1990 300zx twin turbo running rich

[ruffride]

I was wondering if someone would know what i can do to repair my 1990 300zx twin turbo. ive spent close to 18000 on the motor which is bored, stroked, machined and polished. im using 740cc injectors with jdm 650 turbos and the car is running rich, very rich. are these injectors to big. is there any local tuners, im in richmond hill. how much or what is needed to fix this? any help would be appreciated,

thx

tom

[robomatic12]

What kind of ECU are you using? It sounds like it needs to be tuned, badly if you aren't running the correct ecu for the larger size of injectors you have.

[marty1mc]

^Agreed. I am also running 740CC Nismo injectors, but don't have an issue. I have a JWT ECU and it works quite well.

[nmgoodthing]

Boost leaks and bad 02 sensors will make you run rich.

Run codes to see if any come up.

[txQ45]

A leaky injector, bad maf, bad 02 sensor, but you should get a consult, Nprobe, Nistune along with a wideband and see whats going on..