Is there any way to not have the check engine light go off while running a test pipe. Have a 3" on there now and the light goes on. I was thinking of running the O2 sensor outside of the exhaust path and just plugging the hole. Let me know what you guys with testpipes are doing besides removing the light bulb for the CEL

99'Black GS OZ Edition

well get yourself a 1 megaohm 1/4 watt resistor from Radio Shack. Find the black wire of the rear o2 sensor AFTER the cat, cut that black wire, and solder that resistor inline with the black wire. Bam, no CEL, at leat i havent gotten one yet with a fully gutted cat.. This mod came from the Neon forums i believe...

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)

yep, it did... heres the link, http://www2.cesa12.k12.wi.us/brent/personal/neon/pic/cat_resistor.html

Matt
1995 Eclipse GS
2.0L, S16g Turbo, 8 Injectors, 26psi

1998 Eclipse GSX
2.3L Stroker, AEM EMS Converted to Speed Density, FP3065 Turbo, 35psi , and so on...