Engine Performance problem
2001 Ford F150 V8 Two Wheel Drive Automatic
My truck runs good for a few miles but after that it runs sluggish like I am pulling a huge load. New plugs new cats and muffler new, throttle position sensor, new belt, Cold air intake. Not throwing any codes. I run 93 octane and ran fuel treatment. Some days it runs fine all day and others its horrible. Its actually Idling little High now. It eventually comes back down to 600 but kinda hangs around 1000 when sitting still. Idles smooth tho and always starts fine. Gets good fuel economy also. 99k miles. Please help. I am very frustrated. My truck has always ran fine until I changed the plugs. Ford motorcraft plugs and they are gapped.54. No leaks anywhere.
have the same problem?
Monday, August 17th, 2009 AT 6:07 PM