Quote Originally Posted by Justinzoso View Post
About a week ago, I decided that it was probably time to change the fuel filter as it probably hasn't been changed in a long time. The funny thing is, on the way home from the parts store, the car started misfiring badly, more like stumbling like it was running out of gas. I changed to fuel filter, and sure enough it was just about completely clogged. Did and oil change as well and took it for a test drive to see if the new filter solved the problem. The problem went away at first then came back.

These are my symptoms: After starting the car, it just about dies and then idle picks back up. Sometimes at idle, the rpm's will surge and sometimes they will stay steady. While driving, sometimes the car will misfire/stumble badly(like running out of gas) and while that happens, if you give it more gas, it gets way worse.
Thinking that seeing as how the fuel filter was clogged, maybe the injectors could be dirty/clogged, I added a can of Seafoam to a full tank of gas. The idle and misfire/stumble seemed to not happen near as much, but the idle still surges. The codes are; p0102, p0300 and p0442.
The car has about 260K on it and the engine has somewhere around 85K I think. Even though the problem seems as though it might be getting better, I have a feeling that it isn't fixed. What am I missing here? Anyone have these problems, and have all three codes, and not just the p0102 code that is usually associated with this problem? Any and all help and ideas are not only welcomed but very much appreciated. This is my daily driver and I count on it, and can't have it let me down.
Well...there are few things to consider.

1) Clean your MAF - use any Electronics parts cleaner - and do not touch the sensor wire. If you're running an oiled (K&N) air filter, this could cause your problem.
2) Make sure your plug wires are solidly connected, and are not cracked or separating. It might also be worthwhile to remove the coil packs and clean under them. Do a search on this issue.
3) This might sound really dumb - but trust me. Check to make sure that your gas cap is tight. Inspect the inside of the filler neck and make sure it isn't dirty/corroded and preventing the cap from creating a tight seal.

-Swash