Injector 3 open to ground..HELP!!! - Ford Powerstroke Diesel Forum
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Old 02-28-2012, 10:52 AM
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Angry Injector 3 open to ground..HELP!!!

Hey guys,

I've been living in a nightmare ever since I accidentally put gasoline in my 96 powerstroke. Here's what I've done:
-Dropped then drained tank, fuel lines, and bowl and replaced fuel filter
-filled with fresh diesel and lucas additive
-replaced fuel pump (old one was week)

at this point, sometimes it just turns and doesn't seem to fire at all and other times it idles for a while then the whole right bank shuts off..only code showing is #3 injector open to ground. Ran perfectly before I put gasoline in it by mistake. I'm checking the UVCH connection and wiring asap..anything else I'm missing? Any tips to diagnose this code or insight what the problem could be (maybe injector solenoid)?

Some more details:
-I replaced my IDM with remanufactured unit last year
-I had #4 injector tested and it came back ok (before shop told me #3 was out)
-starter and both batteries 1 yr old
-oem glow plugs 6 months old, relay age unknown

Please help me get my truck back on the road! All help is appreciated!

Last edited by BartZ32tt; 03-06-2012 at 04:29 PM.
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Old 02-28-2012, 07:32 PM
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Check your injector solenoid to make sure it is not open-circuited (should be 2-3 ohms IIRC). Cheers!
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Old 03-01-2012, 08:09 PM
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Quote:
Originally Posted by Patrick Feeley View Post
Check your injector solenoid to make sure it is not open-circuited (should be 2-3 ohms IIRC). Cheers!
I know I can check it at the idm connector, but is there a better way?

Update: got all bolts off valve cover except the B*tch in the back. Tried starting beforehand, doesn't sound like its even firing. What should I check/try in a turning but non firing motor? I think the shop I took it to f*cled it up
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Old 03-02-2012, 11:50 AM
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You can check them at the valvecover connections. Each connector/gasket has five pins. The outermost pins on each connector are for the glowplugs. The center pin is common to two injectors. If you probe the center pin and the adjacent pins to it you can measure each solenoid. Cheers!
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Old 03-02-2012, 01:19 PM
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Quote:
Originally Posted by Patrick Feeley View Post
You can check them at the valvecover connections. Each connector/gasket has five pins. The outermost pins on each connector are for the glowplugs. The center pin is common to two injectors. If you probe the center pin and the adjacent pins to it you can measure each solenoid. Cheers!
That's very helpful...thanks!
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Old 03-06-2012, 04:24 PM
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Update: finally got some free time to check resistance. Cylinders 1 & 3 injector solenoids showed a perfect 2.9 ohms. Now I'm stumped..the shop told me #3 injector solenoid was short to ground so I should've seen infinite ohms on #3. Tried starting again and after turning for about 5-10 seconds with 0 firing she suddenly started firing a bit and came close to starting but won't hold idle once I let off cranking with the key. Gonna pull valve cover to check for bad wiring I suppose.

Anyone have any more ideas to help me get back on the road?

Last edited by BartZ32tt; 03-06-2012 at 04:31 PM.
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Old 03-06-2012, 05:37 PM
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I'd venture to guess that's my wiring harness is f*cked...

Anyone ever seen a wiring failure this bad? Wtf! Just don't wanna shell out a couple bills for a new harness if it'll just spontaneously combust like this one did...

Check the rest of my wiring and it seems to be ok. Hopefully this'll get me back on the road..
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Old 03-06-2012, 07:25 PM
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That is a problem. Haven't seen it happen to often but when it does it's with about the same results.
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Old 03-07-2012, 04:52 AM
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it happened on one of my trucks, throw a new one youll be fine, seems bad glowplugs can cause this too so might want to replace them while your in there
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Old 03-07-2012, 05:03 AM
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I've seen harnesses look like that before. Normally you'll find the adjacent glow plug out. My theory is that as glow plugs go out the ones that are working are pulling more juice, causing overheating in the wiring connections, especially if the terminals have some age on them and aren't tight.

At least check the glow plugs and replace the valve cover gasket/UVCH harnesses and you should be fine.
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