GMC Repair: 1995 GMC Jimmy 6cyl Vortec/4wd, crankshaft sensor, oxygen sensor

Question
This is my son's vehicle.  Runs rough, idles poorly, and accelerates poorly.  Service Engine light ON.  Auto Zone code reader shows p0172 and p0300.  I have replaced plugs, dist. cap and rotor,wires and oxygen sensor.  I have cleaned the LEGR valve.  STill same readings, same engine performance.  Any suggestions?

Answer
wITHOUT performing ALL of the diagnostic procedures, Of which I HIGHLY RECOMMEND BEFORE replacing ANY parts the most likely suspects would be:

p0172 = Oxygen sensor(s) problem.

p0300 = Crankshaft sensor fault.


Once you purchase these ELECTRICAL parts, They become NON-RETURNABLE.

If you have NO use for your OLD parts, I would like to have them and you can e-mail me at:

[email protected]


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