SnoWest Snowmobile Forum

SnoWest Snowmobile Forum (https://www.snowest.com/forum/index.php)
-   Polaris: IQ (https://www.snowest.com/forum/forumdisplay.php?f=216)
-   -   In need of fuel pump (https://www.snowest.com/forum/showthread.php?t=439079)

volcano buster 01-05-2018 04:16 PM

In need of fuel pump
 
2010 600 cfi-4

I'm experiencing some loss of fuel at WOT after a length of pull, either down a long road or on a steep hill. I put the gauge on the schrader valve and show 53#. Specs are 58-60# I believe. I have pulled the pump/pickup and checked that everything looked visually fine.

Any reason to drop over $500 for the Polaris unit with the intake or would a pump only replacement work fine?

I am finding two options:

Genuine Walbro pump - https://www.highflowfuel.com/i-23899...ategory:335702

Quantum pump - https://www.highflowfuel.com/i-23899...2008-2010.html

Obviously some price difference, but a heck of a lot cheaper than OEM with all the giblets.

Thoughts?

XCaSSAULT 01-05-2018 04:21 PM

I assume youíve replaced the filter? Maybe replace the sock in tank as well even if it looks fine.

volcano buster 01-05-2018 04:27 PM

I have been changing the fuel filters out about every 600 miles.

No "sock" in the tank. It has two pickup points that act as back-flow valves. When I pulled the unit out of the tank, they were holding fuel.

XCaSSAULT 01-05-2018 05:01 PM

No sock in tank?! Wow Iíd imagine youíd have to have some filtering before the pump. Maybe it fell off and is in the tank? Whatís he diff between those two pumps in your links? Im cheap so thereís no way Iíd give polaris $500, Iíd go with one of those two options

Merlin 01-05-2018 05:47 PM

Sorry VB, I've got no experience either with this particular application but I'd be willing to try the jobber pump cause damned if I'm going to give Polaris $500 for the assy.

Not sure what problem you're having but I wonder if 53 PSI is actually low enough to cause an issue. I know you mentioned the specs. were 58 - 60 PSI but sometimes you can get away with lot less than factory specs. before you notice a runnability issue.

Just a thought.....

volcano buster 01-05-2018 07:40 PM

I fibbed a little. This is a Carl's 660.

It happens when I have been WOT for a period of time and acts like it is dropping a couple injectors (or something) and I have to back out of the throttle and give it a chance to catch up again. Going up the road isn't a big deal but climbing isn't always done at the most opportune time. I'm thinking 52-53# is a possibility as to why it starts to fall down at WOT.

XCaSSAULT 01-05-2018 07:44 PM

New plugs gapped right? Fresh gas? Clean ves?

Merlin 01-05-2018 07:45 PM

That makes sense.

Big bore & accompanying tune might not be as tolerant to lower fuel pressure.

volcano buster 01-05-2018 07:54 PM

Quote:

Originally Posted by XCaSSAULT (Post 4118363)
New plugs gapped right? Fresh gas? Clean ves?

Yep, yep and yep

TRS 01-05-2018 10:01 PM

Replacement pump is fine, make sure your FPR isnít bad.

SRXSRULE 01-05-2018 10:31 PM

FYI.... That walbro pump is 100 bucks on amazon.

https://www.amazon.com/Walbro-Inline...eywords=GSC404

volcano buster 01-05-2018 10:49 PM

Quote:

Originally Posted by TRS (Post 4118418)
Replacement pump is fine, make sure your FPR isnít bad.

How should I go about testing the FPR?

LoudHandle 01-06-2018 12:58 AM

I have at least one complete pump available, everything that installs into the tank.
 
I have at least one take out that I'd let go fairly cheap as I'll never use the older style pump again. Everything I own is the MY'13 and newer pump. PM if you'd like to entertain a full replacement.

mountainhorse 01-06-2018 01:17 AM

Does the pump look like this ?

From what I can tell... the **404 designation pumps are only rated to 36psi... you need a 58psi pump.
GSC404... 80 ltr/hr (21 gal/hr) at 250 kPa (36.25 psi)

The one that SRX posted up on amazon is a better fit.


BTW... What voltage are you seeing at the pump with it running off the sled?

Specs:
http://autoperformanceengineering.com/html/fppumps.html







.

diamonddave 01-06-2018 01:53 PM

I might have a 2010 assembly laying around. I'll take a look.

volcano buster 01-06-2018 02:48 PM

Disassembled:

Pump looks like either the F20000286 or F20000107 from the link that MH supplied (I'm assuming it is actually the same picture).
I'm curious here though, as they are the same pressure but significantly different volume pumps.

mountainhorse 01-07-2018 12:16 PM

Not going to hurt to use the higher flow pump.... It will draw more amps though as it will push more fuel through the system... with the regulator at the end of the line keeping the fuel pressure at the set pressure.

Are you sure the Voltage is good and the FPR is good for the 58 PSI (4 bar) ??




.

73 Starfire 01-07-2018 03:09 PM

Where is the fuel pressure regulator? I see nothing identified as such in the parts fiches.

volcano buster 01-07-2018 03:12 PM

I just pressed the pump out of its carrier. F20000286

I was not sure how to verify the pressure of the regulator.

I also tested the output of my transformer that I used to test the pump. 17.5V and as stated, 10.4 watts.

volcano buster 01-13-2018 03:35 PM

Maybe I'm chasing the wrong symptoms.

I cut a male end off an old fuel filter, and welded the filter end shut. I could then insert this in the return line to the tank. 12V juice off my pickup and the pump pressure hit 80-100psi immediately. Take the line plug out and install back to the tank and it would run about 60-61 psi.

Hooked back up for the sled to run, and it showed 59 psi ( osculated while running at idle, but 59 when I shut it off).

If this is checking out, I'm not sure how to check the voltage/amperage to the pump at WOT.

I am running SPI filters. Any chance they are flow restrictions at WOT?

XCaSSAULT 01-13-2018 03:57 PM

I run a spi filter with out any issues. 59psi should be good.

diamonddave 01-14-2018 10:40 AM

Iíve been running SPI filters as well.

Good multimeter to Check Amp draw. Just be certain youíre checking it correctly or you can burn up your meter.

diamonddave 01-14-2018 10:44 AM

Btw, isnít this a 4 injector motor? If so, that system was plagued with Voltage Regulator issues. I used to carry one in my backpack. I think Eric already asked have you checked Voltage at the pump?

volcano buster 01-15-2018 08:29 AM

I replaced the VR a couple years back.

Any suggestions on testing the voltage at the pump if it is a process that can burn out my meter? Would there be a difference between idle and 6-7,000 RPM? Or at least a need to check both?

Merlin 01-15-2018 08:00 PM

Testing the voltage will not harm your meter even if it is higher than anticipated.

Testing the amperage with the meter connected in series can be an issue if you exceed the meter's capacity. In that case you may burn the internal fuse.

I'm not familiar with the wiring on that machine but you might be able to back probe the fuel pump connector & then run the sled on a track stand. Paying close attention to the voltage as you vary the engine speed.



Quote:

Originally Posted by volcano buster (Post 4121977)
I replaced the VR a couple years back.

Any suggestions on testing the voltage at the pump if it is a process that can burn out my meter? Would there be a difference between idle and 6-7,000 RPM? Or at least a need to check both?



All times are GMT -6. The time now is 06:48 PM.


All contents copyright 2007-2017, SnoWest Magazine, Harris Publishing Inc.