Today I was replacing my exhaust manifold, engine mounts, valve cover gasket and was going to change my oil but for some reason when i start my 94 xj it goes to wide open throttle and I have to shut it off. Has anyone had this issue or have any ideas?

 

check the throttle plate, is it wide open before you start the car?

 

check your throttle body and all that your cable might be stuck some where look around you will find it

 

also check throttle cable mine did this it broke and away i went

 

Throttle cable is good and plate is closed.

 

big vacuum leak?idle air control motor stuck wide open

 

You said you replaced your exhaust manifold. Did you get a new gasket? If so was it the correct gasket? You may have accidently installed the gasket wrong or gotten the older style. If im not mistaken the older renix manifold gasket ports wont line up correctly. I may be wrong but its a start.

 

bad vcuum ,leak ,possible ,here

 

I bought it off EBAY and it was listed for 91-95 cherokees, is there any way to tell if this is the wrong gasket without pulling the intake off?

 

Not really I wouldn't think so. If you don't have any vacuum lines off then id say the intake isn't seated properly. Did you have the fuel rail off the intake? You may have a fuel injector o-ring missing where they go into the intake.

 

cover throttle body with hand start motor if it still run its got a bad leak spray carb cleaner around intake bolts note idle see if it changes theres you leak

 

I did take the fuel rail off, inspected all orings and lubed before putting back in, I have unplugged each injector 1 at a time to see if its a bad injector and this changed nothing so I dont think its injectors. I looked at the gasket when I put it on and everything seemed to line up great. I will try the hand over throttle body later. I would love to use the starting fluid method but like I said as soon as it starts it accelerates to wot and I have to imediatly kill the motor. Its snowing today and cold as the poles. Thanks for all your help guys.

 

When I changed the IAC in my 97, it revved like hell for a bit until the new IAC took it's correct set.

 

teejay64,

you have cruise control on your model?

if so, disconnect the speed control module under the lower dash panel, not the intermittent wiper module the speed control module.....

then start the jeep. if it no longer goes to WOT then replace your speed control module.


just a suggestion


cpnwrench