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My 1997 Cavalier check engine light is on. What are the possiblities?
In addition, the car starts hard when it is already warm (after driving).. The car starts great when cold.
83,000 miles on it.
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Is the battery fully charged for the cranking operation? If it is and still cranks slowly check to make sure that there is no corrosion on battery contacts. If all checks out fine it is possible that the engine may have overheated before you owned it and some parts expanded and were damaged with result that it is hard to turn the engine over .
Sounds like a fuel supply issue. A cold engine requires more fuel to start/run effeciently. There are many things that can cause this problem. Possible fuel pump bleeding fuel back into the tank/bad fuel filter/improper reading from temperature sensor/ wiring issue/poor tune up parts just to name a few
Sounds like possibly more than on problem, crankshaft position sensor, or ignition module likely on starting prob which maybe affecting shifting due to hard code in ecm, or shift prob could be shift solenoid in valve body of transmission. Both parts readily available from local parts store
A vacuum leak is likely. Spray some carb cleaner on the intake manifold gasket while the engine is idling. If the speed changes, you have a leak where ever you sprayed.
It sounds like a fuel pressure problem. Does it start hard after it is warmed up or only when it is first started cold? Do you have access to a fuel pressure guage?
Coolant temperature sensor sounds like it went bad. It is reading that the engine is warm all the time, so the computer is not commanding additional fuel for startup. Easy and cheap fix.
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