Cruise control tried to kill me!

Booksix

New Member
Dec 8, 2003
179
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San Diego, CA
Ok, so it's about 7 years after the 5.0 swap in my Turbo Coupe. Cruise never worked after the motor swap until one day last spring, on a road trip from WI to CA, I pulled up on the clutch pedal with my foot (89 mustang pedal assembly, must have a weird notch that keeps the pedal from using the full travel) and turned on the cruise no problem. So I use it for the next 3-4 hrs when suddenly it grabs the throttle... 80...off button....90...brakes, BRAKES HARD...100...110...kill ignition, coast to a stop.

Ok, so I got the car stopped... But when I refire, the engine revs sky high... still grabbing. So I pull off the cable and continue with no cruise. Next day, reconnect, use cruise for 3-4 hrs... grabs, kill the motor.

So basically, it just grabs the accelerator and nothing will kill it... Not the off button, not the brake pedal, not the clutch pedal, not even turning the key to off!! To me, it doesn't sound electrical... so perhaps the servo is just bad, getting stuck somehow... I don't mind replacing parts but how can I test or be sure without just driving in the crazy CA traffic and waiting for it to happen again? Any ideas?
 
yeah, that's ok.... I still appreciate the response. It is pretty funny! It was me and my two older brothers on a road trip to Vegas and CA. We built the car from a shell the ten days before leaving (finishing it at 2:30 am the day we left) and that included the new 13" cobra braking system... and let me tell you, it was a good test, but those monsters didn't do much against the motor... LOL, it was a little scary for a second but at least it wasn't in major traffic... it was somewhere in the middle of nowhere...