Been a while since I visited. My 01 Ex with 70K is a garage queen always inside except for summer trips to some shows. I start and moved it weekly and all of sudden yesterday,; she does want to start. My warehouse is about 50-55 degrees and I'm cranking for 5-10 seconds before she will kick over. Once running she is her usual perfect self. From my reading and research at the forum....I'm thinking the GPCM could be bad. Here is the low down:
Hard starting.
Thrown no codes, which is puzzling.....
AutoTap reads 0 amps to both right and left glow plug banks, yet I'm not sure the parameter is properly measured by AutoTap software???
How do I find the GPCM and is there anyway of testing it? Is the the cylinder shaped relay looking gyzmo under the pass side of the fuel filer cover with four wires OR the longer rectangular bar module with two large plugs further to the rear on the pass side in the V-valley??
A map would be great and thoughts on the problem even better.
Thanks,
TOM
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2001 PSD Excursion Limited, 3.73LS - White/Beige, minus the roof rack crossmembers, Door Badged, Quad Pod - 4 Autometers (EGT, Eng Oil, Trans Oil, & Coolant Temps. on the A-pillar), Turbo Temp Monitor, Firestone Ride-Rite Rears, Edelbrook IAS Shocks, X-pel Light Protection, Weather-Tech Window Deflectors, Grill Guard, GoRhino Hitch Step, Bob Riley's Coolant Filter System, Magnefine Tranny Filter, Garmin Street Pilot III GPS. Fumoto Drain Valve, Gofia Bug Screen, Custom Built Wheel-less Trailer, XM Radio - Always detailed body, undercarriage, & engine.
I think you would get alot of help in the 7.3 forum. I am by no means an expert but I think only CA truck had the GPCM and everything else had a glow plug relay. Try searching the 7.3 forum
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1999.5 F-350 CC-SB - Just getting started on her...
2003 Excursion 4x4 - 7.3 liter - 80k on WVO
Veggie Oil Conversion - HOH, GFS Diesel Tank, Stock tank modified for veggie with Hotfox, Hydraforce Valves, FPHE, ARC filter wraps & twin FASS/DPP HPFP's. ITP Reg Return/fuel bowl delete, HPX, AIH, 6.0 IC & Tranny Cooler - Dieselsite 203 T-stat & Coolant Filter - CAT ELC - BTS Valve Body - AIS with fender mod - Dome light overide switch - MBRP 4" Turbo Back - Bully Dog 50HP "McClain Veggie Tune" Programmer - Full A pillar Trans,Pyr,Oil Pres,Engine Temp - Overhead Pod Fuel Press, Boost, Volt meter
I think you would get alot of help in the 7.3 forum. I am by no means an expert but I think only CA truck had the GPCM and everything else had a glow plug relay. Try searching the 7.3 forum
Ditto.
__________________ 2004 EB Excursion, 4x4, 6.0, Magnaflow Exhaust, Isspro Gauges in an under cubby pod, Fumoto, V code front springs, Revo 285's and bubba lights
"Treat me good, I'll treat you better; treat me bad, I'll treat you worse." - Sonny Barger
I would check the batteries and low furl pressure. even when it gets down to the 30's in Florida my X cranks rightup without waiting for the glow plugs
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2002 Excursion LTD(PCM:NQW5)Pheltech Tru-Cowl Induction Hood BTS transmission FASS and ITP fuel system, 38/15.5/20 Toyo's on Weld 12" wide wheels,15k warn and warn 9.5k rear 4:30s ARB air lockers front and Dana80 rear. Trail ready front bumper,Road Armor rear bumper light force driving lights, PIAA backup lights,Dakota digital gages, F5 DP tuner chip,Hypermax stage 2 injectors,4" exhaust, 11" Edge lift, King shocks, edge crossover steering, ORU ram assist steering
OneUp ladder bars,TN turbo, Dynatrac conversion kit. Alpine F1, Zapco amps. two dc1100.1, three dc1000.4, 1 dc750.2, driving seas reference series front stage and Zapco competition rear fill and 2 Jl audio 13w7 subs
AP Racing big brakes, Amp Research running boards
All excursions have the GPCM, at least all after a certain year. It is also installed on California pickups.
It is located on top of the motor to the right and back a bit from the fuel filter (at least on a 7.3). Its a silver box with a bunch of cooling fins on it. There are two large connectors on it.
If you are having problems check the connectors first, they may be bad. There are replacments available but you have to splice them in. You can buy a new GPCM onlike for about $130, don't buy if from the dealer for $220.
Do a google search for GPCM and you will find all the details.
My 03 7.3 X has the hard start problems, but I got a code (P0683) that told me either it was the GPCM or the PCM. I went for the GPCM and will be replacing it as soon as the unit arrives in the mail.
I just replaced my GPCM... it's a aluminum rectangular module with 2 huge multi plugs right to the back left of the fuel bowl. mine starts and runs great now.
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2001 Ford Excursion Limited 7.3 Turbonetics Ballbuster Turbo Spearco Intercooler AFE Stage 2 intake 4" Exhaust Stacked Tuners V code front leaf springs
I just replaced my GPCM... it's a aluminum rectangular module with 2 huge multi plugs right to the back left of the fuel bowl. mine starts and runs great now.
Where did you buy yours from and can i ask how much you payed? Thanks.
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2004 EB Excursion, 4x4, 6.0, Magnaflow Exhaust, Isspro Gauges in an under cubby pod, Fumoto, V code front springs, Revo 285's and bubba lights
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