Adjusting Fuel Pressure?
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Simply turn the screw to adjust pressure, stock setting is 40-45psi with vacuum removed the regulator(engine idling) and this should not drop at WOT at any engine speed, if it does then you have a fuel delivery problem.. weak pump/clogged filter/bad electrical connection. Also note that adjusting pressure above the stock level will have no effect on engine operation in closed loop.. which is most of the time for any part throttle setting, the computer will counteract the increased pressure with shorter injector duty cycles to keep A/F ratios at the target of 14.7:1. The increased pressure will however richen the mixture in open loop mode with is what happens when the engine is under heavy load or at WOT.
Thread Starter
|
Freshman User
Joined: May 2003
Posts: 46
Likes: 0
Thanks, I didn't notice the screw driver slots on the top of the vacumn hose nipple... not mentioned in the instructions.
Google Project MPG, Four Wheeler Magazine to see what I'm trying to do...everything but the chip.
Thanks,
Bob
San Diego
Google Project MPG, Four Wheeler Magazine to see what I'm trying to do...everything but the chip.
Thanks,
Bob
San Diego
Thread
Thread Starter
Forum
Replies
Last Post
new7.3owner
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
6
Aug 18, 2014 10:25 AM
dyhrdford
1999 - 2003 7.3L Power Stroke Diesel
6
Dec 13, 2011 09:06 PM
Goodsath
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
1
Dec 9, 2002 11:54 PM
