North American Turbocoupe Organization



odd ignition condition
wrightsvo Offline
Member
#1
with the spout disconnected and timing light connected, everything acts as it should.
With the spout in,however, when any throttle is added, there is a sporadic skip in the timing light. It does the same with the timing light clamped on the coil wire.
Please advise /inform.
1988 ASC McLaren
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Not B Anymore Offline
Administrator
#2
Does it not run right or is it just the timing light that's skipping?
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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wrightsvo Offline
Member
#3
It has a random slight miss under acceleration. That is how I got to find this.
1988 ASC McLaren
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Jeff K Offline
Administrator
#4
Possible failing TFI. Do you have a spare TFI, or a whole spare distributor you can try?
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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wrightsvo Offline
Member
#5
I do not. I came here hoping to find a recommendation before I started randomly throwing money at it. I suppose the TFI would be the best One to start with?
1988 ASC McLaren
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wrightsvo Offline
Member
#6
Also...my TFI has been relocated off of the distributor.
1988 ASC McLaren
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wrightsvo Offline
Member
#7
Installed known good working distributor with tfi. Also installed known working coil. Condition persists.
Is the ECU a possible culprit?
1988 ASC McLaren
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wrightsvo Offline
Member
#8
Or any other ideas?
1988 ASC McLaren
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Pete D Offline
Administrator
#9
Could be a lot of things. Have you pulled the codes? How fresh or old is the tuneup and what brand parts used? Are the plug wires crossed in the loom? Cracks in the dist cap?
Pete Dunham


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Jeff K Offline
Administrator
#10
Check the harness between the TFI and the PCM for damage, and to be sure the foil like shielding is in place. Also be sure the SPOUT connector terminals are clean and the connection is tight. It is possible this is a PCM problem, but, IMO, this is unlikely.

Does the timing jump around at idle? It should.
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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