Engine Performance problem
2003 Ford Focus 4 cyl Front Wheel Drive Automatic 109000 miles
I just had a timing belt changed, and motor runs somewhat better. Have changed every sensor I can think of, and all 4 injectors. I have an after market coil and wires from Davis Unified ignition, over a year old. Car has a very rough idle when cold, and really sucks gas. Even if I drive 50-60 mph. It runs better when warm. I am also using Pulstar spark plugs, with a.045 gap. This is fixed. Car will idle smooth when stopped, and then start acting as though it is missing on one or two cylinders. It also sucks gas after 65 mph. I can watch the gas gauge go down! The local garage cannot diagnose the problem. No codes. Car ran rough before the coil and wires. They helped a little. Any suggestions, please? Thank you.
Friday, April 11th, 2008 AT 2:51 PM