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Discussion Starter · #1 ·
i have been testing this out for a few weeks now and i have found a way to keep the CEL off with no cats. it still shows up in the monitor status as ready and working properly and there is no need to do anything with the tune. i am running the tune from Kenne Bell that has the downstream's enabled and it works like a charm

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Vibrant Oxygen Sensor Defouler - Universal Exhaust Items

this is my test side sensor. YOU MUST INSTALL THESE WITH THE PIPE OFF!! i used 2 spark plug foulers that were drilled out to space it out enough for the testing.




this is the stock sensor in the stock location i used to see when the CEL was going to pop on. i always got the 420 and 430 codes at the same time. i kept it stock to see if they would still throw a code at the same time for the testing.


i have put over 500 miles on the car with this setup and it only throws the code for the stock sensor. the 90* fitting is showing ready and working fine and no code has been set. i will have the other 90* fitting installed this week and will keep this updated as it goes.
 

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Thanks for this post. I've have a Lethal OR H ready to go on my car, but I've been going back and forth debating on whether to use a custom tune from a local co or mail order shop, so I can keep the CEL off; or using the Ford Racing ProCal tuner in the mean time to get some decent gains (and live with the CEL on) until I'm comfortable enough to do a custom tune and forgo my warranty. I've seen several posts on the web about people questioning whether the ProCal could turn off the CEL and of course, it can't. But this just may work.
 

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Will be keeping tabs on this. Let us know what you find when both are installed. Thanks for posting.
 

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Discussion Starter · #4 ·
dropped the front of the h pipe and installed both 90* fittings WITHOUT foulers for spacers this morning. i'll post up after a few hundred miles as to how it is working





 
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