car running really rich

[roxas4620]

So I have a 2011 gt500 I had the original motor replaced with a stock low milage motor. The replacement motor had about 10000 miles on it and I managed to put 2000 on the new motor before my car started running extremely rich. And I got the fuel pressure code. I looked at the sensor in the trunk and realized there was a bap hooked up. Would that cause my car to run rich and should I unhook the bap as my car is all stock?

 

[1320 Junkie]

Get a tune or strap it onto a dyno to verify what's going on while datalog necessary PID's

 

[VNMOUS1]

Yeah, a fuel pump booster with no change in the returnless fuel pump voltage table.

If that was a surprise you may want to find out what injectors are in it and if there was at one point a custom tune.

Also if you have an aftermarket cold air and no tune, the same thing can happen

 

[roxas4620]

The replacement motor is all stock the motor in my before was full bolt on with a vmp tvs but the owner before failed to upgrade the injectors so it ran lean