Rep Power: 0

ok so heres the deal, i have a 2000 civic ex d16y8 and it started missfiring real bad, got the codes checked and it said p1399 which is egr passage blocked or random multipal missfire. so i ran the valves like it said to do and it ran a little better the light came on again got it checked and now it is saying p1399, p0301, p0303, p0304 which is cylinder 1,3,&4 missfire, changed the plugs coil and cap and rotor, cleaned out the cat and this is still happening, pulled cylinder 1,2, &4 missfire the next day along with random multipal and today it said cylinder 1,3,4 missfire again. anyone have any clue what it might be???? Ignition control module???? Fuel filter???? oh and the car lost alot of power too espically in low rpms

 
Rep Power: 214

Hmmm I am kinda stumped here but i am going to have to say that maybe your timing is off. You have replaced basically everything you are suppose to on a missfire and it still is missfiring. It could be a fuel problem but I dunno. The best I can think is the timing. When your timing is off it likes to missfire in a couple of cylinders. So maybe check that. Maybe someone else on here might think of something.

 
Rep Power: 0

well i fixed it, feel stupid but i bought a ignition control module and plug wires aand the wires had a small hole in the the boot i couldnt see when i inspected them the first time andchecked them again today and they were arcing across prety bad

 
Rep Power: 214

Glad you got it fixed.