Possible fuel pump whine

bluesman · 09-05-2019, 05:04 PM

Put some octane booster in my tank today and went for a ride. After a while I heard a whining noise that was never present before. When I put my ear close to the speedo I hear it more and it sounds loud. Any suggestions? I also put some low octane gas back in the tank as maybe the octane rating was too high, don't know.

recumbentbob · 09-05-2019, 05:41 PM

put 1.5 - 2 ounces of MMO in the next few tanks og gas, that should lub the pump and quiet it down.

MMO=Marvel Mystery Oil

bluesman · 09-05-2019, 06:33 PM

I'll get some and try it tomorrow, some lubricity in the pump makes sense, thanks for the tip.

bluesman · 09-07-2019, 01:06 PM

Did I screw up the bearings adding the octane booster? If so will running Mystery oil thru at each fill up fix it or just hopefully eliminate the loud whine.

ldhthept · 09-07-2019, 01:16 PM

Lubricity can never be over rated...

09-05-2019, 05:04 PM	#1
bluesman Member Join Date: Mar 2009 Location: Thessalon, Ontario Posts: 113	Possible fuel pump whine Put some octane booster in my tank today and went for a ride. After a while I heard a whining noise that was never present before. When I put my ear close to the speedo I hear it more and it sounds loud. Any suggestions? I also put some low octane gas back in the tank as maybe the octane rating was too high, don't know. Login or Register to Remove Ads
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09-05-2019, 05:41 PM	#2
recumbentbob Sr. Member Join Date: Mar 2009 Location: Newburgh IN Posts: 3,404	put 1.5 - 2 ounces of MMO in the next few tanks og gas, that should lub the pump and quiet it down. MMO=Marvel Mystery Oil __________________ VBA #01084 "A well regulated militia being necessary to the security of a free State, the right of the People to keep and bear arms shall not be infringed."
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09-07-2019, 01:06 PM	#4
bluesman Member Join Date: Mar 2009 Location: Thessalon, Ontario Posts: 113	Any other suggestions Did I screw up the bearings adding the octane booster? If so will running Mystery oil thru at each fill up fix it or just hopefully eliminate the loud whine.
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09-07-2019, 01:16 PM	#5
ldhthept Sr. Member Join Date: Mar 2010 Location: Tallahassee FL Posts: 1,037	Lubricity can never be over rated... Login or Register to Remove Ads
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09-05-2019, 06:33 PM	#3
bluesman Member Join Date: Mar 2009 Location: Thessalon, Ontario Posts: 113	I'll get some and try it tomorrow, some lubricity in the pump makes sense, thanks for the tip.
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