excessive smoke

For us to be able to assist you, it is absolutely necessary for you to include the make, model, year and mileage of your car. also the tranny

[quote:fd74d841ad="david718"]i have mitsubishi 97 eclipse GS, 71788 miles, when i start it, more than usual smoke comes out the tail pipe, it is not white, blue or black, just gray, but after driving about 5 min exhaust smoke is fine meaning can barely see it coming from tailpipe, what could it be[/quote:fd74d841ad]

Light gray smoke is a sign of a mild rich condition caused by a sensor not working properly. It needs to be scaned by a mechanic so he can read the computer data stream and see how the sensors are reacting and if you are tranfering from closed loop to open loop.

You engine has been known for early ring failure also. Good luck