First off, the car is completely stock. I had been having problems with the engine running rough, acting like its missing or not firing. Took it to the dealership, they said I needed a fuel pump and an "induction service" for like 1100 bucks. It didn't sound right to me, so I took it to a local guy and he finds the spark plug wires are very worn and shorting out, so he replaces the plugs and wires. Car runs great now, except now the Service Engine Soon light is on, and he said I just need to reset the computer to turn off the light, but I think it is actually indicating something. I haven't checked the code yet. I think I have an apparent idle problem.
When starting the car cold, the idle goes high (about 1100), then settles around 900, like normal. But when I put it in drive, the idle starts to fluctuate repeatedly from 300 to 700, but the car does not die. Pushing on the gas doesn't really help. After it warms up for a minute, the problem goes away. I also noticed that when coming to a stop, when the auto transmission is downshifting, it downshifts hard, like the engine is revved high while shifting, making is surge forward a little.
Any thoughts are greatly appreciated!
When starting the car cold, the idle goes high (about 1100), then settles around 900, like normal. But when I put it in drive, the idle starts to fluctuate repeatedly from 300 to 700, but the car does not die. Pushing on the gas doesn't really help. After it warms up for a minute, the problem goes away. I also noticed that when coming to a stop, when the auto transmission is downshifting, it downshifts hard, like the engine is revved high while shifting, making is surge forward a little.
Any thoughts are greatly appreciated!