Ok,

this is getting on my nerves. Over summer, the car started acting up. Whenever I leave the car and the engine is warm, upon coming back, chances are I could crank forever and nothing would happen.

When that happens, sometimes it might seem like it's going to fire but it doesn't. Other times it just cranks to no end.

If I give up and crank it again, it fires up as if nothing ever happened.



Power is good, mileage is good, everything else is fine. Never a problem when the engine is cold though.

Mind you, it does not happen all the time.

The spark plugs, distributor rotors, caps are recent - say about a year ago or 10,000 miles.

Over summer when it started acting up, the dealer replaced the crankshaft position sensor and shimmed it as per MB's suggestion. They also claimed that they could not replicate the problem.

Upon taking the car back, I stopped for gas. When I tried to fire it up, it just kept cranking. But! The second time I tried (right after), it fired up like it would normally.

It did it again a while back, and in the past two days it failed to fire up three times.

The wiring harness is new too.

Any ideas?

Plug wires maybe? or should I try replacing the spark plugs anyhow? I do have 8 Bosch Supers doing nothing on the shelves somewhere.

Fuel Pump? Fuel Pump Relay of some sort maybe?

Any suggestions will be great. The car is obviously going back to the dealer that tried to fix it. What a waste of money it was!

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2008 BMW 335i Coupe