lean 460

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Nov 1, 2004 | 07:32 PM

someday

Thread Starter

Fleet Mechanic

Joined: Feb 2004

Posts: 1,379

Likes: 9

From: midwest

lean 460

i have done a few mods over the years to my 89 460 efi and notice that my ford platimun spark plugs (gap .044) show it is running lean- grayish color around insulator. it has headers, banks cat back, edelbrock throttle body, k&n filter, msd coil, taylor wires, and until recently an msd 6a that broke.
should there be anything to be concerned about?

Nov 1, 2004 | 08:24 PM

airharley

Postmaster

Joined: Nov 2001

Posts: 3,351

Likes: 1

From: Escondido, CA

You haven't listed a new or reworked air meter. Did you reprogram the computer too? The better airflow you have with the rest of the mods may not go so well with the old air meter.

Nov 1, 2004 | 10:04 PM

someday

Thread Starter

Fleet Mechanic

Joined: Feb 2004

Posts: 1,379

Likes: 9

From: midwest

are you talking about the air charge temperature sensor? that is the only thing i can think of in terms of air meter on this truck and i dont know any way to reprogram the computer or get a new air meter

Nov 3, 2004 | 03:59 PM

kevinrf250

Senior User

Joined: Oct 2002

Posts: 441

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From: Montana

Get an adjustable fuel pressure regulator and turn up your fuel pressure. I did this on my truck and it fixed the lean problem.

Nov 3, 2004 | 07:53 PM

someday

Thread Starter

Fleet Mechanic

Joined: Feb 2004

Posts: 1,379

Likes: 9

From: midwest

is running lean a problem?

Nov 4, 2004 | 12:36 AM

kevinrf250

Senior User

Joined: Oct 2002

Posts: 441

Likes: 0

From: Montana

Running lean makes the engine run hotter than needed. I know in a snowmobile you can blow a motor if it is too lean, I would think that a truck motor would be the same. I am sure someone else could give a more detailed explination than I can.