Ok so about a month ago I have a few CEL codes and most of them were misfires so I did the normal thing and I replaced my spark plugs, spark plug wires, distributor cap, and coil pack.

After that the car ran fine and the CEL stayed off. Now Im starting to notice my car is not catching when I accelerate in 3rd, 4th or 5th gear and takes a second or two before it does and right after that my CEL came on.

Codes ran: P0302, P0304, P0300, P1399. All which are typical misfires I had before. What else can I do to fix this issue, I spent so much replacing all the parts named above and since I replaced the coil pack and dizzy cap I hope I don't need a new distributor?

 

Anyone?

 

Check your timing?

 

Nope I never did that? Easy or hard?

 

Did you replace the rotor?

 

Yes Rotor was replaced.

 

I read somewhere that a bad alternator belt can do this? Because next week Im replacing all three of my belts excluding my timing belt because they are old, worn and squeal, anything?

 

Have the ICM tested.

When was the fuel filter last replaced?

 

Fuel filter has probably never been changed. So replace that and check my ICM?

 

Ok so i replaced the Fuel Filter today with an Autozone Duralast one. The CEL has not come on since I cleared the first one, but my car is idle at almost the bottom line roughly around 100-200RPM's tops at an idle.

Is there a way I can test my ICM or should I just replace my old one? With some research it looks like if I had ICM problems my car would more stall and have trouble starting than the rough and low idling and misfires?

 

Anything? Im running out of ideas!?