o2 simms with catted ypipe
#1
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Join Date: Nov 2001
Location: Almonte, Ont. Canada
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o2 simms with catted ypipe
After I install my Pacesetter LT with catted y-pipe do I also need O2 simms for the former rear sensors or just the extensions to place the sensors in the header bungs?
#7
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Originally Posted by beaSSt
So I can just drill a hole in the y-pipe after the cats, weld in bungs and use the existing rear O2 with extensions then?
For the front, you'll need either extensions, or 2 bosch 13111 (the wire on this o2 is long enought to reach without using an extension)
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#9
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Using the rear O2 sensors, even with cat's, will probably still trip your SES light. Some people luck out and don't get coded, while most will be coded. The rear O2 sensors are set to accept values between certain parameters without setting a code. Aftermarket cats may not operate between them, and you'll be screwed. The only thing to assure you no SES light is to have the codes tuned out (see the FAQ). Second best way is to run O2 sims (which don't work every now and then). Third way is to plug the rear O2 sensors in after the cats and hope for the best.
Check the FAQ at the top of this section.
Originally Posted by ws6formula98
What do you do if you dont use a catted y pipe? do you unplug the rear o2 sensors?if so will the check enigine light go on?