Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Mikegold on July 24, 2011, 10:10:35 AM

Title: jeep fuel system
Post by: Mikegold on July 24, 2011, 10:10:35 AM

 :jump_125: I have a jeep cherokee 2.5sport with no fuel at the rack Rac said fuel pump is running,Put four gallons in so can`t be low on petrol, where do I look first?

Title: Re: jeep fuel system
Post by: Nosebolt on July 24, 2011, 11:53:44 AM

filters

Title: Re: jeep fuel system
Post by: bigjeepzj on July 24, 2011, 12:22:42 PM

if its not that it could be the pressure regulator valve in the tank

Title: Re: jeep fuel system
Post by: Mike Pavelin on July 24, 2011, 05:53:46 PM

First verify the RAC is right. Turn the ignition on and off a couple of times, then find the test port on the fuel rail (a large Schraeder valve) take the dust cap off and press the middle, you should get fuel squirt into your eye at 40psi. If there's no fuel or just a dribble turn the ignition off, pull the fuel relay out and jump the 2 large terminals. The pump should now run continuously so you can listen for it. If it's running but still no fuel pressure it could be the pump itself, the regulator on the fuel rail (pre 97) or on top of the pump (97 on), or the filter (inline underneath pre 97) or incorporated in the regulator (97 on). Oh, and first of all,  make sure you have a spark when cranking , if you haven't it isn't the fuel system, but probably a sensor gone down.

Title: Re: jeep fuel system
Post by: JamesH on July 25, 2011, 11:42:39 AM

what he said!

Title: Re: jeep fuel system
Post by: willo on July 31, 2011, 06:53:13 PM

 :iagree: :iagree:

Mike beat me to it, my thoughts exactly! Yeah right  :lol_hitting:

Title: Re: jeep fuel system
Post by: isle of man on July 31, 2011, 06:56:17 PM

If no spark and no fuel it's the CPS....