Rhino058

I have a 1988 Ford Ranger with a 2.9l v6 2wd xlt
the engine was just replaced with a refurbed engine, just recently has started to have only 60miles to the 13 gallon tank, and the plugs are pitch black from getting too much fuel, you loose all power from the engine after only minutes of driving and can barely go past 30mph. ive checked the Oxygen sensor, distributor, plugs, also we have checked timing even when it runs rough and the timing is on.

So if you know of any possiable fixes please respond.

ST3ALTHPSYCH0

Check the catalytic converter. I would recommend taking it out and replacing it with a test pipe temporarily if that model only has one O2 sensor (if it's in front of the converter). Best of luck.

tonon

i would try changing that little black sensor on the drivers side of the engine. its called the DPFE, i know when this goes bad your mileage will drop.

Unregistered

My 88 Also did this and it was the o2 sensor -- if not the sensor check the wires too it

tamrea

I would also check the catalytic converter my truck did the same thing I put a straight pipe in and had all sorts of power. at least till you can replace it.