TAB & TAD testing
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Tuned
Joined: Aug 2007
Posts: 287
Likes: 1
TAB & TAD testing
1988 F250 351W
Can anyone tell me how?
I have a theory that I might be getting a false lean condition after warm up. I understand that if these solenoids malfuction, air can always be directed into the air tubes at the exhaust upstream from the O2 sensor.
Thanks
Can anyone tell me how?
I have a theory that I might be getting a false lean condition after warm up. I understand that if these solenoids malfuction, air can always be directed into the air tubes at the exhaust upstream from the O2 sensor.
Thanks
Posting Guru
Joined: Aug 2007
Posts: 1,714
Likes: 1
From: Canton, IL
No, Exhaust pressure would keep fresh air out. but if the EGR is not working, You would get more fresh air (instead of a litttle exhaust gas) into the combustion chamber. Normally though, when this happens, it doesn't affect anything, and the computer compensates based on feedback from the O2 sensors.
Unless you have a hole in your Y-pipe above the O2 sensor, Replace your O2 sensors.
My $.02
Unless you have a hole in your Y-pipe above the O2 sensor, Replace your O2 sensors.
My $.02
