Ever since I got my car running at the end of June It seems to put fuel into the oil pretty fast. I can change it and drive it 50 miles and be right back to a dipstick that smells like gas. After ~300 miles I can actually start to see the oil level rise a tad, maybe 1/8". I know it's rich in areas but even if it's very rich will this much fuel seep past the seals into the oil?



It's a 13B-RE with no PCV setup, the vents just go to free air. I know that isn't helping the situation but still seems like a lot of fuel

 

the fd's do this too, i think its just being rich. you not having any sort of vacuum on the crank case prolly isnt helping.



actually mine kinda does the same thing, i havent really looked into it too much yet



mike

 

Think if I hook direct vacuum to one of the ports on the filler neck it would be ok?



If I remember right there is a vacuum port right at or near the primary injectors, would this be a good place to run the line to the filler neck? That's if it's ok to run dirrect vacuum...

 

the factory usually puts it before the turbo. i think you just have to make sure it doesnt see boost



mike

 

Check to make sure your ECU is cutting fuel on decel! I fucked up one motor (spun bearings) and thought I was just running to rich. I dialed in the fuel and was still getting fuel in my oil. One day I was watching my inj duty on decel and it was staying the same after I got off the gas. I also was making nice flame shows on decel. After I fixed the problem(inj duty goes to 0% on decel) I no longer get fuel in my oil(not anymore than the normal rotary).

 

If your ECU does not have decel settings, you can set the fuel map up to give no fuel in the decel vaccuum areas. On my car I never see -550 vaccuum while driving. I only see these values when my car goes into decel, so what I did was set the whole -600 row to zero. It's not perfect , but it works. I run a power fc, which does have decel settings, but I was having problems with it, and did this as a temp fix(1 and a half years).

 

Intresting, I thought rotaries didn't recover well from fuel cut on decel? In the 22-30ingh areas I have it set to ~1.8-2ms, would that be too much fuel? (550cc primary inj)

 

They don't. I've run into this issue many times.



I think more of the compromise that ought to be met here is keeping a stoich to lean mixture in the motor on decel (30 to ~15" vacuum) to help prevent the problem that IGY ran into (although I'm still not sure if that's all that was entirely the problem nor have I ever heard of that happening before).



B

 

yeah if you do do fuel cut it needs to turn back on at something like 1700-2000rpms



also if its too lean on decel it will want to buck



mike

 

yeah if you do do fuel cut it needs to turn back on at something like 1700-2000rpms



also if its too lean on decel it will want to buck



mike [/quote]

Yep. Same issue I've run into several times, Mike. That's why I don't use it.



B