1992 pontiac grand am, 2.3 quad 4 sohc hard to start when engine is cold, mileage is approx.85000 miles. This all started back in january when the car failed emmisions and the shop replaced the oxygen sensor. The next morning the car would pop and backfire and was hard to start, I took it back to shop and they ran code tester on it with it saying nothing wrong. Once it is cranked in the morning it is fine the rest of the day, I replaced the coil housing, fuel filter, tuned it up, checked vacuum hoses, plug boots, cleaned throttle body, I am stumped, and I have worked on cars for years. Any ideas where to go next?
have the same problem?
Friday, October 26th, 2007 AT 6:38 PM