Ok, my wife has a 99 Civic HX with about 89K on the car. She told me the was jerking really bad so I took her car for a few days to drive it. It starts fine, idles fine, but when acceleration, the car hesitates really bad. So when I was driving the CEL (MIL) light came on and gave codes P0300, P0301, P0302, P0303, P0304 wich is general misfire and all 4 cylinders misfiring. So I changed the cap and rotor with OEM Honda parts and put in new NGK spark plugs and gapped them to .43. I did not change the plug wires yet because after I did the cap/rotor/plugs the car was fine. Yesterday she drove it again and said its doing it but no CEL came on. I just dont want to buy new wires if thats not the problem. But I probably will anyway. I guess I am just looking for some insight.

Thanks.

 

did you check for vacuum leaks?


EDIT: I'm only allowed 5 posts per day and I cant post right now so I'll add it here:

Spray your vacuum lines one at a time with carb cleaner, if your rpm's drop or sounds like that car wants to die, you have a leak there.




Modified by trboeclpse98 at 10:24 AM 12/6/2006

 

Is there an easy way to check for leaks? I looked really close and listened and found nothing but I dont know if I am doing it right.

 

Check your fuel pump. There was a guy that came into autozone the other day with the same problem and ended up being his fuel pump.

 

i had the same problem on my 240sx. i took off the fuel filter and couldnt blow through it so i replaced it now i have no problems. if that is not the case check injector flow... good luck