Help, car running like crap!
Thread Starter
Instructor
Joined: Sep 2003
Posts: 143
Likes: 2
From: Idaho
Help, car running like crap!
I ran the car empty during a DE. When I did that and put 3/4 tank of fuel in it, it still would not run, or even idle. I came home and replaced the fuel pump and it ran great for about three days, now it runs like crap, and barely idles. I checked for the A/C overflow into the computer, but no moisture there. I have Code P0300H, misfire code. Could my fuel filter be plugged up and cause this???? Out of ideas.
Thanks in advance!
Thanks in advance!
Last edited by Jake99; Jul 20, 2004 at 02:00 PM.
Team Owner
Joined: Jul 2003
Posts: 20,474
Likes: 2
From: Detroit
P0300H is a 'Engine Misfire Detected' code. Have you checked your plugs and wires? The 300H errors has been reported a number of times following the install of LT headers. Is your car throwing any other codes?
Mark
Mark
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Carefully remove each wire and measure the resistance from end to end. Each wire should be within this range: 250 ohms to 750 ohms. and the insulation can NOT be burnt! If you have wires that measure in the thousands or megohm range, you have found your misfire problem! 
BC
BC
