rb25 fuel in oil

Post by **lazyeyes13** » Mon Mar 10, 2014 8:26 pm

Im getting a lot of fuel in my oil and I'm not exactly sure why...
Ive heard people say leaky injectors a lot
Im also running very rich and I've also heard people say running rich can cause this
Only mods are:
Greddy intake manifold
fmic
3in exhaust
q45 throttle body
ebay BOV

NO TUNE!!

Would these mods without a tune cause it to run that rich and be causing the fuel getting in the oil???

Website · Post by **USMCgetsome** » Tue Mar 11, 2014 9:32 am

easy way to tell if your injectors are leaking is to pull the fuel rail off with the fuel lines still attached and have some one crank the car as you watch the injectors fire. If it's a puff of mist your ok if it is leaking constantly due to stuck open injector/bad o-ring injector grommet well you'll fix you issue a lot quicker than assuming it's a tuning problem. make sure YOUR IGNITION SYSTEM IS DISABLED!

Post by **lazyeyes13** » Tue Mar 11, 2014 10:39 am

USMCgetsome wrote:easy way to tell if your injectors are leaking is to pull the fuel rail off with the fuel lines still attached and have some one crank the car as you watch the injectors fire. If it's a puff of mist your ok if it is leaking constantly due to stuck open injector/bad o-ring injector grommet well you'll fix you issue a lot quicker than assuming it's a tuning problem. make sure YOUR IGNITION SYSTEM IS DISABLED!

Ok I tested that and all my injectors are puffing mist and I did not see any leaks

Any other suggestions?

Post by **Largekid** » Tue Mar 11, 2014 10:43 am

I ran very rich for a while and had some fuel in my oil. it was enough fuel though that it fouled out my plugs. I would invest in a tune.

Post by **lazyeyes13** » Tue Mar 11, 2014 10:53 am

Largekid wrote:I ran very rich for a while and had some fuel in my oil. it was enough fuel though that it fouled out my plugs. I would invest in a tune.

Yeah I pulled all my plugs out and they're all really black.

It does need a tune but I figured that only needing a tune wouldn't cause this.. But maybe I'm wrong

Did you ever figure out why fuel was getting in your oil?

Post by **Darius** » Tue Mar 11, 2014 12:00 pm

Do not try to start the car with the injectors pulled. You won't be able to see leaks with fuel spraying everywhere. Just turn the ignition to ON to prime the fuel pump. If fuel starts coming out of the injectors, a leaky o-ring is your problem.

Post by **lazyeyes13** » Tue Mar 11, 2014 12:22 pm

Darius wrote:Do not try to start the car with the injectors pulled. You won't be able to see leaks with fuel spraying everywhere. Just turn the ignition to ON to prime the fuel pump. If fuel starts coming out of the injectors, a leaky o-ring is your problem.

Ok my cars in my tech class shop so I'll give it a shot tomorrow

Thank you for the input!

Post by **lazyeyes13** » Tue Mar 11, 2014 12:28 pm

Darius wrote:Do not try to start the car with the injectors pulled. You won't be able to see leaks with fuel spraying everywhere. Just turn the ignition to ON to prime the fuel pump. If fuel starts coming out of the injectors, a leaky o-ring is your problem.

Well actually I just did it real quick before I left haha
But no fuel was leaking from injectors with the pump priming...

Any other thoughts on what it could be?

Post by **Darius** » Tue Mar 11, 2014 8:42 pm

Do you have a stock ECU, injectors, and MAF sensor?

Post by **lazyeyes13** » Tue Mar 11, 2014 9:37 pm

Darius wrote:Do you have a stock ECU, injectors, and MAF sensor?

Yeah injectors, ecu, and Maf is all stock

Post by **Largekid** » Wed Mar 12, 2014 6:13 am

lazyeyes13 wrote:
Largekid wrote:I ran very rich for a while and had some fuel in my oil. it was enough fuel though that it fouled out my plugs. I would invest in a tune.
Did you ever figure out why fuel was getting in your oil?

lack of a real tune, haha.

Post by **lazyeyes13** » Wed Mar 12, 2014 6:29 am

Well I'm leaning towards going with a tuned z32ecu instead of full standalone, I think it'll be sufficient with the mods I want and my power goals.

Any other thoughts as to why I'm getting fuel in my oil??

All the input is greatly appreciated!

Post by **Darius** » Wed Mar 12, 2014 12:39 pm

Do you have the stock fuel pressure regulator installed?

I'd check the narrow band O2 sensor too.

Besides those things, there should be no other way to run so rich that it contaminates the oil.

Post by **lazyeyes13** » Wed Mar 12, 2014 4:34 pm

Darius wrote:Do you have the stock fuel pressure regulator installed?

I'd check the narrow band O2 sensor too.

Besides those things, there should be no other way to run so rich that it contaminates the oil.

No I have a nismo adj. fpr installed. And how would I check the narrowband o2 sensor?

Post by **Darius** » Wed Mar 12, 2014 4:57 pm

What pressure is the regulator set at?

Typically, you'll get a CEL if your O2 is bad depending on how your car is wired. Otherwise, just replace it with a new one and call it general maintenance

Post by **lazyeyes13** » Wed Mar 12, 2014 5:29 pm

Darius wrote:What pressure is the regulator set at?

Typically, you'll get a CEL if your O2 is bad depending on how your car is wired. Otherwise, just replace it with a new one and call it general maintenance

I haven't started the car since I put it on because I'm waiting on some inter cooler couplers, so I haven't set it yet

And ok I'll give it a shot! Haha

Post by **Darius** » Thu Mar 13, 2014 7:43 am

When I installed my Nismo FPR, it was way off. Hopefully it is that easy!

Post by **lazyeyes13** » Thu Mar 13, 2014 7:53 am

Darius wrote:When I installed my Nismo FPR, it was way off. Hopefully it is that easy!

Ok I will update after all the parts come in and when I get everything set!

Post by **lazyeyes13** » Sun Mar 16, 2014 3:57 pm

Still waiting on some parts to come in before starting it. The fuel pressure with the vacuum line off is going to be set at 43 psi because thats what I've read it should be set at.

Although I didn't see any leaks on the injectors maybe I should buy new orings and see if that helps

I hooked a scan tool up to it when the ignition was ON because I can't start it yet and I was getting REALLY HIGH number for my tps when it was closed, closed it read 3.2v and WOT it read 5v
Im going to try and adjust it and see if that will take care of it

Once Im able to start it, Ill hook the scan tool back up while its running and see if it throws any codes, that'll tell me if the o2 sensor is bad

Any other things I could check or double-check??? I need to get this fuel to stop getting into my oil lol

Website · Post by **USMCgetsome** » Sun Mar 16, 2014 6:52 pm

Yes tps is involved and mainly the timing and CAS drive the signal to the ecu then transmit pulse signal to the injectors. So other than that check your voltage from your battery to ensure the injector is properly 12vdc charged. also get resistance checks on the injectors.

Post by **lazyeyes13** » Sun Mar 16, 2014 8:03 pm

USMCgetsome wrote:Yes tps is involved and mainly the timing and CAS drive the signal to the ecu then transmit pulse signal to the injectors. So other than that check your voltage from your battery to ensure the injector is properly 12vdc charged. also get resistance checks on the injectors.

What should I set the CAS at? and what should the resistance on the injectors be?

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