A/F Ratio
Thread Starter
On The Tree
Joined: Oct 2002
Posts: 137
Likes: 0
From: mcallen, texas, usa
A/F Ratio Is there a way to tell your A/F Ratio with autotap and is it accurate. i have a little knock retard in the high rpm's, and wanted to see if the A/F ratio is leaning out or something. i deescreened my maf and ever since my idle is chopy.
thanks.
thanks.
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
Re: A/F Ratio The O2 sensors would be your best bet but they aren't really that accurate at WOT. They can give you a ballpark idea though. Shoot for O2s between .870-.920. More towards the .920 if you're having pinging problems.
Your idle is going to be at a 14.7:1 ratio regardless of what you've done to your MAF sensor.
Your idle is going to be at a 14.7:1 ratio regardless of what you've done to your MAF sensor.
Thread Starter
On The Tree
Joined: Oct 2002
Posts: 137
Likes: 0
From: mcallen, texas, usa
Re: A/F Ratio Colonel thanks for the tip, I checked my logs and the bank 1 sensor 1 and bank 2 sensor 1 are at an average of about 870 . by the way the engine is 5.3 ext cab silverado. is that number good? what would be the chopy idle?
