No SES after header install
#1
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Allright, so I finished my header install this week and evrything went pretty smooth. I started the car up (w/ only 1 O2 sensor) and it idled fine and ran good. But to my surprise, no check engine lights have come on. I've been driving it for a few days now and it still hasn't thrown any codes. Any ideas why?
#5
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I dunno... when I did LTs no light came on either... when I took it to be tuned someone had locked the computer... The only people that could have done that was Chevrolet when I took the car in to replace the cats... that may explain why it continued to run like crap after they replaced the defective cats
.... If you had them replaced under warranty same thing could have happened to you... The tuned out all my o2s to avoid the warranty
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#6
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it might take a while. Mine came on w/ cats and both sets of 02's hooked up after a couple weeks. You say you have HPTuners, disable the codes for all that **** anyway and dont worry about it.