97 rough idle only when check engine light comes on - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 11-22-2013, 07:42 AM Thread Starter
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Unhappy 97 rough idle only when check engine light comes on

HI there hope you guys can help cause im gong nuts lol, I have a 97 that I have done the wiring harness on and the plugs and glo plugs truck starting running better replaced batteries truck starts great! Idles ok but does a searching mode thing is what I call it like going up and down not by much but does not do all the time, then I drove it all around did fine until the highway when I went on and was doing 65 for about 5 miles the check engine light comes on and the truck then starts to lose power and run rough, shut it off light goes out and the truck runs fine, took out the icp cleaned it off took the truck out ran great down the rode no light nothing then i hooked up my trailer went down the road first hill I came to light comes on truck runs like crap. not sure what else to check or how
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post #2 of 3 Old 12-21-2013, 09:13 PM
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Were you able to find a fix for this? Mine just started doing a similar thing. I start it up, it runs great, then all of a sudden starts idling very rough, CEL comes on, and then it clears up by itself in 10-15 seconds and runs fine. I'm stumped!

1995 F250 XLT 4x4 E40D

Current Mods: TW tuned, 3/8" trans. lines, BTS VB, Tru-Cool 40k cooler, 6637 Intake, 3" DP, 5" Aussies, Isspro EV2's, smoked tails/heads and 35w/5000k HID's, GM tow mirrors.
Future Mods:Rosewood Stage 2's, D66 with WW2, Intercooler, E-Fuel, T-500, SAS.

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post #3 of 3 Old 03-28-2015, 01:03 PM
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Did you find a fix?

My 95 with 160,000 miles on it just started doing this. Any guidance greatly appreciated.
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