Well my car's idle is very inconsistent. It has a newly rebuilt Rochester QJet. Sometime the car will idle just fine when i start it up in park and when i'm driving in gear, but then when i go to park it, and put it in park from drive, then the rpms will hop up to around 1500, and when i shut it off it'll diesel. Other times it will idle around-below 500, and it'll die if i don't keep givin it gas. I checked the timing and it was jumping around a lot, but it was at 4 and i set it at 6, then tried 8, still to no change. One of my buddies said that I may have lost compression. Any ideas guys?

 

Is it a computer controlled Q jet? How bout the distributer?

 

yea i think its a Computer Controlled QJet and i have a Accell HEI Ignition Coil. Is that the info you need?

 

that very same thime happened last week to my 86 T/A,
possible electric metering system in carb is not working correct, check electrial wireing to carb and metering system in carb if that does not work......this is a possible solution.....what was the reason for the new carb?