Fuel light came on,tank nearly empty,started bike up next morning and idles ok but badly misfires when try to accelerate,filled tank up with mobil 98 octane which i have used before and it still misfires badly.should i not let tank get to much empty because of condensation or muck in tank or something ,bike has done 900kms,ride to work most days which is 15km each way, even when warmed up it still misfires but idles ok.bike is a bit fussy in morning when cold but when warmed up it flys until now.

The old gas thing isn't good, but this seems pretty extreme unless the gas was visibly bad. Did you examine or filter it when you siphoned it to be sure it had no visible water or contaminants? Anyway, its certainly worth exploring before going farther. Make sure its got clean fresh fuel. Otherwise, maybe timing belt / chain trouble?

Fuel pump

How long has this been going on? Could be a bad tank of gas... do you fill up at good stations like Chevron or the cheap Mexican ones? Also if you filled up when the tanker truck was filling the station you may have ended up with a tank full of sediment; there's a lot of gunk in their underground tanks and when the tanker tops it off the filling action stirs up a lot of that ****. Try filling the tank with some high-quality 87 octane (91 will make it worse) after putting a bottle of fuel system cleaner in the tank. You should also try pulling the codes; some codes do not cause the check engine light to illuminate but are still stored by the PCM. If all else fails, go back to the basics... fuel, spark and pressure. If you can eliminate two you should be able to make your job easier.

Hi sounds like bad fuel, if it was an ethanol blend you bought, it could have a high water content, BP has a fuel guarantee but its pretty time consuming to get them to do anything, especially if it was a distributor site, not owned by BP.
Drain the carb bowls into a clean container and see if you can see any water or contaminants.
If the bike rides reasonably, it might come good on its own, with the next tank full. Make sure no ethanol( so bypass BP)
If you got some free water in your tank most of it will be below the reserve pick up, so the bike may stop completely if it gets to reserve.
Unfortunately if there is water in the bottom of your tank this may require draining the tank. as all the fuel additives will turn this into milky looking fuel that will make the bike run worse.

I took the car to volvo garage in the morning . They found out that there was a cut cable in the engine compartment near the throttle valve.
Anyway i want to express my thanks to you for your immediate response.

Regards
George

It sounds like you may have picked up some small debris from the bottom of the gas tank when you ran it empty. You may need to run a fuel/injector cleaning solution through the next tank of gas to clear the debris and consider changing your fuel filter too. Sea Foam is a great fuel additive and I recomment trying it full strength. Hope this helps!

DRAIN CARBS FROM PETCOCK AT BOTTOM OF EACH CARB MAKE SURE FUEL DRAINS COMPLETELY THEN TURN FUEL BACK ON, IF THIS IS AN INJECTED MODEL DRAIN TANK AND FLUSH THEN RUN IT HARD FOR 20 MILES OR SO, MAKE SURE YOUR OIL LEVEL IS OK

If you need further help, I’m available over the phone at https://www.6ya.com/expert/michael_00678fd4800d19c5

sounds like you are suffering from low fuel pressure, with a proper gauge you can check to be certian that you have addaquit pressure. at idle you should have 14-18 psi.

adjust the slack in the brakes as too tight can make the brakes ht & expand thus engage slightly!

Dear atomicboy488,

A lot of Rain=Possible Water in the Gas=Erratic Running!
This sounds like it may be as simple as cleaning the water or gunk out of the gas tank which is what I always do 1st because it's easy and inexpensive.
If your fuel is contaminated with gunk, grime, WATER and/or bottom junk like rust this will cause stalling AND ROUGH ACCELERATION!
Try spraying a can of starter fluid in the air intake and see if it runs! If it does, it's most likely bad fuel or clogged injectors so....
Fill the tank with High Test, Add some DRYGAS and a good fuel system cleaner or 2 or 3 and this should dissolve all the gunk and clean the injectors! Read & follow the cans' instruction carefully.
If this cures the problem never let your gas tank get below 1/4 and especially never run it to empty as this is when the gunk and/or water will enter the system!
Hope this helps!
Good Luck!
jackiaria
Please Rate This!