Hi, i have a 02 F4i and haven't really ride it for about 6 months now. Today i decided to change the oil to ride it a little bit before the summer is over and when I drain the oil there was alot of fuel that came out with it and i check my fuel tank and its empty.

is this normal? or something is wrong.

thanks for any help.

 

dude, you better get that checked, gas in the oil is not normal!

 

not sure how but if you had gas draining through the injectors, thru the intake, into the cylender, and past the rings, it would put it in the oil..

 

Definitly not good. If you are not excellent at troubleshooting then take it to a shop.

Gas in the oil can kill your motor FAST.

 

im thinking about go ahead and change the oil and put in more gas for the gas tank and see if it happen again.

anyone might know what's going on, please let me know. thanks.

 

You may have issues with your injectors sticking and flooding the cylinders. This washes the oil from the cylinder walls. With the RPM these bikes are capable of you can destroy the cylinder walls before you know what the issue is.

I would suggest pulling the injectors and having them checked. If they check out, then the fuel pressure regulator and return line would be my next guess. Those are really the only items that can dump fuel into the bike.

If you slap it back together and ride it, you may end up with a seriously damaged motor.

 

I'm thinkin fuel pressure reg.

 

Even if the FPR is jammed full open, then when the bike is off there shouldn't be any fuel getting past the injectors. I could see a FUBAR FPR running rich and washing the cylinders, but not with the bike off.

 

can someone tell me where is the FPR for the F4i locate at? some kind of a picture would be nice.
i'll check the injectors and the FPR tomorrow.

 

So exactly how are you going to test them when you do get them off?

For the FPR you need to be able to test the pressure coming off the rail under vacuum and no vacuum. You can check the injector coils with a multi-meter, but actually testing the injectors requires a fairly complex test rig and a medium that mimics the viscosity of fuel.

About the best thing I can think of to test them all at the same time is to pull the throttle bodies off of the head (leave everything else connected) and turn the bike on. DO NOT START IT. Just turn the key to on with the switch in run. You should hear the pump cycle but no gas should come out of the intectors.

One culprit that I have run into is the FPR going bad and leaking fuel past the diaphram. It dosent go into the engine, just everywhere else as soon as you turn the key.