Scan Master Numbers

1buick

Member
Joined
Jul 16, 2006
When i first get into full trottle my scanmaster #'s through first and second gear are really low down to the 400's and then at the top of 3rd gear they go up into the mid to upper 700's. Is this normal? Are the numbers at the top of 3rd gear the only ones I should be concerned about? Is so what if I am running the 1/8th mile and don't get to the top of 3rd gear?
 
Sounds like a bad O2 sensor.

AC Delco AFS20 will fix your issue.
 
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