Question about 1991 Ford F250
I HAVE A CODE 32 AND 35. I HAVE REPLACED THE EGR VALVE,THE EVR SOLENIOD,AND THE EVP SENSOR. THIS VEHICLE DOES NOT HAVE A DPFE SENSOR.I HAVE MANIFOLD VACUUM TO THE EVR SOLENOID,BUT THE SOLENOID DOES NOT SEEM TO BE SUPPLYING VACUUM TO THE EGR VALVE. I HAVE POWER TO THE SOLENOID BUT NO GROUND.THE GROUND, I THOUGHT CAME FROM THE PCM, I REPLACED THE PCM AND STILL NOT WORKING. CAN YOU HELP ME.
In all the technical data I have access to Snap-on, Mac, AllDATA and most service manuals all tell you to start with a wiggle test and clean all grounds.
Wiggle test means wiggle the wires and connectors while te engine is running and see if there is a change in performance. I suggest unplugging the connectors one by one and doing a visual inspection on them, look for green corrosion rust oxydized connections etc, add a little bit of di-electric grease and plug it back in, for the grounds that are bolted on remove these but be careful not to break off the rusty ones then use 400 grit sandpaper and shine up the mating surfaces add some di-electric grease and re install. Before you start to clean the connectors and grounds remove the neg off the battery, it will reset the check engine light if left unplugged for 30 mins
Posted on Mar 23, 2009
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Posted on Jan 02, 2017
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