I have a Z6 w/ greddy turbo kit and custom intercooler setup and currently running an FMU at 5lbs. I tried running check valves to reroute the boost past the MAP sensor but it seems that Im not doing it right. When I boost for a few minutes its ok, but when I lay on it it throws a check engine light then runs rich as hell and idles around 1100 rpm. Ive got no clue. help me please.

 

o2 sensor?

Try to read the code dawg.

 

cool, I thought maybe it was because I didnt have a missing link to bypass the boost. Ill try to change out the O2

 

MAP sensor will always fail, no matter if your engine is cold or warm...

As soon as MAP sensor see's boost, it'll go in CEL....

 

how manny check valvs are u running each one usualy can only blead off like 3 or 4 psi so u might need more and im almost posative it is ur map i almost never have a o2 senscor and it never affects my manigment what r u running for fuel and ecu

 

Just keep adding check valves. My old A6 took 4 before it would stop throwing a MAP CEL.