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What is causing my van to shake and lose power between 50 and 60 mph

Tiny
TROMBO31
  • MEMBER
  • 2001 FORD E-SERIES VAN
  • 90,000 MILES
I have a 2001 Ford E-350 xlt extended van (v8/5.4) that has been running great up until the last couple of months. It does have oil leak issues, but I have kept it full and haven't had troubles until we took a trip in very hilly country with a heavy load. The van works fine at low speeds and above 60 mph or when accelerating or going up hills in high gears, but when between 50-60 mph in lower gears it shakes and loses power.

Any idea what is causing this?

Thanks!
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Friday, September 9th, 2011 AT 1:55 PM

1 Reply

Tiny
PROMECHANIC
  • MECHANIC
  • 536 POSTS
Hmmm. This sounds like maybe a fuel system problem. If you want to know for sure you can get a fuel pressure gauge that you can tape to your windshield. Then drive it and see if it loses fuel pressure when the problem happens.
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Friday, September 9th, 2011 AT 5:44 PM

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