Quote:
Originally Posted by cpiddy7
Hey there. Ive got a 1997 S40 2.0i and ive got a hesitation when the engine's cold. Its almost as if the car has a slight misfire. If you give the car more revs i seems to go through it. Once the car has warmed up the car seems to drive fine. The garage had the computer wired up to it and they couldn't find any problems. The car had a service recently so it's not the spark plugs or leads. Someone suggested it could be a faulty coolant temperature sensor. If you find out what your problem is id like to find out how you cured it. Many thanks Chris
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From what you have told us, I would say that your problem is something different, for a start your car is not turbocharged and not a diesel, and your problem only happens when car is cold. It could be worth you changing the coolant sensor, it is quite simple and cheap. Your symptoms
could be explained by the ECU believing the engine is warmer than it is. A pity the garage didn't run a real time analysis of the engine temperature as told to the ECU, that might have given more clues. Does it idle a bit duff when cold as well?
Pete