I just replaced the exhaust manifold on my 97 TJ 4.0. Whenever i start it now the engine just REVs like someone is stomping on the Gas. i'm not sure what would cause this but i ran into a couple other problems as i was putting everything back together that might be helpful in helping me figure this out.
When i put the power steering pump back on the bolts didn't line up through the bracket and into the intake manifold, so i had to unbolt the bracket from the block in order to get the power steering pump screwed into the intake manifold. then the serpentine belt would not fit around the power steering pump pulley, even when the idler pull/tensioner pulley was fully extended; i ended up having to use a pry bar to get the belt around the pulley and even then its still not completely on.
I'm assuming that when i put on the intake manifold i must've not seated it fully or correctly and that is somehow contributing to the immediate high acceleration when i start the engine. i've checked the accelerator cable and it's not stuck open at all, so i don't think that is the problem.
i'm hoping someone might know what i did wrong before i have to strip the whole thing down again. so any advice or ideas anyone could lend would be greatly appreciated.
oh, and using a torque wrench on those manifold bolts is practically impossible, i don't see how you're supposed to get a torque wrench in some of those tight fit spots.