Turning Off "Check Engine" Light
 

Is it possible to clear the "Check Engine" light by disconnecting the battery, or does this have to be done with a scanner or by the dealership? My light is not on, I am just wondering because it may come on after I install my new H-pipe w/cats.

Yes you can clear it by disconnecting your battery but it will just come back on after a little while. If it's the H pipe that trips it then just pick up a set of MIL eliminators. You shouldn't get one though if your running cats.

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00 GT, MAC Offroad H, Steeda Pulleys, Steeda Timing Adjuster, FMS 4.10’s, Flows w/turndowns, UPR shifter, UPR subframes, UPR adj LCA’s (not installed), Air Filter, Lakewood 70/30 & 50/50, Weld Pro Stars, Nitto DR’s, 253.8 RWHP/292.8RWTQ
Best on DR's 13.09@103.92 (1.81 60ft)
Best on ET Drags 12.91@101.93 (1.74 60ft)
M/M 100
88 LX coupe X-FHP, 12pt Cage, UPR K-member, 31 spline rear, full spool (For Sale)

Thanks for the info! I have heard some cases where aftermarket pipes with hi-flow cats have set the engine light. Hopefully mine will not! I have heard of the MIL eliminators. What are they, $50 a set? Also does it matter how close the rear O2 sensors are to the cats?

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'97 Cobra, Rio Red, MAC Cold Air Kit, 3.73s, NGK V-Power

It won't make much of a difference how close they are to the cats. Are you putting high flow cats on? If so, I doubt you'll have any trouble. I have a BBK off road H pipe with MIL eliminators and no check engine light. I bought them through Need 4 Speed in California for about 45 dollars. Took 2 minutes to strap in. Well worth the money to avoid the headaches.

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1997 Cobra (Black on black), C+L 80mm MAF, K+N filter, Pro 5.0 shifter, BBK Springs, Taylor Wires, 2 Chamber Flows, ASP Pulleys, BBK off road H pipe.