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Member
Join Date: Sep 2009
Posts: 39
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IDM Code
Hello,
New to the forum here, but not to the ford diesel world. My truck is listed below in my sig and I apologize in advance for the long post!
'02 7.3L with 140k on the clock. Around 120k, I lost 3 injectors, had them replaced and life went on.
Recently, I've been seeing my CEL flicker on and off. Finally, it stayed on constantly. The truck runs PERFECT...no starting issues, smooth idle, plenty of power. Here is what is odd about the CEL...it will stay on at idle and during accelleration. However, when the TC is locked and I let off the go-pedal...it will shut off and remain that way until I step on it again (does not matter how hard) or the TC unlocks. This happens with my chip on/off, installed/uninstalled.
So, here is what I have done to try and pinpoint the problem.
1. Checked to ensure my chip is properly seated on the PCM.
2. Inspected all wires that go from the PCM & IDM to the main valve cover harness.
3. Checked all wiring harnesses that go to the transmission (thinking one might have been chafed)...but they seemed fine.
4. Had the codes pulled.
First Code was P1316...which I know all it means is that codes have been stored in the IDM. So I ran an injector buzz test, cylinder contribution test, glow plug relay etc. First time I did it, I got P1277 (Injector 7 high to low short) and P0284 and P0269 (cylinder 8 & 3 contribution faults).
Knowing that the UVC's are notorious for causing troubles, I decided that for $40 a piece from the IH dealer, it was not going to hurt anything to replace them. The ones I took off did not look messed up, but I wasnt about to put them back on. Jody at DP Tuner also pointed out that the grey CPS that was installed by Ford under the recall could be the culprit as well, so I replaced it with a BW one from O'rileys today. Still have the CEL illuminated.
This evening, I went and pulled codes/ran tests again, and consistenly got P1277. So my question is, what is wrong and why does the CEL shut off when I let off the gas...all while the truck still runs great?
Sorry for the long post, but im really looking forward to hearing your responses because it sounds like there is a great deal of info on here!
Jourdan
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Jourdan
2002 F250 Lariat 4x4, 7.3L
DIY Intake, Zoodad, 4 inch exhaust turbo to tip, DP Tuner F5 (no start, stock, high idle, 60hp tow, 80hp econo, 120 hp race), Isspro Gauges: egt, boost, tranny (thank you girlfriend!:hail), Dieselsite Coolant Filter, AIH Delete, HPX Line, in-tank & pre-pump mods, FPR shimmed to 70 psi, Hawk Brake Pads and Powerslot Rotors, Dieselsite WW, Rhino Bedliner, 285/75 Goodyear Wrangler Silent Armors, Trailer Tow Mirrors, Bilstein Shocks, 203* T-Stat, Dieselsite Billet T-Stat Housing, Door Seal Mod, Fumoto Oil Drain Valve, Passport 9500i hardwired in w/ smartcord, A toolbox full of goodies and a few other things here and there:sly
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