North American Turbocoupe Organization



Fuel pump not shutting off
Pete D Offline
Administrator
#1
Had to replace the IRCM today because the primary fan stayed on, even with the key off.

I put in an untested used one. now it appears that the fuel pump runs all the time, if the key is ON.Can I assume the FP relay in the used IRCM is stuck closed? I did tap the IRCM to see if it would stop but it did not.

Anyone bought an new IRCM lately? Where? How much?



[This message has been edited by Pete D (edited 05-19-2004).]
Pete Dunham


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rairbird Offline
Senior Member
#2
Pete, look at the installation guide that came with your tuner. If I am not mistaken, the fuel pump issue is related to the Tuner. Check page 10 of the User guide.

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87 T/C, 5sp., Hardened Crank, Crower Sportsman Rods, J.E. full floating pistons, .030 over, Total Seal rings, Head and Main studs, Ported/Polished head, 1.89, 1.59 S.S Valves. Motorsport Lifters, A-234 cam, Fidanza Adj. cam sprocket, ported polished lower, gutted upper intake, Rod's S/S headers, 3" DP, T3/T04E 46, Gillis BCV, K&N Air Filter, Kirban Adj. FPR, Walbro 255 FP., 42# inj., EEC-Tuner. Still have to mount the GN I/C, and Forge BPV.
88 T/C stock, 5sp., Soon to be parted out.
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Jeff K Offline
Administrator
#3
If the FP runs all the time thekey is ON, but shuts off when the key is turned OFF, the problem is probably not the FP relay in the IRCM. Either an EEC problem (possible tuner relate, or the FP relay circuit from the IRCM to EEC (tan wire, I think) is shorted to ground. It is possible, but highly unlikely, that an internal short in the IRCM could cause this. If you put the original one back in (disconnect fan so you cant hear it), does the FP run all the time too?

New IRCM: Bought one about 2 years ago. Paid $120 at the local Ford dealer... OUCH! Since it is the same as usedin about a million Taurus ? Sable, etc, most dealers have them in stock.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 21 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 02 Taurus Vulcan(wifes car)
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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Pete D Offline
Administrator
#4
Rairbird, Thanks much for that tip. I did find the reference to that fact in the Users Guide today, after I saw you reply. I've been nable to upload files to the Tuner using a laptop and the PCMX software, via a USB-SERIAL adapter. Randy is telling me no one has ever got PCMX software to work with that adapter. Now is a fine time to tell me after I bought the laptop with no serial port [Image: frown.gif]

I'm going to pull the EEC out and check the tuner installation and then hook it up to a desktop with a "real" serial port so I can use the regular tuner software to check "firm ware" to see if it's the right version. Why was it shipped if it isn't???

Jeff thanks for the info. I'm not going to panic on the IRCM yet, given that it may very well be a EEC tuner related issue.
Pete Dunham


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turbocoupes Offline
Senior Member
#5
heres one...similar condition...but shut key off and remove ...pump still runs...close the opened driver door and pump stops...this hasn't happened for about 6 months...???

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Garry McVey Birdoprey always in flight... TBird TC owners are usually wingin' it
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Garry McVey "BIRDS OF A FEATHER" TBird TC owners are usually wingin' it
TC's 83 project, 86 donor for 83, 86 FUN street car daily driver with speed equipment from Red 88 donor, 87 blue to be stock street car, 87 red donor for blue and others, 87 red donor, 88 street and strip(now a donor) 14.01 chasin 13.0's, 87 XR4ti project,
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Jeff K Offline
Administrator
#6
Quote:Originally posted by turbocoupes:
heres one...similar condition...but shut key off and remove ...pump still runs...close the opened driver door and pump stops...this hasn't happened for about 6 months...???


Sticking relay? Maybe closing the door shakes the car enough to unstick the relay. Had a similar problem about 15 years ago in my 86 Tbird 5.0 that has the FP relay in the trunk. Sometimes the relay would stick on, but opening and slaming thetrunk shut would turn it off. New relay took care of the problem.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 21 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 02 Taurus Vulcan(wifes car)
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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Dan S Offline
Administrator
#7
Ford still stocks the IRCM. When I went through all the problems last year, I bought three before I found that retaining washer problem. The average price from the local dealers was around $98.00.

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Dan S
NATO Member
84 and 88 Turbo Coupes
It's no longer a hobby, now it's an osbession!
Dan S
Custom 88 TC, Mandarin Copper Pearl Metallic
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1972 Ford F-100 SWB Styleside
2015 Lincoln MKC 2.3 EcoBoost AWD
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