North American Turbocoupe Organization



Electronic Gremlin (long post)
Dan S Offline
Administrator
#1
This all started while I was driving my 88 home from work and "poof" it died! Checked it all over and found no spark. The root of the problem was a 20 guage fusible link (I got the idea from the search area) and a lot of help from Pete D and Jeff K. Next was the seven blade fan wouldn't shut off. I've gone through 3 used IRCM's and one brand new one, "fan still runs." Tonight after disconnecting the drivers side fan, I parked the car for the night, only to hear the fuel pump running, but the "keys" were in my hand!
Well, I disconnected the battery and now I'm here on the computer looking for answers. Also, does anyone have a gremlin trap, I think I need one?

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Dan S
NATO Member
84 and 88 Turbo Coupes
(87 TC parts car)
It's no longer a hobby, now it's an osbession!
Dan S
Custom 88 TC, Mandarin Copper Pearl Metallic
http://natomessageboard.com/ubbthreads.p...5#comments
1972 Ford F-100 SWB Styleside
2015 Lincoln MKC 2.3 EcoBoost AWD
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Dan E Offline
Posting Freak
#2
I'd suspect the IRCM however you've eliminated that I see ???? But it seems to be the common thread for the Fans and Pump.

I don't know what circuit would always be hot with the key off that would cause the FP to run ??? Maybe the FP relay was fused shut ?

I think this qualifies as a WTF ?

Lot's of help I gave you huh ????

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Dan Eaves
88TC 5spd, Crower 5.5" Sportsman Rods, Short Wiseco Pistons bored .030" Over, Ported Head with Polished Combustion Chambers, Gutted & Polished Upper, Ported & Polished Lower, Polished T/B, Ported E6, SVO T3 .63AR Turbo, Bosch Bypass Valve, 3" DP w/No Cat, 2 1/2" DynoMax single cat back w/DynoMax Super Turbo Muffler, RR Cam, K&N in Fenderwell, Gillis Boost Valve, Centerforce I Clutch, Removed A/C, Polished Wheels, Polished Valve Cover, Polished Crank and W/P Pulleys, Walbro 255LPH HP Pump, Kirban Adj FPR, and the DAMN Heater Core is new too !

NATO MEMBER (Vice Chairman...if it's a vice...I deal with it)

[This message has been edited by Dan E (edited 04-23-2003).]
Dan Eaves
88TC 5spd Vermillion Red, Polished...everything...
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Dan S Offline
Administrator
#3
[QUOTE]I think this qualifies as a WTF ?

Lot's of help I gave you huh ????

Dan E, since we have the oldest brewery in the country, I'll bring a couple of cases to Carlisle, so we can figure this mess out!

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Dan S
NATO Member
84 and 88 Turbo Coupes
(87 TC parts car)
It's no longer a hobby, now it's an osbession!
Dan S
Custom 88 TC, Mandarin Copper Pearl Metallic
http://natomessageboard.com/ubbthreads.p...5#comments
1972 Ford F-100 SWB Styleside
2015 Lincoln MKC 2.3 EcoBoost AWD
Reply

B_Lieder Offline
Senior Member
#4
Looking through my eec book. It says that the fuel pump runs when it sees an

ignition-on signal,
crank signal from the ignition switch,
a PIP signal from the hall effect,

If the PIP siganal falls below 120 rpm, the control module cuts off the signal to the fuel pump relay.

You may have already tried this but your ignition switch could be on its way out. Have you switched back to the original ircm. Since it didn;t do this (fuel pump) on the other ircms, maybe you got a lemon. As for the cooling situation, i don't have any idea, i'm still trying to get my cooling fans to work properly.

Look at the bright side though. At least your fans run..........

Good Luck

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Bill Lieder
1988 TC stock until summer
Bill L
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Pete D Offline
Administrator
#5
Maybe if we switch the fans from Bill's car to Dans and vise versa, both car will work right.


I'm a big help aren't I guys? [Image: biggrin.gif]
Pete Dunham


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B_Lieder Offline
Senior Member
#6
Sounds like a plan to me.

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Bill Lieder
1988 TC stock until summer
Bill L
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Jeff K Offline
Administrator
#7
What shape is the ignition switch in? If it is of unknown age / condition, I would replace it. Cheap and easy to do, and even if it doesnt solve the problem (I have a feeling it might), it is probably due for replacement anyway.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 20 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
#8
[QUOTE]Originally posted by Jeff K:
[B]What shape is the ignition switch in? If it is of unknown age / condition, I would replace it. Cheap and easy to do, and even if it doesnt solve the problem (I have a feeling it might), it is probably due for replacement anyway.

Jeff, I was thinking the same thing, but I replaced the switch again today, thinking I got a bad one off the shelf (made in Mexico).
There is a little evidence that something is hot down stream from the switch. The terminal connector where it connects to terminal A2 in the ignition switch, shows evidence that it had been very warm (started to melt). I suspect that there may be a serious problem somewhere between the switch and the fusible link down stream. What's your thought?

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Dan S
NATO Member
84 and 88 Turbo Coupes
(87 TC parts car)
It's no longer a hobby, now it's an osbession!
Dan S
Custom 88 TC, Mandarin Copper Pearl Metallic
http://natomessageboard.com/ubbthreads.p...5#comments
1972 Ford F-100 SWB Styleside
2015 Lincoln MKC 2.3 EcoBoost AWD
Reply

Dan S Offline
Administrator
#9
Well I think I'm on the right track, but I need some help from a wiring diagram. Where do wires 687 GY/Y (12) D and 687H GY/Y (12) D, go from the ignition switch? What do they control? The original switch I removed from the steering column indicates some signs of heat on those terminal (A2) lugs.

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Dan S
NATO Member
84 and 88 Turbo Coupes
(87 TC parts car)
It's no longer a hobby, now it's an osbession!
Dan S
Custom 88 TC, Mandarin Copper Pearl Metallic
http://natomessageboard.com/ubbthreads.p...5#comments
1972 Ford F-100 SWB Styleside
2015 Lincoln MKC 2.3 EcoBoost AWD
Reply

Pete D Offline
Administrator
#10
i see 1 gy/y 687 becomes the resistance wire to thr IVR.
Another goes to fuse link N and on to ABS system and the 02 sensor.

another to fuses 5 and 17 in the panel

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NATO Member. it's not a vice, it's an obsession
Good judgement comes from bad experience, and a lot of that comes from bad judgment.
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Pete Dunham


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