Have a 1989 F150, was problem free for the 5 years I have had it until a month ago. The thing started to spit and sputter at cruising speed but would pull out of it within seconds and run good. Problem gradually got worse over the next few days until it wouldnt stay running after I started it. I just assumed It had something to do with the fuel system so I put it in my garage and went to work. I tried replacing the TPS, MAP sensor, fuel pressure Reg and the high pressure fuel pump located on the frame rail. Each to no avail. This truck has duel tanks and runs bad from both so I havent touched them. after a week and a half with no results on my own I decided to seek a pro. $400 later and 3 trips there the problem still exists! The weird thing is that every time it gets worked on it seems to run fine til the next morning. Could this be a clogged Cat converter? This is a double Cat on this truck and I did notice It has a sensor for each and 1 is broke off. What exactly do these sensors do? Any help would be much appreciated! .................coolant temp sensor has also been replaced.
- posted
18 years ago