sierra 1.3 reving/electrical problem :\ im dumb-found

[suzuki lj80]

hey guys, went wheeling with Dano80 this arvo and found out that when I turn my head lights on, or my A/C on, my 1990 sierra revs up to 2500RPM, then back down to 1000, then back up to 2500 and back down and so on, till I turn the lights or A/C off, any of you guys know of how to solve this problem?

cheers

[supazuk]

the idle up thingo on the front of the carby will be cactus. start the motor, turn on the lights and have a look at
the front of the carby for the thingo that will be moving the throttle rod. cut the wire to it. fixed.

[suzuki lj80]

I undid the hose connected to that rod, and it stopped...thanks for your help mate

[MazdaSpater]

Wire it up to power from a switch so you have a throttle up, you can adjust the setting..
Handy when you dont want to drop back to 0% throttle when crawling etc.