Re: Manifold cat delete mod, now engine light?
When I got my header put on a couple of weeks ago, the engine light popped on and I had it scanned and it came up with low voltage for the second o2 sensor...which makes sense since the o2 is not hooked up anywhere I just have it wedged by the transmission lines. As far as your cel you can either do the cheap method and put a piece of black electrical tape over the light so you won't have to look at it, or get it tuned and have the cat tuned out.
2007 GMC Canyon 3.7L SLE Crew cab 4x4
All-Flow cat in place of 2nd cat
Intake Resonator Delete
JTR Shorty Header
Sound Solutions muffler
31x10.5R15 Wild Country MTX
1971 Pontiac Catalina 400
1969 GMC C2500 305 V6