High rev start-up?

[manch420]

How the hell do fix the high-rev start up?

 

Almost every time i start up my MJ it sounds like the throttle is pushed all the way to the

 

floor and the only thing i can do is shut it off and retry untill it idles normally.

[Eagle]

This is often caused by a dirty idle air controller (IAC). On my high-mileage 1988 XJ, I've found that another factor is corrosion in the throttle linkage. The cable from the gas peddle doesn't go directly to the throttle body -- it goes to a lever (bellcrank) on a pivot that's mounted down below the brake master cylinder, near the frame rail. I found that soaking that with PB Blaster, then following up with motor oil cured most of my fast start-up issues.

[ComancheKid45]

Also check all your Manifold bolts :wrench: