North American Turbocoupe Organization



Compression Test Question
John B Offline
Member
#1
Hey everyone, I'm going to do a compression test on my 88. I have no reason to believe that anything is wrong but I haven't done it yet so I'm curious to know the health of the motor. My question is, what is the best way to stop the fuel? There is no fuel pump "fuse". Should I just disconnect the fuel pump inertia switch? Thanks!
88 Turbo Coupe: Front mount intercooler, remote mount TFI, MGW short throw shifter... murdered out
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Jeff K Offline
Administrator
#2
Just keep the key off and use a wire with a momentary switch in it from the batt positive terminal to the small push on terminal on the starter solenoid on the driver side fender. Any switch and even 18 AWG wire will work fine as this circuit only draws a few Amps.
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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John B Offline
Member
#3
[quote=Jeff K]Just keep the key off and use a wire with a momentary switch in it from the batt positive terminal to the small push on terminal on the starter solenoid on the driver side fender. Any switch and even 18 AWG wire will work fine as this circuit only draws a few Amps. [/quote

My battery has been relocated to the trunk. Could I just jump the battery terminal on the starter solenoid to the starter terminal with the wire and switch?
88 Turbo Coupe: Front mount intercooler, remote mount TFI, MGW short throw shifter... murdered out
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B Offline
Administrator
#4
If you floor the pedal while you're cranking, it's supposed to go into flood clear mode and prevent the injectors from firing. To be absolutely safe, you can just unplug the injector harness by the fuel rail.
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
#5
That shouldwork.
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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