View Full Version : "Check Engine" warning

07-14-2005, 12:40 AM
Lately I put C&L 80mm MAF, Trueflow inlet pipe, BBK 62mm TB into my 97 Cobra utilizing stock sensors, and couple days later "check engine" warning lump came up. Idle rpm was adjusted and it looks everything with this mods work correctly except this sign. Can anybody figure out what's going on?:doubt:

07-14-2005, 06:36 AM
How did you adjust the rpm?

07-14-2005, 08:48 PM
At first I measured voltage on TPS to make it as same as what it was at idle position, but actually butterfly valve wasn't fully closed so that keeps the motor idle around 2000rpm. So I adjusted the adjustment screw on TB to bring it down to 900rpm.