Lots of fuel in oil

BigIslandSevens · 12-06-2009, 05:18 AM

Hey everyone,

I am having a issue with my engine. A quick run down as to what is inside the engine. It is a Half Bridge FD irons, and Pineapple racing template for a Bridge on the exhaust.FD housings, with S4 T2 rotors and e-shaft.weight etc.. Atkins seals(all hard seals and Oil ring o'rings)

My issue is that whenever I run the car, my oil becomes very overfilled with fuel. My catchcan fills up and starts spewing everywhere. I don't have any real hard #'s as to how much and how long it takes to happen. Mostly bacause I can't make myself drive it with oil that is being assaulted that hard and fast. I actually have not hit boost because I know something aint right

Has anyone had this issue before? I have pulled my fuel system and checked it off the car for a sticking injector. no luck. Could a sticking side seal cause this much fuel blowby? I had one seal that was sticky when building the rotors. I managed to get it working properly but the thought is in the back of my head.

Could I have gone too big on my intake porting to cause this? ( This was my first time porting, so I very well may have fugged it up

)

I know I am going to have to tear it open and look eventually, just been trying to think of anything"external" that may cause this. Thanks for any help.

Dave

***Herblenny*** · 12-06-2009, 08:01 AM

Question, are you burning oil as well?

BigIslandSevens · 12-06-2009, 08:57 AM

Not as far as I can tell. It does not smoke or smell of oil burning.

David Jerome · 12-07-2009, 01:04 PM

What injectors? Any tuning? What ecu?

BigIslandSevens · 12-07-2009, 03:07 PM

550 Primaries 1300 secondaries PFC tuned for my previous 62-1 stock port single set-up. Never had an issue before. Porting is the only "big" change. But I can't figure how the fuel is getting into the oil unless I have a stuck seal allowing it to wash by.

I am really thinking I did something to my primary ports. I am getting a replacement center iron( at least) and tearing it open in a month or so. Any ideas for what to look for are appreciated.

Dave

milano maroon · 12-22-2009, 08:46 AM

Any evidence of fuel in the vacuum line off of the fuel pressure regulator?

BigIslandSevens · 12-22-2009, 09:47 AM

No, I thought of that and hoped it was that easy. It wasn't

I have a new center iron coming to me and that will receive a mild porting.( I went to crazy with the current one I think.) Also I need to have a ton of fuel pulled from my the cruise ranges I believe. I have seen a few other threads over on the other board regarding the same issue with HB engines.

In the next few months I plan on getting a wideband in the car, attaining the PFC software for tuning, and attend the first section of EFI 101 tuning class.

Dave

milano maroon · 12-27-2009, 10:14 AM

If you really suspect a stuck side seal I think a compression test might give you a clue. One low face would indicate a side seal issue, two low faces a bad apex seal. Do you remember which rotor had the suspect seal? Could you try "steam cleaning" to try to unstick? I would think a large primary port could decrease vacuum and perhaps make for harder starting but I don't see how it would contribute to fuel in your oil.

I too had fuel in my oil but I believe it was due to flooding the engine twice. If it isn't a leaky injector (I pulled my rails and turned the pump on - no drips), checked the FPR vac line, then I don't know of any other external paths for fuel to enter the crankcase.

12-06-2009, 05:18 AM	#1
BigIslandSevens Rotary Fanatic Join Date: Feb 2008 Location: Denver, NC Posts: 201 Rep Power: 18	Lots of fuel in oil Hey everyone, I am having a issue with my engine. A quick run down as to what is inside the engine. It is a Half Bridge FD irons, and Pineapple racing template for a Bridge on the exhaust.FD housings, with S4 T2 rotors and e-shaft.weight etc.. Atkins seals(all hard seals and Oil ring o'rings) My issue is that whenever I run the car, my oil becomes very overfilled with fuel. My catchcan fills up and starts spewing everywhere. I don't have any real hard #'s as to how much and how long it takes to happen. Mostly bacause I can't make myself drive it with oil that is being assaulted that hard and fast. I actually have not hit boost because I know something aint right Has anyone had this issue before? I have pulled my fuel system and checked it off the car for a sticking injector. no luck. Could a sticking side seal cause this much fuel blowby? I had one seal that was sticky when building the rotors. I managed to get it working properly but the thought is in the back of my head. Could I have gone too big on my intake porting to cause this? ( This was my first time porting, so I very well may have fugged it up) I know I am going to have to tear it open and look eventually, just been trying to think of anything"external" that may cause this. Thanks for any help. Dave

12-06-2009, 08:01 AM	#2
*Herblenny* Founder/Administrator/Internet Pitbull :) Join Date: Jan 2008 Posts: 644 Rep Power: 10	Question, are you burning oil as well? __________________ DGRR 2013 - Year of 13B www.DealsGapRotaryRally.com http://www.facebook.com/Herblenny

12-06-2009, 08:57 AM	#3
BigIslandSevens Rotary Fanatic Join Date: Feb 2008 Location: Denver, NC Posts: 201 Rep Power: 18	Not as far as I can tell. It does not smoke or smell of oil burning. Last edited by BigIslandSevens; 12-06-2009 at 09:04 AM.

12-07-2009, 01:04 PM	#4
David Jerome RCC Contributor Join Date: Jan 2008 Posts: 713 Rep Power: 18	What injectors? Any tuning? What ecu?

12-07-2009, 03:07 PM	#5
BigIslandSevens Rotary Fanatic Join Date: Feb 2008 Location: Denver, NC Posts: 201 Rep Power: 18	550 Primaries 1300 secondaries PFC tuned for my previous 62-1 stock port single set-up. Never had an issue before. Porting is the only "big" change. But I can't figure how the fuel is getting into the oil unless I have a stuck seal allowing it to wash by. I am really thinking I did something to my primary ports. I am getting a replacement center iron( at least) and tearing it open in a month or so. Any ideas for what to look for are appreciated. Dave

12-22-2009, 08:46 AM	#6
milano maroon The Newbie Join Date: Jul 2008 Posts: 6 Rep Power: 0	Any evidence of fuel in the vacuum line off of the fuel pressure regulator?

12-22-2009, 09:47 AM	#7
BigIslandSevens Rotary Fanatic Join Date: Feb 2008 Location: Denver, NC Posts: 201 Rep Power: 18	No, I thought of that and hoped it was that easy. It wasn't I have a new center iron coming to me and that will receive a mild porting.( I went to crazy with the current one I think.) Also I need to have a ton of fuel pulled from my the cruise ranges I believe. I have seen a few other threads over on the other board regarding the same issue with HB engines. In the next few months I plan on getting a wideband in the car, attaining the PFC software for tuning, and attend the first section of EFI 101 tuning class. Dave

12-27-2009, 10:14 AM	#8
milano maroon The Newbie Join Date: Jul 2008 Posts: 6 Rep Power: 0	If you really suspect a stuck side seal I think a compression test might give you a clue. One low face would indicate a side seal issue, two low faces a bad apex seal. Do you remember which rotor had the suspect seal? Could you try "steam cleaning" to try to unstick? I would think a large primary port could decrease vacuum and perhaps make for harder starting but I don't see how it would contribute to fuel in your oil. I too had fuel in my oil but I believe it was due to flooding the engine twice. If it isn't a leaky injector (I pulled my rails and turned the pump on - no drips), checked the FPR vac line, then I don't know of any other external paths for fuel to enter the crankcase.