North American Turbocoupe Organization



No voltage to coil
Fast44. Offline
Junior Member
#1
My 87 Coupe died in my shop. Car is bone stock. Ran fine, parked it, moved it around a few times and now a no start There is no spark. Had a spare brand new Autozoo module so I put it in hoping to have an easy fix. No difference. Not a fuel problem. Pressure at the rails, pump runs in tank. Did some probing. No fusable links blown. Voltage to red coil wire is about 1.5 and green wire is about 1.9. Neither will light the Snap-On test light with KOEO or flash when cranking. Everything else in the car works. I am thinking at this point ignition switch? EEC power relay? Defective Chinese garbage module?
Craig
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Not B Anymore Offline
Administrator
#2
There's some good info in the following post:
http://natomessageboard.com/cgi-bin/ulti...740#000004

Welcome to the Board!
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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Fast44. Offline
Junior Member
#3
Thanks B. I will check the fusible link under the dash first. If it's good, I'll try the jumper wire to + side of coil and see if there is spark. Do you have a wiring diagram of the ignition circuits?
Craig
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Not B Anymore Offline
Administrator
#4
I may have one and I can look tonight, but it would be for '86 and may differ from your '87. I know at least one or two other people on here have some diagrams for '87 or '88 so hopefully someone will chime in...
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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Fast44. Offline
Junior Member
#5
Well I spent most of my Sunday under the dash. After probing and testing upside down I found an open circuit in the R/LG wire from the ignition switch through the firewall. I soldered up a new 6 inches of #12 wire and now it starts and runs fine. Every thing works now except the secondary cooling fan. (Not related, it never worked before). Primary fan operates fine. Anybody ever jumped the two fans together? Too much draw on one circuit? I live in south Florida so if both fans run all the time, that's fine.
Craig
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Jeff K Offline
Administrator
#6
Running both fans in parallel off the same relay in the IRCM = burned up relay = new big $$ IRCM. If you have the original 75 amp alternator, running both fans constantly will seriously load the stock altonatorand likely pull down system voltage.

Are you sure there is a problem with the aux fan? It only runs when the coolant temp as measured by the PCM goes over about 220 deg or AC high side press exceeds 310 psi. I dont live in the heat of south FL, but I only saw my aux fan run once.... with the original clapped out radiator on a 100 deg day stuck in traffic. Since I upgraded the radiator years ago, it has never run.
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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EJ Offline
Member
#7
Jeff:

What Radiator did you upgrade to ?

I do not have any cooling issues since we brought he TC out of storage last summer - First day it was 97 and it hit 99 two day later - -Both fans perform under these conditions on our TC.
EJ

1988 TC - T5 Stock - Original Owner
1986 SVO - Original Owner-
2013 Fusion Titanium - Eco Boost AWD
2012 JEEP Liberty - Son's DD
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Jeff K Offline
Administrator
#8
I used a Summit branded Aluminum rad for FOX Mustangs. Only a few minor mods needed to the brackets to mount it up. The core is about twice as think as the stock core. Its a very heavy duty design.
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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