Originally posted by SoopaCooga:
the upstream sensors impact the fuel trim tables. the downstream describe pre-cat efficiency, right?
That is correct.
Quote:
so how come my car got richer after installing MIL eliminators? could it be that it's always been rich but the fuel used to burn up in the pre-cat but now is advancing further down the exhaust system? hmmmmmmmmmmm
That's as good a guess as any.
Only way to know for certain is to install an A/F guage.
Steve
98 Contour SE Sport 2.5 Duratec ATX The wifey's car
89 Taurus SHO - 246K miles
94 SHO ATX - 190K
1997 F-150 5.4L ATX - The Workhorse 150K.
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