1 dead Injector - Ford Powerstroke Diesel Forum
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Old 06-14-2013, 07:32 PM
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1 dead Injector

95 7.3 5 speed, just bought the truck real cheap it had an intermittent rough idle , but would randomly clear up and drive but still had an obvious miss, found passenger side uvch melter at #1 injector pin at the gasket, replaced gasket,harness and outter plugs. Still misses. Scan tool showed #1 contribution fault, after I replaced VCH I ran another buzz test and show whole passenger bank high to low fault but truck still runs good (minus the miss)

I didnt think it was normal for an Injector to just die...any ideas??
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Old 06-14-2013, 08:24 PM
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Let me draw it out a little better last post was from my phone and its a PITA to type on,

truck had an intermittent rough idle, While it was doing this i pulled both plugs on the passenger side VCH and it made no difference, I then found that the connector was melted from the glow plug wire that ran next to the #1 injector pin. So i then replaced the gasket and the UVCH, I ran a buzz test prior and showed #1 fault.. after i replaced the gasket and harness I ran another buzz test and still got the #1 fault but also showed all passenger side high to low fault.. which it didnt do before. At this point I had not replaced the outter plugs as they still looked good but both had the clips broke off.. so today i decided to replaced them thinking I might find a bad wire, at first i wires the 1, 3 plug injectors backwards. (the colors changed and i was in a hurry) wen i tried to start it, it ran but obviously horribly, I found my mistake and corrected it..

but heres the weird part, when i started it after fixing, it still ran very rough. i let it run and i went under the hood and was able to unplug both passenger side harnesses and it made no difference, then like magic as i grabbed the rear one again it cleaned up the idle, then like magic again it as i grabbed it it cleaned up alittle more, i then pulled the rear plug and it made an obvious difference and then pulled the front and it made an obvious difference but still had the #1 miss, after that it ran just like it did before,,

so My question is for one, whats going on with my #1 injector and two is this a wire problem or an IDM problem.. i dont believe I did anything when i grabbed the wires the connections were solid and I even tried to make the reverse happen by pulling and slightly twisting the plugs and nothing.. basically it did the exact same thing it was doing when I bought it only I thought I fixed that with the harness simply because it hasnt done it since.. any ideas? thanks!
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Old 06-15-2013, 07:08 AM
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You may want to pull the IDM and check the condition of the connector and pins. You can also see if there is anything sloshing around in the IDM. For the #1 injector, you may want to ohm the solenoid (should be around 2-3 ohms) and maybe see if the poppet screw under the solenoid is loose. Cheers!
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Old 06-19-2013, 10:35 AM
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loose poppet screw, bam, fixed. if only i got that lucky all the time!! 4mm socket ground a little tightened it right up!
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