I have a 1989 Iroc 5.7 and it starts fine when cold, but one it runs a while it will not start without pushing the accelerator to the floor till it fires. One it starts it runs rough and sooty smoke come from the tail pipes. I have changed the fuel filter and checked the convertor. What is the problem??? Help me please. Thanks

 

beg, borrow , whatever a scan tool, see what the coolant temp sensor reads when its hot, if not correct, unplug sensor, should read -40_IIRC), then jump the pins , should read really hot, if good...........

next, pull the vacuum line off the FPR, should be dry, no fuel in it, if wey, you need a new regulator diaphram, if good..........

next, you may have leaking injectors, these are harder to diag, since you need to pull the upper intake off, post back if needed

 

A similar experience I had:

http://web.camaross.com/forums/showt...light=flooding

 

Yea just get rid of that junker and get you a real camaro ( like maybe a 68 camaro with silver strips )


Hey angel71rs may have something with that ECM thing

Have you pulled the plugs yet and replaced them ????

Next time I am over we should tap on that ECM a little

 

Check your IAC valve, it may be stuck closed. That is where the engine gets its air at an idle cause the throttle blades are closed.