Fuel Out of Mufflers

[dantesdoom]

Replaced 3 injectors on my 300zx NA.... went and drove it and blew a fuel line at the fuel filter, so i replaced it. I thought that was the only problem, come to find out i have gas in my exhaust...passenger side only. No its not coolant (the radiator is full, and so is reservoir, and what comes out of the muffler will burn and smell like gas). I have a that skip on that side as well. So, i pulled codes to see if the fuel injector leak code would show...but i have a code 55...which you all know means its fine. Sooooo, my point is, i only replaced one injector on that side, and i quadruple checked the fuel rail to make sure it was seated good before i installed it.

I figures its the coils, or the new injector is faulty and stuck open....what do yall think...i need advice as i am going to try to solve this tom. Thanks...and remember some advice is better than no advice! Mind you, i drove five miles with new injector and this happened...so i mean it hasn't been in long! HELP PLEASE

[SilverTwin(OH)]

There is likely a pinched lower o-ring on one of the injectors. Keep in mind that if it is dumping enough fuel to come out the exhaust, it can also be enough to wash out and destroy the cylinder or hydrolock the motor. Do not continue to run the motor. A pinched o-ring would not show with ecu codes. You can either place an inline fuel pressure gauge to verify or remove the injectors from the rail. If you use an inline fuel pressure gauge it should maintain pressure once the ignition is turned off. If the pressure rapidly drops, you have a leak.

[zxFarside]

That's most likely the case. ^^^^^^^

Another less likely situation is one or more injectors are faulty and stuck open and its just spraying uncontrollable amounts of fuel into the engine,

[dantesdoom]

Yup pinched o-ring....slight dremel fix...thanks for the help!!!