ok placing order for egr,egr solinoids (2) and the gp relay.i let you know what i find out .thanks Mayham

 

Get AC DELCO parts trust me on this I know they cost more but there is a reason

 

i agree but having trouble locating an auto store that carries ac delco parts.any idea's?

 

The big 3 can get AC parts they may have to order them if not get napa parts as a second choice

 

ok, instead of ordering everything i picked up a new gp relay.sorry but (standard) brand I found out anyway that mine might have been good. there is a short in a wire i think in the cluster behind the fuel filter not sure yet kinda straightened them out somewhat. kept blowing engine fuse (20a) so far no fuse blown.
lastnight i kept looking at glow plug fuse.
it runs now. So now i can do other tests on egr system.Still getting code 33 = egr control pressure/baro sensor circuit high (low vac) after putting the pedal to the floor on test drive. with in that noticed oil pressure really low engine and engine spitting and sputtering at an idol.i checked vac to egr solinoids w/green dot has vac. Middle one no vac (I dont know what color dot missing)and of course no vac on third w/white dot closest to firewall. when I reset the computer vac works on all 3 solinoids. But still spitting and sputtering engine revs up and a nother blown engine fuse.Now i did clean the ports in the intake this morning i dont know if this may cause the spitting and sputterin. So still stumped on that .
Now, is there something else that would send a signal to shut these solinoids down or just bad solinoids? I realize I am dealing with 2 different problems.(OR MORE)

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found out why engine fuse kept blowing.A short in the heating element wires, located on the bottom of fuel filter canister.which coused the glow plug relay not to work.Once I fix that issue.I will get back on the egr solinoid crap.

 

To your 1st question yes there is a PCM, Powertrain Control Module behind the glovebox, with the odd codes you have glow & EGR are no way connected I suspect you are having grounding issues which your vintage vehicle not uncommon.

Passenger side rear head stud are where the gnds for PCM-Glows is must be spotlessly clean.

Site mods if you have to delete the hotlink I understand but this can be helpful to the 6.5ers here Grounds what are they & where are they

You said 4x PMDs???? where do you have yours mounted currently ? anywhere under the hood is bad ju-ju it needs to be remote mounted on a cooler plate to have any chance of surviving.

 

Ok order came in .New fuel warmer, which was causing the fuse to blow.(exposed wires).
put all 3 egr solinoids on and egr sensor located on firewall. So far so good no codes and running strong.and yes all ac/delco parts. I want to give thanks to MAYHEM for all info he has given.let ya know how it goes.

 

good deal diffrangle