North American Turbocoupe Organization



ircm
Sal Offline
Junior Member
#1
Is there a guide to deleteing the ircm?
I want to wire up individual relays, my ircm is no good. When I turn the key to the on position, both fans become engaged. And the car won't start due to no fuel. I have checked the fuel pump, so the problem is the ircm.

Thanks
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Not B Anymore Offline
Administrator
#2
Have you done a KOEO scan? I seem to recall this being a sign of a bad PCM and not the IRCM.
Brian Leavitt
'86 TC 5-Speed -- MS2x w/COP | 83 lb. injectors | T3/T4 50 Trim Stage 3 .63AR | Full 3" Exhaust - No Cat | Motorsport FMIC | Ranger Roller | Ported E6 | Walbro 255HP | Kirban | 20psi | 120-amp 3G | 8.8" 3.55 rear | '03 Cobra Wheels
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Jeff K Offline
Administrator
#3
^^^ +1

Fans always on and either no fuel pump run or pump always runs is almost always a bad PCM. No codes being outputted during KOEO / KOER self test is also a sign of a fried PCM.
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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Sal Offline
Junior Member
#4
Every now and then, It doesn't start due to the fuel pump not engaging. When this happens I can hear the fans turn on. I tried getting codes during KOEO, but like you said, no codes.

So my pcm is malfunctioning?
Should I stop driving it?

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Jeff K Offline
Administrator
#5
Sounds like a bad PCM. Take the PCM apart and have a look. There are electrolytic capacitors on the circuit board that often go bad... you can tell by looking at them (goo squirting out the bottom). If you know how to solder reasonably well, you can replace the damaged cap or caps.
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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BJL Offline
Moderator
#6
my ECC dies in my tbird this past year. had no CEL fans on and ,no start.
one of the capacitors fried and smoked..
http://natomessageboard.com/ubbthreads.p...Post235165
Brian J Larkin
88TC 320k miles
T3, FMIC ,3in stinger exhaust, gillis,
255 walbro, afpr, 5spd swap,spec clutch, sn95 5 lug,.
89 Cougar XR7 3.8SC Auto
95 Ranger Splash 3.0 auto
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