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fuel pump
by: lain - Apr 9, 2015 8:41:05 GMT -5
Post by lain on Apr 9, 2015 8:41:05 GMT -5
So, I have been noticing when I gas up the scoot acts like it is running richer. Does the fuel pump pump more when there is more gas in it because of the volume pressing against it, or is it just broken? The vaccuum hose is dry, so not sure if it is the pump or what.
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fuel pump
by: tvnacman - Apr 9, 2015 10:45:32 GMT -5
Post by tvnacman on Apr 9, 2015 10:45:32 GMT -5
it could be a combo of both cracked line and pressure on the pump input.
John
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fuel pump
by: lain - Apr 9, 2015 12:50:34 GMT -5
Post by lain on Apr 9, 2015 12:50:34 GMT -5
it could be a combo of both cracked line and pressure on the pump input. John No cracks in the hose, do you mean the pump? The pump also looks fine, no leaks or anything. |
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fuel pump
by: tvnacman - Apr 9, 2015 14:51:47 GMT -5
Post by tvnacman on Apr 9, 2015 14:51:47 GMT -5
Hose is so cheap if I even gave it a second thought I would change it.
John
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fuel pump
by: lain - Apr 9, 2015 21:29:52 GMT -5
Post by lain on Apr 9, 2015 21:29:52 GMT -5
Hose is so cheap if I even gave it a second thought I would change it. John Been thinking about changing to clear tubing anyways, but not sure what kinds or diameter to use. |
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fuel pump
by: murkyapricot - Apr 9, 2015 22:35:07 GMT -5
via mobile
Post by murkyapricot on Apr 9, 2015 22:35:07 GMT -5
I picked up some of the helux tubing
I used caliper on my tubing and it was all 3/16
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fuel pump
by: lain - Apr 9, 2015 22:41:35 GMT -5
Post by lain on Apr 9, 2015 22:41:35 GMT -5
I picked up some of the helux tubing I used caliper on my tubing and it was all 3/16 That's the fuel tubing diameter or the vacuum tubing? |
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fuel pump
by: geh3333 - Apr 9, 2015 23:10:42 GMT -5
via mobile
Post by geh3333 on Apr 9, 2015 23:10:42 GMT -5
I picked up some of the helux tubing I used caliper on my tubing and it was all 3/16 That's the fuel tubing diameter or the vacuum tubing? Before the copper , I stepped up to 1/4 inch fuel line. |
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fuel pump
by: onewheeldrive - Apr 9, 2015 23:31:14 GMT -5
Post by onewheeldrive on Apr 9, 2015 23:31:14 GMT -5
Is it a vacuum fuel petcock? Maybe fuel is being sucked down the vacuum line into the intake manifold. The petcock might be worn.
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fuel pump
by: tvnacman - Apr 10, 2015 4:51:42 GMT -5
Post by tvnacman on Apr 10, 2015 4:51:42 GMT -5
stock lines are 3/16 for both, I use 1/4 and screw hose clamps, it a few drops more fuel in the line because of the larger diameter. I find the emissions to be troublesome for test I disconnect and cap.
John
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fuel pump
by: jerseyboy - Apr 10, 2015 6:22:39 GMT -5
Post by jerseyboy on Apr 10, 2015 6:22:39 GMT -5
One of the first things I did was remove the fuel pump and replace it with a petcock from Lowes,,after that I had no fuel delivery issues...then I moved up to a mikuni high volume fuel pump,,that thing will pump fuel 10ft up hill at low pressure.The stock pump is more like a valve petcock not a pump at all.
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fuel pump
by: lain - Apr 10, 2015 7:28:18 GMT -5
Post by lain on Apr 10, 2015 7:28:18 GMT -5
One of the first things I did was remove the fuel pump and replace it with a petcock from Lowes,,after that I had no fuel delivery issues...then I moved up to a mikuni high volume fuel pump,,that thing will pump fuel 10ft up hill at low pressure.The stock pump is more like a valve petcock not a pump at all. Well, I have a pretty new pump, I mean I installed it a few months ago when I thought I had fuel delivery issues back then. The new pump never made any difference though and back then it turned out to be a carb issue that's why I ended up getting my keihin carb. What kind of petcock did you get at lowe's? Could you link me so I can see if they have it at my local store? |
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fuel pump
by: lain - Apr 10, 2015 11:36:59 GMT -5
Post by lain on Apr 10, 2015 11:36:59 GMT -5
I raised the clip on the needle, it leaned it out a bit and now can idle at 1500, but it feels like there is a loss of power in the high end, but the low end is great again.
Have a mostly full tank right now, everything is so delicately balanced on my ride it seems.
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fuel pump
by: jerseyboy - Apr 10, 2015 15:57:26 GMT -5
Post by jerseyboy on Apr 10, 2015 15:57:26 GMT -5
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fuel pump
by: lain - Apr 10, 2015 16:47:26 GMT -5
Post by lain on Apr 10, 2015 16:47:26 GMT -5
How does this operate? Gravity feeds it when connected to a gas tank that is above it? What do I use in place of the fuel pump on the bottom of the tank to connect the hose to if not the fuel pump? Is there like some sort of connector for that as well or do I just connect it to the fuel pump? |
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