Forum Discussion

MrWizard's avatar
MrWizard
Moderator
May 12, 2019

correct part number needed

For Ford 1996 F53 460"
With externally mounted tiff ICM
Finally got the right one ICM DY1077
Also installed new OEM motorcraft fuel pressure regulator
Pulled pcm relay and fuel pump relay cleaned terminals and swapped relays around
New distributor cap and rotor

Still having poor acceleration power problems

Fuel system checks ok, except Ned to have a pressure test done

Starts easy, idles smooth, obviously diagnostics give no engine problems or pcm problems
Class A
  • newman_fulltime's avatar
    newman_fulltime
    Explorer II
    May 12, 2019
    Partially clogged catalytic converter or exhaust in general what it sounds like to me. The engine either needs more air in or more air out if no codes showing . Every fuel pump I ever seen go bad once it gets hot it shuts off . poor power is also a sign of clogged fuel filter but hard starting is a sign for that
  • RLS7201's avatar
    RLS7201
    Explorer II
    May 12, 2019
    As you well know from being on the forum for many years, the fuel pump on those old 460 F53 are prone to failure. I'm sure you also know the fuel pressure test needs to be done while driving at WOT. Should maintain about 32#. NO catalytic on 94-97 F53.

    Richard
  • Corkey05's avatar
    Corkey05
    Explorer
    May 12, 2019
    I'm just throwing this out as food for thought.

    A stuck heat riser (stuck partially closed) ... I remember dealing with that years ago.
  • MrWizard's avatar
    MrWizard
    Moderator
    May 12, 2019
    Fuel filter was the first thing I replaced
    Resonator no Cat Converter
  • Bruce_Brown's avatar
    Bruce_Brown
    Moderator
    May 12, 2019
    RLS7201 wrote:
    As you well know from being on the forum for many years, the fuel pump on those old 460 F53 are prone to failure. I'm sure you also know the fuel pressure test needs to be done while driving at WOT. Should maintain about 32#. NO catalytic on 94-97 F53.

    Richard


    And they tend to work intermittently a lot too, until final failure.

    Right when you think you've found the problem they act up again.

    We fought the battle until we finally changed both fuel pumps, added a partial Banks kit, and took care of the converter.
  • MrWizard's avatar
    MrWizard
    Moderator
    May 13, 2019
    i'm thinking of the distributor, because i sometimes get a PIP code error

    but NOT every time

    i also some times get a secondary fuel circuit error

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