Check Engine Light even with Missing link bypass valve!

[Turboteggs-r]

I installed a Drag Gen 3 turbo on my 95 GSR and I also installed the Missing link MAP bypass valve and sometimes when I am driving around normal and not revving the motor the Check engine light will come on and it will run rich! It is stuck on now and I need to know if anyone has had the problem?

[redfox]

Hmm.. now the first step is to pull he check engine code. You can do so by bridging the an ECU plug. I think the instruction is somwere on this board. Too lazy to look.

Most likely, it's either an o2 sensor code or a MAp sensor code. If it's the o2 sensor, get underneath your car and wiggle the o2 sensor harness around to make sure everything is connected perfectly, if that doesn't work, then you may have to replace your O2 sensor.

If it's the map sensor, chances are the Missing Link is dirty, take it out and clean it.

[14psi]

if it is the map sensor, try using fish tank check valve from pet smart 3 or 4, get some t's connect them with fitted tubing one end goes into the original whole in throttle body where map sensor use to go and the other end to the map sensor.(this work when it comes on during boost) hope this help. did you boost before the missing link, if you did it's possible the map sensor went bad.