get a pulley changed and they scanned it but found no issues. I do have a check engine light but it is from code p0422, which I figure is from the resonators being deleted. Anybody have any idea where I should start?

StarvingArtist

Check your fuel pump connectors and relay.

4runnerAmg

I would say check position sensor again or the fuel pump.

GrepAwk

again.

What at you describe for a symptom is exactly what people say about Crankshaft Position Sensor. "After car is warmed up, it will not start until it has cooled down. "

So my recommendation is to swap it again