Finally an STR, Cat delete
#1
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#2
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Fooling the downstream O2 sensors cause more problems than they solve, the downstream sensors are also used for fuel trims. If you put extensions or mincats on the downstream sensors your fuelling will be off.
Have a look here https://www.jaguarforums.com/forum/x...-remap-140980/ , you can see the dyno chart with the big lean patch in the AFR's, on that car we removed the minicats, changed the emissions settings, and it was all fixed. No more CEL, no codes, and the fuelling was correct.
There is a way to disable the catalyst efficiency monitoring so that you don't get a CEL or the P0420/P0430 codes, I know a guy in Phoenix who has the diagnostic tool which can do this properly.
A properly designed exhaust, not oversized i.e. stick to the 2.25" size, with an x-pipe, and some properly designed mufflers will be loud enough without compromising back pressure. If you want the old-school V8 sound then fit an H-pipe crossover instead of an x-pipe.
Have a look here https://www.jaguarforums.com/forum/x...-remap-140980/ , you can see the dyno chart with the big lean patch in the AFR's, on that car we removed the minicats, changed the emissions settings, and it was all fixed. No more CEL, no codes, and the fuelling was correct.
There is a way to disable the catalyst efficiency monitoring so that you don't get a CEL or the P0420/P0430 codes, I know a guy in Phoenix who has the diagnostic tool which can do this properly.
A properly designed exhaust, not oversized i.e. stick to the 2.25" size, with an x-pipe, and some properly designed mufflers will be loud enough without compromising back pressure. If you want the old-school V8 sound then fit an H-pipe crossover instead of an x-pipe.
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jagstuart (01-22-2017)