Hey guys,
I recently had boughten a 1972 demon 340 coupe. It has the blue print 408 stroker.
Keith black forged pistons
Hughes 4248S cam
Scat cast crank
Melling High volume oil pump
Aluminum edelbrock performer heads
Ceramic TTI headers with 3” TTI exhaust
Edelbrock air gap intake
Holley sniper efi.
It ran absolutely perfect when I bought it, insane throttle response tons of power. Now the issues are it’s having trouble meeting the target air fuel ratio on the controller. (Efi issues I know) and then when idleing the engine shakes bad. I have tried having the idle anywhere from 800-1000 to try and correct it and it still shakes bad. But settles down when cruising. Any one have any advice. Definatly scrapping the Holley sniper and getting a Holley 750 dbl as I can’t seem to figure out the afr issues with it. Holley tech seems to think it’s wiring but the thing is absolutely clean and have checked all wiring multiple times.
