94 caprice stalling and idling problems

i have a 94 caprice classice 5.7 lt1 police package hade a tune up and had k&n air system put in bbk 58mm throttle body after i put in the throttle body i had idling problems now i put in new headers and complete exhaust system done and now its shutting off while the car is sitting but fine on the highway what can it be.

i have a 94 caprice classice 5.7 lt1 police package hade a tune up and had k&n air system put in bbk 58mm throttle body after i put in the throttle body i had idling problems now i put in new headers and complete exhaust system done and now its shutting off while the car is sitting but fine on the highway what can it be.

Despite what they might tell you, grammar actually is very important in the online world! If you want people to really answer you, then take the time to punctuate, and form sentences that don't collide.

Check your gasket for your throttle body, and check any vacuum lines for leaks.

my data link connector where i hook the diagnostic computer to has no current so i cant get the check engine codes what can it be

my data link connector where i hook the diagnostic computer to has no current so i cant get the check engine codes what can it be

Dude, re-read my post above, I gave you something to look at. I can't help you if you don't read what I write!

my data link connector where i hook the diagnostic computer to has no current so i cant get the check engine codes what can it be
Check the cigar liter fuse.