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Fuel pressure issue.

Discussion in 'Stock 1995 - 2001 Explorers' started by poksmot_420, August 27, 2011.

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  1. poksmot_420

    poksmot_420 New Member

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    i have a 2001 ex sport 4.0 , i think my fuel pump is going bad so i checked the pressure, hooked up gauge turned on the key and got 40 psi, started the truck and got 62 psi. but at WOT it drops to 40psi, and after idling for a few min the needle will bounce from 60 to 62... is this normal??? the problems i have been having is first start up after sitting for a long time is rough, and a couple times last week when i pull out of somewhere fast it cuts out then starts to go again. any ideas????
     
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  3. BrooklynBay

    BrooklynBay Moderator & long time member. Staff Member Moderator Elite Explorer

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  4. Lube

    Lube Active Member

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    Replace the filter and clean the MAF.
     
  5. yavapaires

    yavapaires Active Member

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    Does your EX have a vacuum controlled fuel pressure regulator? If so, check for vacuum leak, or pressure regulator is going bad. Plus the above posts about the filter.
     
  6. poksmot_420

    poksmot_420 New Member

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    Well I changed plugs, wires and cleaned throttle body, was running great for a few days until I took a long trip today, it wanted to stall when rpm dropped under 2000, so I pulled of the road and hooked up fuel pressure gauge to see what was going on. It idled rough but didn't stall, everytime the rpm would drop the pressure gauge dropped to 20psi then back to 60psi... so I let it sit for an hour or so started it up and it drove fine for about half hour.... so I think fuel pump is going.... any ideas before o replace pump.....
     
  7. ranger7ltr

    ranger7ltr Elite Explorer

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    Did you replace the fuel filter yet?
     

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