it sounds like your AFR gauge ,sensor is not working properly.?

is there an exhaust system on the car or open header ?

Last edited by csk; 08/23/17 09:26 PM.
1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5