cookiejar
Member
- Joined
- Oct 12, 2019
- Messages
- 17
- Reaction score
- 3
- Location
- Mesa Arizona
- Vehicle Year
- 1993
- Make / Model
- Ford Ranger
- Transmission
- Automatic
After the truck warms up with a few miles driven with normal acceleration the truck starts to lose all acceleration and bucks or stumbles. There are no check engine lights or codes recorded. I have completed the truck running test and it passes all tests even when warm and the problem is present. I have attached a fuel pressure gauge and the pressure reads about 30 PSI when driving or at idle except when I disconnect the fuel pressure regulator vacuum line which then jumps up to 35 PSI. I have cleaned the MAF sensor and tested the TPS which reads a nice even voltage increase as the throttle is moved. I have checked all vacuum lines for leaks using smoke and repaired a few without it helping. I have replaced the spark plugs, spark plug wires, coil pack and the throttle cable. Possible computer? On only one occasion the truck was sputtering along and I was trying to nurse it up to 35 MPH and it stalled. I pulled it over to the side and started it right back up and for about four miles it ran perfect with plenty of power even squealed the tires and then right back to the same problem again.