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May 31, 2011 | 07:26 PM

shawbran

Thread Starter

Cross-Country

Joined: May 2011

Posts: 81

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From: Holton

No Power

I just purchased a 1994 Ford F Super Duty. The truck is a 5 speed with a 460 EFI. Seems like the truck is low on power. It has a 4.63 rear end. When driving up hill's I lose 10 - 15 MPH, with downshifting into 4th gear. To me the truck should climb right up them with little speed loss. Here's what I have done so far:

New Plugs
New Wires
New Distributor Cap
New Rotor
New TFI module
New Fuel Filter
Lot's of injector cleaner

Any ideas where to go from here??

Last edited by shawbran; May 31, 2011 at 07:27 PM. Reason: Typos!!

May 31, 2011 | 10:36 PM

Conanski

FTE Legend

Joined: Jun 2006

Posts: 31,930

Likes: 1,499

From: Ottawa, Ontario

Tire size?
Codes present?
Ignition advance?
Fuel presure?

May 31, 2011 | 11:15 PM

Edgethis

Lead Driver

Joined: May 2009

Posts: 6,815

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From: Tobyhanma, PA

Could be a clogged cat.

Jun 1, 2011 | 08:24 PM

shawbran

Thread Starter

Cross-Country

Joined: May 2011

Posts: 81

Likes: 2

From: Holton

The truck didnt have a cat on it when I purchased it. I aint throwing any codes. The fuel pressure is in the low 40's.

Jun 1, 2011 | 10:17 PM

Edgethis

Lead Driver

Joined: May 2009

Posts: 6,815

Likes: 708

From: Tobyhanma, PA

Are there any other symptoms? Does it run hot?

Jun 1, 2011 | 10:25 PM

shawbran

Thread Starter

Cross-Country

Joined: May 2011

Posts: 81

Likes: 2

From: Holton

I can't find any other problems temp runs normal I'm at a lost.

Jun 1, 2011 | 10:26 PM

1992ford302

Freshman User

Joined: Jun 2011

Posts: 33

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maybe advance the timing a hair, or could be the motor is full of junk and needs a good cleaning... I would get a can of seafoam drive with it for est 50 miles and do a oil change on it, the slug could be holding you back some... Just some ideas but let us know if you figure it out!

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Jun 1, 2011 | 10:37 PM

1992ford302

Freshman User

Joined: Jun 2011

Posts: 33

Likes: 0

if the cylinder test numbers are low after a compression test put a cap full of oil in the spark plug hole and see if that made the test number go higher.