hey everyone, i have just installed my new str throttle body on my 94 ls...now, my car is messed up...here's the wierd situation: when i 1st installed it, i faced the gasket between the manifold and throttle body in the wrong direction, but my car started fine, just air leaks where the gasket was placed wrongly on. when i fixed the gasket, my car, when it's cold, won't start up properly..it'll start(rpm jumps to 1k) then it'll die (rpm slowly drop to 0). the only way i'm able to drive it is to step on the gas pedal right before it drops to 0 and manually rev it at 1500 like it used to on cold starts. wait for it to warm alittle and go. messed with tps, no differnce. thanks for any help.

 

make sure you tps is set properly.

i forget the voltage reading you are suppose to have at wot, and at idle

 

It should read around 4 volts at WOT, I don't know about idle. Check your idle air screw and throttle cable.

 

You may have ruined the gasket even worse then what it was like when it was on improperly. When I had a leak in the im I had a similar problem with the rpm's.

 

throttle position sensor is the first thing that jumps into my head. make sure it is plugged in. then you should test the voltage coming out of it. less than 1 volt at closed throttle, and over 4 volts a WOT. and it is alot easier to do this when the key is on and engine off.