Question about 1989 Ford F 150
I've changed the plugs, wires, distributor cap, rotor and upstream O2 sensor. The Egr value is giving a bad reading, but I just can't pin down the problem. I thought about removing the Cat., but don't know if that will fix anything.
ASE mechanic here:
Try running engine with o2 sensors removed. if runs different suspect cats, and or install vacuum pump on egr, if egr is ok then motor rpm shall decrease with more vacuum if egr is not working there would be no affect on engine rpm, Keep me posted
Posted on Jan 26, 2009
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Posted on Jan 02, 2017
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