Engine Performance problem
2003 Ford Expedition V8 Two Wheel Drive Automatic
Hi, I am trying to an answer or orientation to fix a stubborn problem I am having with my 2003 Expedition. The check engine light came on and it gives me P0171 & P0174. I replaced the oxygen sensors but had no luck. I also just had it tuned up with autolite spark plugs, oil change, air and fuel filters. I also replaced a spark plug coil that was not working. Had the check engine light turned off but still persistent. Went to a garage and had the fuel injectors cleaned but no luck. Someone told me to check the engine compression, Can you point me in the right direction or suggest something I am out of ideas. I would greatly appreciate it, Thanks.
Saturday, February 21st, 2009 AT 5:27 PM