Engine Performance problem
1999 Toyota 4Runner 6 cyl Two Wheel Drive Automatic 138, 00 miles
We have an intermittent problem that only occurs sometimes when the car first starts. It runs rough and then smooths out and runs fine after 2-3 minutes. It seems to only occur if we have previously driven the car that day. Sometimes when we start it and it runs rough just turning off the car and starting it up again can fix the problem. Sometimes we have to drive it for 2-3 minutes for it to smooth out. The problem has not yet occurred at the first start up of the day. The engine light has only come on once and went off after the engine smoothed out. The repair shop cannot find anything on the computer during diagnostics. We asked them to replace the spark plugs, spark plug wires, fuel filter and air filter and they argue that those parts are not due to be replaced (especially the " lifetime fuel filter" ) and don't want to start replace parts until they can find the problem.
We have taken the car to the repair shop twice now and they cannot duplicate the problem. They have run all kinds of tests and say the car runs great.
Have you seen this before? Is it something we should just learn to live with or could this be causing damage to the engine to run it while it is running rough?
Friday, September 11th, 2009 AT 11:18 AM