okay so i have a 91 firebird it takes a bit to start it but when u let off the gas an come to a stop it wants to stall any ideas on what i should do to eliminate this or what it could be Thanks in advanced

 

First check the Idle Air Control valve is working and the air passages are clean. Then.....

 

clean both about three days ago and just put the air box back in after painting it but this problem was their be4 i painted it i have new plugs and wires new coil oil change my cat is being replaced next week tho... soo i dont know im gonna try to do some of the grounds today

 

Then you'll just need to work your way through all the usual stuff. Grounds, sensors, egr stuck open, fuel pressure etc. etc. All the way to the injectors.

 

ok when i hit the brakes the car dips the revs higher can u give me around about idea of all the ground