95 powerstroke fuel/injection problem - Ford Powerstroke Diesel Forum
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Old 11-23-2006, 07:13 AM
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95 powerstroke fuel/injection problem

need help have 95 350 pwrstk
ran good parked it last night and won't start this morning
bled of filter and drained
no air bubbles now.
will this engine run with the left back injector wire plug un hooked ??
this injector wire harness started smoking and got hot when i was tring to
start it this morning.
it will not even try to hit off no smoke either.
how do i check to see if the injectors are working i don't thing they are hitting??
motor had a miss for a couple months until it warmed up then it quit
and ran great.
is their a relay?
what should i try i have not worked on a powerstroke before
i am going to pul the vale cover on the left bank to see if the wire is
rubing and grounded out on the inside later today

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Old 11-23-2006, 04:52 PM
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Re: wiring harness

If the wiring harness got hot or smoked you more than likely have a grounded wire in it. you can test for grounds with an ohm meter on the wires under the valve cover by reading the pins to ground. the outboard pins on each end of the valve cover go to the glow plugs. They will read a low resistance of about 1 to 2 ohms if they are good and not open, a reading of zero ohms would indicate a short to ground. The inner pins on the connector go to the injector coils. Check them for a reading of zero ohms to see if they are grounded.
They wiring under the valve cover can get damaged and might have a ground.
as far as the engine running with all 4 cyclenders on an engine being disconnected, I don't think it would run because of the great cyclinder pressures the engine has to overcome in the dead cyclinders. It might run with only two cyclinders disconnected, but really crappy. If it was me, where you saw the smoke is where I would start looking.

Good luck
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Old 11-23-2006, 07:08 PM
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94, 95, 96 PSD's are known for melting the wiring harness, I would reccomend replacing Both valve cover gaskets and all 4 under valve cover wiring harnesses, You can get kits to fix the engine wiring harness, or you can buy a new one. This is pretty expensive, but I have fixed just one side before and it came back later with the other side melted, so i replace all of it at the same time. Yes it will run with one the connectors unplugged. They will run on 6 cyl and on 4 cyl just not very well as can imagine. I have also heard of this wiping out the IDM (injector driver module) it's on the drivers side fender. You will need to fix the harness first to see if the IDM is ok.
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