i have a 1995 z28 with the lt1. my car has a rough start if i dont give it gas then it dies and when i drive it the car overheats if i just idle. also when i first take off the car hesitates to go and it does it again around 40mph does anyone know what it could be someone said it could be a clogged cat.

 

Check engine lite lit?

 

ya it comes on and off but when it comes on the ac shuts off and only hot air comes out. also i had a mechanic check my cats and there fine

 

he also said that i have an electrical problem. the computer wont put out any codes. hes the car surges when i first go and he has no idea what it is so i have to take it to and electrical mechanic. i dont overheat any more.

 

The reason the scanner gets no codes is probably because the wrong scaner was used. Yous car needs a ABDI scanner but the connector is for OBDII, so a bastardized connecting cable is needed. Get the car scanned by someone that really knows about your car and take care of whatever codes are pulled first.