AF on Scanmaster

[tylerside]

What should AF be when idling warm? Also IAC should be like 20-25?

Thanks Tyler.

PS what has been most common problem to result in code 42?

 

[bmackinnon]

Idling AF (air flow) should be 4-6 g/s.... (unless you have extender chip, if so, half that)...

20-25 IAC is fine...

You would probably benefit by doing some reading/learning here:
Vortex Turbo Buick Performance
Click on 'Scan Tool Usage' for alot of helpful information...


Code 42 is typically a failing ignition module.... although it can also be caused by chip/ecm issues as well...

Malfunction Codes Reference

hope that helps!