another ford tech ?

[tie_one_on]

'00 Explorer 4.0L OHV. Fuel pump pressure 65 lbs key on engine off 65 lbs engine idling. Is this a problem? Too high? Thanks.

 

[Reel Poor]

Re: another ford tech ?

65 lbs with the key off is right. I don't have the specs for engine running pressure but if vacuum is available at the fuel pressure regulator port the pressure should drop. I would expect to see a 5-8 lb drop while idling. Check the vacuum hose to the regulator for fuel contamination with the engine off, and vacuum present when running.

 

[Rancherlee]

Re: another ford tech ?

Every EFI ford I've worked on (except the 4.9L 300 Inline six) should have 39psi +/- 1psi at idle with the vacuum line removed.

 

[Reel Poor]

Re: another ford tech ?

Every EFI ford I've worked on (except the 4.9L 300 Inline six) should have 39psi +/- 1psi at idle with the vacuum line removed.

Here's another, and it's +/- 8 psi.

 

[tie_one_on]

Re: another ford tech ?

Thanks for the replies guys. So I need to remove the vacuum line to the regulator when checking the ilde pressure?