Quote:
Originally Posted by pawoSD
I enjoy reading these diagnosis threads.....everyone has a different thing it could be....personally my 300E has the same issue....it likes to crank before starting.
The following has been replaced on my car so far:
-valve stem seals, uses 0 oil now between changes
-spark plugs
-wires
-rotor/cap
-fuel pump check valves
-injectors
-injector holders/seals
-fuel filter
-OVP
-coil
-Cold start valve has been tested, does not appear to leak
-engine temp sensor
-intake air temp sensor
-crank position sensor
Yeah, and it still does it, especially when hot and having sat turned off for 15-30 minutes.
Tomorrow I am having the dealer test the fuel pressure and duty cycle on the engine to see if they are in spec. Thing is, once it starts, it runs perfect....and gets 20-23mpg every tank.
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I used to have a similar problem with my inline-6 Toyota. I replaced everything, and it still would crank and stumble when hot. I was told that it was caused by "heat soak".
Also, a bad sensor seems like a likely cause. The ECU needs to know when the engine is cold so that it can inject more fuel (open the CSV) and if the temp sensor is bad, then it has no way of knowing.
