95 with extremely rough idle and check engine light - Ford Powerstroke Diesel Forum
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Old 02-03-2014, 04:43 PM
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95 with extremely rough idle and check engine light

Not as urgent as some other's problems here, but I do need some help as I'm out of my league...

Couple of days ago I drove my truck across town, shut it down to do my stuff and when I came back out it stumbled to life and a bit of cranking, not excessive, just more than normal and it idled like absolute crap. Almost like it was missing a cylinder. I've got a TS tuner, stays in stock or economy 99% of the time and the idle was smoothest in the economy setting.

My buddy suggested unplugged the injector harness one at a time to see if there was any difference in the way it ran - didn't change anything. It's running rough enough that I'm not sure it's going to start every time I get in the truck and I'm worried about breaking it really bad. It does feel like the engine is de-fueling at anything past 1/2 throttle or 2k rpms so it's hard to get out of my own way on the road.

Does anyone have a code reader around the Oceanside, CA area so that I can find out what is going on or have any ideas of something else I can check? There were ZERO problems before this happened.

I did plan on doing a rebuild since it's at 322k miles but the place I was going to have it done at is 300 miles away otherwise I would just drive it there.
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Old 02-05-2014, 05:55 PM
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The problem is still going on but now my fuel mileage has plummeted to about 8mpg from 14, accelerates even slower, shudders even more at idle and now it has started stalling out on me when I'm at partial throttle at slow speeds. Can anyone help?
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Old 03-08-2014, 09:26 AM
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Solved the problem guys, my really rough idle turned out to be cylinders shutting down to rebalance the engine due to high ICP. High ICP was due to a faulty HPOP gauge pigtail. Unplugged, worked like new (ish...).

I have an ISSPRO HPOP gauge which has a simple pigtail to plug in that just fried. On the other hand, all of my GlowShift gauges are still working with zero problems. For all the Glow **** hatters, I will agree that the gauge readings are slightly off, but it's not really much. For example, my boost gauge reads 16.0 when its actually 15.6 or trans temp that reads 3 degrees high.

Thanks to Ron Gilmore for identifying my problem just by hearing my drive up in his driveway!
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Old 07-29-2014, 12:42 PM
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John, the symptoms you are having sounds just like what I saw yesterday.
sounds like a simple fix... but going to a Ford store they may really screw me.
Am going to suggest this as a possible to them.. citing the powerstroke.com community..
Thanks
Dennis/WB6UHQ
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