08-20-2008, 07:17 PM #1
Fuel Pressure Gauge Is Not Stable
I have a fuel pressure gauge that is not stable. I have it set at 45 psi. When I turn the ski on, it is at 45. I start out flying and then a little while later I lose 50-100 rpm's. Every time I check my fuel pressure and the gauge is down around 40. I take it home and let it sit. Next time I start it up on the hose, it is right back at 45 psi right where I set it. I know that the drop in fuel pressure is the cause for my slight loss of power, but does anyone know why. I also don't want to run lean and F something up. Any ideas?
08-20-2008, 07:21 PM #2
buy a quality pressure reg and gauge
I suggest SARD
this one can do over 700hp
or even the smaller one only rated to 450 hp ,
this one will do fine,
its not the cheapest,
But can u put a price on loosing fuel pressure at WOT
I say start the bidding at $1000+ for engine repairs
but others use the Magna-fuel
Last edited by sirbreaksalot; 08-20-2008 at 07:30 PM.
08-20-2008, 07:34 PM #3
Thanks. I definitely have to think about which one to get. Mine is not cutting it.
08-20-2008, 08:48 PM #4
I have been thinking about your probs ERCKAWASAKI
these are the areas that your problem is in
1. Fuel pump to small or faulty, ( you did use a Walbro with pulley kit? )
What pump did you use?
2. Pressure regulator is not up to the job, ( this happens alot on cheap units, they are very inconsistent with the pressure they deliver)
If you can get me those spec's it will make diagnosing the problem easier
08-20-2008, 08:56 PM #5
I'll get that info tomorrow. Once I get that, I'll get back to you.
Last edited by ercBOOSTED; 08-20-2008 at 10:07 PM.
08-21-2008, 11:38 AM #6
- Join Date
- Jul 2007
08-21-2008, 08:37 PM #7
turbo smart fuel pressure regulator, the pump was from r&D it was a worlbro 255. Never had a problem with it coming loose. I don't have to adjust it at all. It is locked in on the spot I had it. It goes to around 40 psi after it heats up and when I start it the next day it is back at 45. I have a new regulator coming tomorrow or the next day. Hopefully that works. If not, a new fuel pump would be the next option.
08-21-2008, 11:18 PM #8
08-23-2008, 05:31 PM #9
I'm still waiting to find out about the other questions that you asked me, but today I set the fuel pressure at 48 psi and when I put it on the trailer to run the water out, it was down to 43-44 psi. So apparently it changes about 3-5 psi during my ride.
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