North American Turbocoupe Organization



Cruise control...Set it...and Forget it...NOT!
fiveliter8 Offline
Senior Member
#1
Well, I decided to try out the cruise control tonight and well, let's just say it doesn't like "cruise"! When I turn it on and hit the "set" button, it just accelerates till I turn it off or hit the brakes/clutch. Any clues? Sounds like a cruise control module problem.

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1988 Tcoupe
1984 20th Anniversary GT350 Mustang 'Vert
1984 Mustang GT T-roof
1965 Shelby Cobra Replica
www.stangnut.com
1988Tcoupe-ye will be missed
'09 Flex SEL
1984 20th Anniversary GT350 Mustang 'Vert
1984 Mustang GT T-roof
1965 Shelby Cobra Replica
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Jeff K Offline
Administrator
#2
Either the cruise amplifier or the servo... but you know that already. My guess would be a problem with the servo (in driver side fender). You can do some basic measurements on the servo from inside the car. Pull the 6 pin connector off the amplifier (left of steering wheel at firewall). Resistance of O/Y to GY/BK should be 40 to 125 ohms (vacuum solenoid), O/Y to W/PK should be 40 to 190 ohms (vac dump solenoid). You can also apply 12 V briefly to each and listen for a click from the servo in the fender. If these check out, measure oms from BR/LG to P/LB, should be 50,000 ohms. This is across the feedback pot that feeds back servo throttle position to the amplifier. Now the ballpark measurement.... P/LB to Y/R should be low ohms, like 1000 or so, very roughly. Y/R is the slider of the feedback pot.

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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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fiveliter8 Offline
Senior Member
#3
Hey all, just thought I'd post an update in case anyone else has the same issues. I found a amplifier out of an 89 'stang in my basement and threw it in. Works like a charm! Get this, intermittently the thing would also make my gas pedal go to the floor on it's own...talk about stains in my underwear. Man, now I'm running out of things to fix on her. [Image: biggrin.gif]

------------------
www.stangnut.com
1988 Tcoupe
1984 20th Anniversary GT350 Mustang 'Vert
1984 Mustang GT T-roof
1965 Shelby Cobra Replica
www.stangnut.com
1988Tcoupe-ye will be missed
'09 Flex SEL
1984 20th Anniversary GT350 Mustang 'Vert
1984 Mustang GT T-roof
1965 Shelby Cobra Replica
Reply





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