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Old 11-29-2008, 07:37 AM
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rough idle, just changed GP's

Hey guys,
Just changed my gp's no proplems with the installation and no wiring harness problems. Then I was tring to locate a fuel leak near the center of the engine near the fuel filter housing. I carefulley sprayed some degreeser and lightly sprayed water and cleaned the area to see what was going on. Today the truck is idling real rough, and I had 2 30 amp fuses blown. Which i replaced and have not blown out since replacing. The only place i lightly spayed was around the fuel filter housing, and valve cover. I am getting no codes. Any Ideas greatly apreciated. Also I did change the fuel filter. I assume i shorted something out?????? Thanks Guys the best site
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Old 11-29-2008, 07:53 AM
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rough idle 96 ps 200,000

Hey guys, also when I plug in the scanner the truck shuts off. I am just hopeing it will dry out, is there anything else to look at? The truck was running great before this, should have lived with the fuel slicks!!! Thank guys
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Old 11-29-2008, 03:33 PM
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when replacing fuel bowl o-rings on our '99 brush truck i soaked the thing with degreaser and water to clean the crap out and no problem. what fuses were blown? how bad is the leak? if fuel is coming OUT, water could go IN.

scanner killed my truck and the chief's so i dont think that has anything to do with this.

re check the wiring harness, a wire could be shorted or torn, the UVC harness gets REAL close to rocker arms which arent forgiving.
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Old 11-29-2008, 03:37 PM
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That's weird.

I've never shorted anything out on my truck cleaning the engine.

I just spray degreaser on everything, and then hose it all off.


I cover the alternator tho with a plastic bag.

I've never had any problems
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Old 11-30-2008, 05:53 PM
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did you crush any of the wires under the valve cover when putting it back on.Easy to do this may be an issue? Cause then if they are crushed on your valve cover id reckon theyd be grounding out
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Old 11-30-2008, 08:43 PM
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what fuses where blown? did it run rough before you changed your glowplugs?
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Old 12-01-2008, 10:06 AM
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Roghg idle 96 ps

Thanks for your replys guys. The truck was idling perfect before I changed the GP's on the passenger side. As everyone knows it is pretty tight reinstalling the VC's on the passenger side. After doing the GP's, I did wash the engine with a degreeser and lightly sprayed it to check for a fuel leak. So maybe I hit a wire. I actually did not remove vc completly off, just slid it down.
My question is, what would cause the rough idle at all speeds. The wires looked fine when I did the GP"S The engine really buckles and shakes at 40-50mph. Which it never did. Would a short do this? The water/degreeser was around the fuel bowl area.
What would be the best thing to do?
Thanks for all your resposes such a great help
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