injector shot to much gas. help?

[cal-240sx]

my 93 240sx, the injector shot to much gas to the motor and it wont be able to burn all, i though it was the injector proble but i replace all the injector and still do the same..i also change the Fuel Injector Pressure Regulator but still to much gas and all my spark plug are all black. this is my third set of NGK spark plug...anyone help......please.....please...

[Silvia2NR]

So, basically you're saying your car is running very rich even after changing the injectors and spark plugs.

Test your oxygen sensor. Test your coolant temp sensor. Change your fuel filter.

[cal-240sx]

thats right my car running very rich that it creat lots of black smoke coming out of the muffer and i dont know what to do.....anyone help....

[jml062088]

th

thats right my car running very rich that it creat lots of black smoke coming out of the muffer and i dont know what to do.....anyone help....

that sounds exactly like what is wrong with mine, if you find out why its doing this please let me know, or if i find out ill let you know..thanks

[FoxFire]

check the vacuum line running to the fuel pressure regulator

otherwise i would guess faulty regulator or ecu

since you changed the regulator... i would check with the FSM
Modified by FoxFire at 5:11 AM 3/21/2008