I have a Ford 2003 F150 4wd v8 4.6l automatic transmission that the check engine light came on about a week ago. It idles very rough, the RPM's will jump up to 1500 then drop to 500. Every so often it just die at a stop light or stop sigh. This happens only when I am stopped. When I am driving everything is fine. I took it up to have the codes read and it said that he MAF was bad, so I changes that. I drove good for a day the went right back to the same problems. I went back up to have the codes reread and they said the MAF was still bad. I told them I had just changed it. Their response was to drive on it awhile. The problem continued, I asked some friends they recommended I change the IAC valve so I did. Problem continues, I took it to another place to have the codes read and they said the MAF is still bad along with the O2 sensor is bad. I told him I had replace MAF. He thought the O2 sensor is the problem, but then said that would cause your truck to die. I don't hear a vacuum leak anywhere. I am not sure where to look next. Thanks for your Help
have the same problem?
Saturday, June 6th, 2015 AT 2:44 PM