2.9l v6 trouble
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.