fuel in oil.

[PorkChopExpress]

is checking codes for the rb20 the same for the rb25?

im getting alot of fuel in my oil..

walbro 255 with adjustable fpr set to 43psi.

i did a couple of wot pulls and checked the plugs. all looked good. good compression. no blowby, 20inhg at 800rpm.

im guessing its coming from a faulty o2 sensor while cruising,idle.i get no change in tone when unpluging the o2 sensor.

never hooked up the white hotwire for the o2, didnt know where to wire it to.the other 2 wires are hooked up tho. the signal and ground to the cpu.

[240z4u]

is checking codes for the rb20 the same for the rb25?

im getting alot of fuel in my oil..

walbro 255 with adjustable fpr set to 43psi.

i did a couple of wot pulls and checked the plugs. all looked good. good compression. no blowby, 20inhg at 800rpm.

im guessing its coming from a faulty o2 sensor while cruising,idle.i get no change in tone when unpluging the o2 sensor.

never hooked up the white hotwire for the o2, didnt know where to wire it to.the other 2 wires are hooked up tho. the signal and ground to the cpu.

First, its ECU.

Second, I dont think you have your wiring correct. Two wires are for the heater and one is for signal. You need to run the heater.

If you have fuel in your oil you likely have a leaky injector. You need to fix that asap, fuel ruins oil. Dont drive it again until you change the oil.

Evan

[USMCgetsome]

put both white wires to a 12vdc source. The heating element is a 12vdc source. Other is for signal.

As for fuel it might just be time for new injectors. You might have an issue figuring which one is faulty.

yeah what he said DO NOT DRIVE IT! TILL YOU CHANGE OIL. AND SOLVE THE OVER FUELING PROBLEM.

[PorkChopExpress]

ok checked codes. just got a 55. even with the o2 sensor unplugged it is 55. so i guess it doesnt care about the o2 sensor?

no change in tone when unplugged.

the plugs would tell me if i had an injector problem.

the shematics in the manual only show 2 wires a signal and ground i believe i wired that up to the ecu right dont remember. looking at it i have a black and white going to the ecu. didnt hook up the red.(the heater) didnt know where to wire it and didnt think it would matter,

what voltage am i looking for when i hook up a meter? my computer sucks and crashed half the time i try to open adobe. makes lookin a pain. sorry.

[HxC_Nismo]

you should have battery voltage at the heater wire

[lazyeyes13]

Sorry to bring up such an old topic, but I am getting a lot of fuel in my oil as well. Ive heard everyone say its most likely a leaky injector but I pulled the rail off and primed the pump and looked for leaks and did not see anything. Is there a better way to test them for leaks? If its not injectors then what else could it be?