95 idling and running rough - Ford Powerstroke Diesel Forum
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post #1 of 16 Old 08-17-2006, 09:25 AM Thread Starter
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95 idling and running rough

I'm new to the forum, but have been lurking for awhile and learning alot from it.
I have a 95 Powerstroke F350 and it started running rough all of a sudden. It was running fine and getting about 17 mpg, until last week when I got in to go to work. The truck had a different sound idling, idling slower than normal and the engine sounded like it had a miss through all rpm's. I got home and found the passenger's side vc gasket and the internal and external glow plug pin were melted. I got a new vc gasket and both connectors from the International dealer and replaced them, thought my problem was fixed. However the truck is still running like it has a miss? I checked the ICP by unplugging it to see if the idle would smooth out, it didn't. Checked all of the wiring connectors and harness to CPS, IDM, injector harness, idle sensor on the peddle, etc., did not find anything wrong. The check engine light has not come on, but I reset the ECM after unplugging all the connectors by unhooking the battery for 10 min.
Fresh fuel filter, oil filter, new serp belt, K&N intake, new 3" downpipe w/ 4" straight exhaust, new Optima Yellowtops and battery clamps, etc., all done less than 500 miles ago, the truck was running perfect!
I really don't know where to check next? Can bad glowplugs make it run rough in the middle of summer?
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post #2 of 16 Old 08-17-2006, 10:08 AM
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to the Forum.
I'm thinking Marc will answer this one shortly.

2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel




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post #3 of 16 Old 08-17-2006, 04:52 PM
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did you check all four (one outside, one under at each connector) valve cover connectors on that side??? and have you pulled the other one just to inspect and make sure you didnt have anything goin on over there???

Glow plugs will not make a truck run rough after its started and has ran for more than a few minutes......
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post #4 of 16 Old 08-18-2006, 05:43 AM Thread Starter
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I actually replaced the vc gasket and all four connectors on the passenger side, just because I had the cover off and had to buy a kit of 6 connectors. The only pin that was burnt was the 1 forward most glowplug terminal on the pass. side. I checked all of the connectors with my Fluke meter and they all check out fine on both sides. I did not take off the driver's side valve cover, but the connectors and pins check out good.
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post #5 of 16 Old 08-18-2006, 06:26 AM
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any chance you have acess to a kill box to start checking injectors??
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post #6 of 16 Old 08-18-2006, 06:28 AM Thread Starter
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No I don't. Guess I'll have to shell out some cash to the dealer? I'm going to see if it's throwing any codes before I do that.
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post #7 of 16 Old 08-18-2006, 06:29 AM
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Quote:
Originally Posted by Bull
No I don't. Guess I'll have to shell out some cash to the dealer? I'm going to see if it's throwing any codes before I do that.
DEFINATELY check for codes.....
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post #8 of 16 Old 08-21-2006, 12:53 PM Thread Starter
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No codes showing up and the CEL has not come on. I removed the IPR and cleaned the return screen and ched the connections, it still has the same "miss". Not sure where to look next
The engine sounds differently throughout the rpm range and seems to "lope" more than it used to. The idle is still at 650, like it was, but it shakes the truck more when idling. Do you need a special type of gauge to check fuel pressure at the Schrader valve? What should the fuel pressure be, 55psi?
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post #9 of 16 Old 08-21-2006, 04:31 PM
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fuel pressure should be between 40 and 60 PSI or so roughly at the scrader valve, and no, you dont need any special tools.....just a standard fuel pressure gauge...

Just for kicks, have you looked down in the valley to see if maybe your lift pump is leaking fuel??
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post #10 of 16 Old 08-21-2006, 04:36 PM Thread Starter
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I did look at the lift pump and saw a very small amount of moisture in the valley, not a puddle or anything. I vacuumed the valley with a small nozzle on my shopvac, so I can see if there are any leaks. If the lift pump is leaking, would that cause what I described?
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