opinions please!
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Fleet Owner
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From: AZ
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Fleet Owner
Joined: Aug 2004
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Likes: 197
From: AZ
Boil your brain or freeze your *****? lol When I work on the truck I put up a umbrella if the wind isn't blowing hard! The truck must not like the Maaco paint job or the new tires I bought?
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Fleet Owner
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From: AZ
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Fleet Owner
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From: AZ
Put my spare PCM in, no change. Smoke was pouring out and running rough. I thought what the hell, I'll take it around the block. Two blocks from home with my foot heavy on the gas it started running good again. That's the second time its done that. So I did a cyc test on my scan gauge, it passed. I did a buzz test and came back with two codes that I got before, p0267 (injector current low cyc #3) and p1298 (IDM failure). Its hard for me to believe that both my IDM's are acting up. When its running good I also did the shake test on the wire harness and VC plugs, it didn't hesitate and kept running smooth. I'm going to leave it alone until Monday when I get my VC pigtail for testing. I'm wondering if my problem is cyc #3? But like I said before, even with one injector out it should not have acted that bad.
Or, after thinking about it for a while, I think I've read that if the IDM senses a short or problem it will shut down that bank. Maybe that's what's going on?
Or, after thinking about it for a while, I think I've read that if the IDM senses a short or problem it will shut down that bank. Maybe that's what's going on?
Last edited by oldbird1965; Mar 21, 2026 at 03:42 PM.
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From: evansville in
I'll try that tomorrow Knottyrope, I'll unplug the injectors.
Hi Aaron, I did swap the spare IDM in and it acted the same. I have not tried the spare PCM yet though. I'll put that harness back together and try again tomorrow. Its only 105* down here now, way to early for that kind of heat! The truck has 185K on it but the motor is about 50K. Thanks Aaron!
Hi Aaron, I did swap the spare IDM in and it acted the same. I have not tried the spare PCM yet though. I'll put that harness back together and try again tomorrow. Its only 105* down here now, way to early for that kind of heat! The truck has 185K on it but the motor is about 50K. Thanks Aaron!
105..ugg I heard about the record heat.
Maybe it is in VC adjacent. Dang,I hoped to not have to get in there.
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Joined: Dec 2005
Posts: 14,375
Likes: 604
From: evansville in
I'll try that tomorrow Knottyrope, I'll unplug the injectors.
Hi Aaron, I did swap the spare IDM in and it acted the same. I have not tried the spare PCM yet though. I'll put that harness back together and try again tomorrow. Its only 105* down here now, way to early for that kind of heat! The truck has 185K on it but the motor is about 50K. Thanks Aaron!
Hi Aaron, I did swap the spare IDM in and it acted the same. I have not tried the spare PCM yet though. I'll put that harness back together and try again tomorrow. Its only 105* down here now, way to early for that kind of heat! The truck has 185K on it but the motor is about 50K. Thanks Aaron!
105..ugg I heard about the record heat.
Maybe it is in VC adjacent. Dang,I hoped to not have to get in there.
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Fleet Owner
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From: AZ
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From: Plankinton, SD
Hey Glenn. When you say the times its running good are you sure its not running on 7 and not 8 but seems ok since you've had it running so poorly? Maybe it came unplugged and is shorting, or maybe it is still plugged in and has an issue and is hitting on all 8 when ok. My guess is you have a wiring issue with that one injector causing an occasional short, #3 right? Then the idm is shutting down that bank. I'd say its time to pull the valve cover.
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From: AZ
Hi Darin, that's my next move. I'm real sure it running on eight when its 'running good'. I'm putting it off for two reasons, one is this heat and the other is Thur I need to take my 5er in for warranty work. Its only two miles down the street but would really like to keep that appointment. Anyway, thanks for posting and I hope your doing good!
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From: AZ
It was a cool 98* today so I couldn't help myself and dove into the passenger side VC. That back bolt is such a bitch, any way didn't find anything obvious, #3 was plugged in just like the rest of them. By that time my brain was boiling so I came inside. I did get the VC gasket off, its OK. Almost dropped my half of a quarter that I put in there to keep it from unplugging, forgot about that. Tomorrow I'll take off the wiring and see if I can find anything wrong with it. Thanks guys for letting me journal this and bounce this stuff off of you guys!
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From: AZ
Today I pulled the wire harness out on the passenger side. There is no evidence of any broken wires, I checked continuity of all the wires and didn't find anything wrong. I cut one of the injector plugs off and plugged it into all four injectors and every one of the injectors ohmed out at 3.2. I also pulled the top of injector #3 off and checked the armature plate to see if it was loose, it was OK. Tomorrow I'm going out early and put it back together and see what I've got. I forgot to ohm the GP's, I'll do that before the VC goes back on, I've got some spare GP somewhere.