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View Full Version : RB25 240 only running good when its got below a quarter tank... Help!


Crossdup
10-21-2011, 02:41 PM
I've been having problems with my car just one thing after another lately. Had to do an alternator swap cuz of charging problems, change relays, just running shiitty so I've been trouble shooting and fixing little things trying to narrow it down. Got it running good for a very short amount of time then it went back to the bogging, sounds like its rediculously rich but i don't have air/fuel. When I get on it the car just bogs, almost sounds like a boxer motor or something when im on it. It accelerates, not very fast but its not dangerously slow its barely driveable I would say. I let it sit for a week or so, got in again and it ran like a champ, I was shocked. I go down put gas in it and pull out of the gas station and bam right back to where it was.



Some help would be greatly appreciated, I definitely have it narrowed down to fuel but the level in the tank stumps me. I don't have an FPR on the car but I do have a walboro obviously. I'm running 12lbs but I turned that down all the way down to factory just to see and it didnt matter, same thing.



Thanks again, help is appreciated.

fliprayzin240sx
10-21-2011, 03:43 PM
So it runs good when cold but runs crappier when its warmed up?

Crossdup
10-21-2011, 04:07 PM
Not quite, as much as I kno fuel in the tank has nothing to do with anything, I drove the car to the gas station and it ran good. Pulled hard all the way to redline. I put gas in got over half tank and pulled out of the gas station and got on it and it makes this muffled bogging sound idk how to explain exactly. It just blows my mind how that could have anything to do with it. I also just started noticing a small mis-fire when idleing so I could have some injector issues going on.

Anyone wanna weigh in on this and tell me what you think? I'm just so tired of troubleshooting, I've been trouble shooting for days.