im running a b20b with a gsr head and its got a stock fuel pressure regulator and its running really rich im wondering since is has a low compression do i have to turn it down what are some numbers you guys are running?

 

are u sure your running rich, and are you sure there is no problem with your map sensor or something

 

its a new map sensor on there we put a new one on because the old one broke

 

as long ast he map is hooked up correctly, it shouldnt be running rich, what codes do you have.

 

its throwing a coolant temp code and thats it and the exhuast is real black running real rich

 

try replacing the coolant temp sensor. if the sensor is bad and it's making the ECU think the engine coolant temp is still cold it will cause it to run very rich.

that might help a bit

 

what would that have to do with the fuel im not trying to be an *** could you explain it to me