Code P0300
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 4,043
Likes: 342
From: Central NJ
Code P0300
I keep getting this code. The check engine light comes on, but when I check the codes they say H........I get no C codes. I know its a misfire code but my wires and plugs are pretty new and seem ok. Any thoughts or advice.
Thanks,
Tony
Thanks,
Tony
Drifting
Joined: Aug 2001
Posts: 1,903
Likes: 0
From: Oakhurst NJ
Re: Code P0300 (tabbruzz)
Have you added headers recently? The heat from them can cause a misfire. I put mine on myself and cracked a plug doing it. I got the same code and couldnt figure out why untill my dealer saw the plug was cracked. I bought new wires too to help from the heat. I suggest replacing the plugs and go to wires next if that doesnt help. :cheers:
Thread Starter
Safety Car
Joined: Feb 1999
Posts: 4,043
Likes: 342
From: Central NJ
Re: Code P0300 (kh24)
Yes I did just put headers on and I figured it was related. My car was prone to random misfires prior to the header install, but a code was never set. I guess I will look into better wires and new plugs. I currently run the NGK55s and stock wires....
Drifting
Joined: Aug 2001
Posts: 1,903
Likes: 0
From: Oakhurst NJ
Re: Code P0300 (tabbruzz)
If the plugs were left in during the header install, like i did on mine, then the header might have hit into a plug and cracked it. I also would only get history codes...i got one current one when driving and i checked it right when the engine light came on. When i got new plugs i put in the NGK 55s and MSD wires and have not had one misfire since then. I think the plugs and wires will straighten you out. :cheers:
Le Mans Master
Joined: Aug 2000
Posts: 6,447
Likes: 0
From: Scottsdale, AZ
Cruise-In III Veteran
Re: Code P0300 (tomdcarguy)
Hey Tony....Maybe you have some cobwebs in the spark plug wires causing the misfire!!! :lol: :lol: :lol: :lol: :lol:
Race Director
Joined: Aug 1999
Posts: 15,466
Likes: 0
From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
Re: Code P0300 (pkmoose)
After installing a new cam, I starting getting the check engine light and the misfire code. I had to raise the in gear engine idle. It takes about three misfires before the check engine light comes on.
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Drifting
Joined: Aug 2001
Posts: 1,903
Likes: 0
From: Oakhurst NJ
Re: Code P0300 (tabbruzz)
Very funny.....Maybe its my damn mechanic at Surf that screws everything up....