Polaris ATV Forum - View Single Post - 07 800 fuel pump test
View Single Post
post #9 of (permalink) Old 07-13-2014, 05:24 AM
Extreme ATV Enthusiast
WalterS's Avatar
Join Date: Mar 2011
Location: Shenandoah Valley,Virginia
Posts: 337
I believe initial pump cycle is timed and not pressure dependent. After efi senses rpm and pump is turned back on, it stays on and any fuel beyond what is needed to maintain the specified fuel pressure is dumped back into the tank by the regulator. This is why a weak regulator may cause a failure to build initial pressure.

2007 Sportsman 800
1500 miles, mostly at Hatfield-McCoy trails, WVa.

Last edited by WalterS; 07-13-2014 at 05:33 AM.
WalterS is offline  
For the best viewing experience please update your browser to Google Chrome