Engine Performance problem
1991 Ford Ranger 4 cyl Two Wheel Drive Manual 90,000 miles
The truck runs fine until it is warmed up and then I get a check engine light. The truck then starts to miss and sputter and nearly stall when I give it gas. It almost seems like its running out of gas but instead of stalling, It backfires very badly when sputtering. It only does this over 2000 rpm. The tuck idles fine and runs great until its warmed up. I had previously noticed a decline in fuel mileage. Another thing is that if I shut the truck off and then start it up it will run fine again for a few miles.
I have tried a new MAF sensor and a new computer, neither helped. Both shops I took it to thought it was the MAF or computer.
The codes they were getting were low voltage to the MAF and ERG. Nothing about the fuel pump at all.
Could it be the catalytic converter or a bad coil? I was also wondering if its something in throttle body.
have the same problem?
Wednesday, August 20th, 2008 AT 2:17 PM