Truck does something weird- sometimes...
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Postmaster
Joined: Dec 2003
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From: Honkytonkville
Truck does something weird- sometimes...
Ok so sometimes my 96 will start running like crap, for about 10 seconds.....and this almost always happens at idle. Only happened once or twice going down the road. It only occurs sporatically and it's not overly often, but it seems to be getting more often. It almost sounds like the engine instantaneously quits on about half the cylinders, and then comes back after a short while. It's not loping or anything organized, just like it's not hitting on all the cylinders. The check engine light comes on only while it's lugging, then quits as soon the engine stops acting up. Any idears? I'd rather not just throw parts at it, but if someone's got an educated guess I'd sure give it try.
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
you have a wiring issue to the injectors. Check the connectors at the VC for burned plastic. Also test the UVC how I describe in this thread
https://www.ford-trucks.com/forums/6...=1#post5286089
Also check the main engine harness where it comes over the drivers side valve cover for rubbed though wires. If you can get the truck scanned that will tell you which cylinder(s) are having the issue.
https://www.ford-trucks.com/forums/6...=1#post5286089
Also check the main engine harness where it comes over the drivers side valve cover for rubbed though wires. If you can get the truck scanned that will tell you which cylinder(s) are having the issue.
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Postmaster
Joined: Dec 2003
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From: Honkytonkville
ok so assuming this is my problem how difficult is changing the valve cover gaskets? And should I be doing glowplugs while im in there since this thing won't hardly start below 32*. I'm at 269k miles.
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Post Fiend
Joined: Apr 2004
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From: Silver Lake Dunes, MI
VC gaskets are easy. Just once you get the VC off unplug everything and replace. Test the GP's as stated in the thread as well. that will tell you if they need to be replace or could also have wiring problems to the GP's. Ohm meter testing will at least tell you if the VC's need to come off. BUT the intermittent problem could be an issue with testing
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Thread Starter
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Postmaster
Joined: Dec 2003
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From: Honkytonkville
wow you guys are quick tonight lol....and that is crazy....that's why these motors look so clean under the hood LOL. Got a couple good places to start I will look tomorrow thanks guys.
Fleet Owner
Joined: Aug 2004
Posts: 20,418
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From: AZ
When I had this problem and when I was checking the pins in the VC plug-ins, I could not tell that I had a burned pin. Maybe my 'old' eyes aren't that good but I had to use a magifine glass to see it. Sure enough, there it was!
Post Fiend
Joined: Mar 2007
Posts: 9,010
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From: Johnson City, TN.
I might even guess IDM? Usually they are good or bad but I have heard of them "acting up" on the way out.
I see you have a couple of trucks with 7.3's. You could take one out of the other and see if that fixes your problem.
The IDM is on the drivers side inner fender under the hood hinge. It drives the injectors.
I see you have a couple of trucks with 7.3's. You could take one out of the other and see if that fixes your problem.
The IDM is on the drivers side inner fender under the hood hinge. It drives the injectors.
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
If the pin is burned on the gasket you just replace the gasket. if its the engine wiring harness that is burned there are repair kits for that as well.