Idle question...little different

[neverenough]

My car will idle and run fine until it warms up and I cut it off and try to restart it. When it starts it just stalls right out and when I give it gas it backfires through the intake. Then if I drive it down the road just a mile or 2 it will idle and run fine again. I have checked everything vacuum, reset idle, cleaned everything nothing helps. Also my car is very slow at the track. It slowed down after I put my new heads on (Holley). I have said heads trick flow stage 1 cam 77mm prom bullet, full length headers, ported and port matced factory intake everything else pretty much stock. If there are any idle gods out there please help!

 

[final5-0]

My car will idle and run fine until it warms up and I cut it off and try to restart it. When it starts it just stalls right out and when I give it gas it backfires through the intake. Then if I drive it down the road just a mile or 2 it will idle and run fine again. I have checked everything vacuum, reset idle, cleaned everything nothing helps. Also my car is very slow at the track. It slowed down after I put my new heads on (Holley). I have said heads trick flow stage 1 cam 77mm prom bullet, full length headers, ported and port matced factory intake everything else pretty much stock. If there are any idle gods out there please help!

Post number 2............Welcome to Stangnet

A quick tip for you that I think will get you more replies to your Q's is to build a sig and list all your mods in it. It is easier to see mods that way.

The back fire through the top sounds like the spark is way off so I would check that first.

Later
Grady