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Old 07-18-2015, 03:29 PM   #1
Aunnest
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Fuel pressure gauge

Enlighten me all mighty moto gurus. I have a multi use pressure gauge. It's a 1-10. I used it to check my fuel pressure and upon my fuel pump priming I'm getting a 8... Is that 8 psi 80 psi? Regardless i m pretty sure I'm suppose to be at about 44 ish. And also when inspecting my o rings on my fuel pump one is a little torn? Explanations and theories please?
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Old 07-18-2015, 04:03 PM   #2
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it should say on the gauge......and where are you tapping into the fuel rail?
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Old 07-18-2015, 04:12 PM   #3
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1reads 1 to 10? Probably bar units. 1 bar is about 14.5 psi
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Old 07-18-2015, 04:13 PM   #4
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Gauge sounds fishy
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Old 07-18-2015, 05:11 PM   #5
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Quote:
Originally Posted by BYRDMAN View Post
it should say on the gauge......and where are you tapping into the fuel rail?
Because I was having a problem that feels and nseems fuel related yet every fuel component from the tank to the injectors have been replaced and fixed. Therefore I wanted to make sure my pump was pushing hard as it should be.
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Old 07-18-2015, 05:17 PM   #6
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Quote:
Originally Posted by cuong-nutz View Post
1reads 1 to 10? Probably bar units. 1 bar is about 14.5 psi
8 bar sounds kinda high for fuel pressure?
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Old 07-18-2015, 05:18 PM   #7
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Quote:
Originally Posted by gots2no View Post
8 bar sounds kinda high for fuel pressure?
indeeed. funny guage

Didnt OP replace fuel pump and is having fueling issues?
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Old 07-18-2015, 06:50 PM   #8
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My gauge reads psi
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Old 07-18-2015, 06:56 PM   #9
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Quote:
Originally Posted by Aunnest View Post
Because I was having a problem that feels and nseems fuel related yet every fuel component from the tank to the injectors have been replaced and fixed. Therefore I wanted to make sure my pump was pushing hard as it should be.
U mistaked my where for what....



Where did u hook up the gauge. Post pics
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Old 07-18-2015, 07:03 PM   #10
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Quote:
Originally Posted by BYRDMAN View Post
U mistaked my where for what....



Where did u hook up the gauge. Post pics
The line running from my pump at the bottom of my tank that goes into my fuel rail. I simply unhooked it from my fuel rail and plugged the gauge ast the end of the line then put my bike to the on positionf4096aa0a708f0e4e368fb138a00653d
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Old 07-18-2015, 08:52 PM   #11
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Anyone? Someone give me the thumbs up to get a new fuel pump... Or at least new o rings xD
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Old 07-18-2015, 09:17 PM   #12
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Fuel pressure gauge

https://actron.com/sites/default/fil...lish_16176.pdf

That gauge is confusing.

Either way pressure should stay consistent when you rev. It shouldn't drop. If it does, it's your pump. Also a rusted tank will kill your pump too. Check to see if the filter/screen is clogged
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Old 07-18-2015, 10:28 PM   #13
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Fuel pressure gauge

That gauge is meant for carbureted car engines and is pegged out . You need one scaled to about 100 psig to get a real fuel pressure reading.
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Old 07-18-2015, 11:12 PM   #14
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Quote:
Originally Posted by DLite View Post
That gauge is meant for carbureted car engines and is pegged out . You need one scaled to about 100 psig to get a real fuel pressure reading.
Now that sir. Is enlightenment thank you
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Old 07-19-2015, 12:45 PM   #15
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What is the issue that you are having that makes you think there is a fuel delivery issue ?
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Old 07-19-2015, 09:59 PM   #16
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Quote:
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What is the issue that you are having that makes you think there is a fuel delivery issue ?
Rough idle. Dies on idle. Power loss. At red lights it dies. When it idles if ii give it has it stumbles then dies. When I take off from lights there's a 50\50 chance it goes or stumbles and dies. I mean I came to the conclusion of piston rings are trashed. But googling around got me really curious. As to where my pressure sits. It's a new fuel pump yet a o ring looks pretty cracked and ripped.
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Old 07-19-2015, 10:02 PM   #17
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Piston rings? Does it smoke? It would most likely smoke like a train if this was a ring issue bad enough to
Cause what you describe.
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Old 07-20-2015, 12:40 AM   #18
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Quote:
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Piston rings? Does it smoke? It would most likely smoke like a train if this was a ring issue bad enough to
Cause what you describe.
One day on the way to work I gunned it on the green light it didn't rev past 9k kinda just lost power like redline... when I let off the gas I looked back and had white smoking just blowing out the exhaust but it stopped after about 30 seconds or so... Never happened again. But after that day it never reved that high again?
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Old 07-20-2015, 06:52 AM   #19
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So are there 2 people with the same issue or 1 person with 2 screen names?
Pretty weird 2 people would have a cracked o-ring an a brand new fuel pump...
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Old 07-20-2015, 07:35 AM   #20
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Quote:
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So are there 2 people with the same issue or 1 person with 2 screen names?
Pretty weird 2 people would have a cracked o-ring an a brand new fuel pump...
Convienent if you ask me ... Although I'm just curious because I'm doing a motor swap for this reason. And just felt as if this could be a possibility and avoid the whole swap. After talking to some members everyone is shooting me towards piston rings :(

Last edited by Stancedsi; 07-20-2015 at 07:40 AM.
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