car surging

[smallblockFTW]

and stumbling BAD only when check engine light is on.. any help?

 

[Bonnewagon]

Wild guess-CCC carburetor acting up. Or O2 sensor or TBI sensor giving bad info and computer is trying to compensate with wild carb fluctuations. What code is showing?

 

[smallblockFTW]

Wild guess-CCC carburetor acting up. Or O2 sensor or TBI sensor giving bad info and computer is trying to compensate with wild carb fluctuations. What code is showing?

havnt run the codes yet, it got dark.i know i have the idle circut reallly rich so it would run without a choke in the winter.

 

[smallblockFTW]

okay, so i pulled the codes and i got mixture control solenoid, MAP sensor, EST circut, and lean exhaust... im so confused

 

[anakputa]

I would start by looking at the harness by the firewall, especially the connectors. Maybe brittle of corroded. Also if the main Battery cable are "loose" then they will need cleaning and tightening or have the "Green Wires from corrosion" they will need to be replaced. A "wiggle test" will find a lot of problems..

 

[smallblockFTW]

okay wiggle test(s) helped lol. turns out most of the clips on the plugs are broken 😳 so now i need to dial some timing into it and lower the idle. and all should be well, (hopefully) thanks for the help guys.