80-96-list-digest Tuesday, June 30 1998 Volume 02 : Number 227



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Ford Truck Enthusiasts - 1980-1996 Trucks and Vans
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In this issue:

re: FTE 80-96 - Diesel Stumbling
FTE 80-96 - Vapor Lock
RE: FTE 80-96 - Vapor Lock?
Re: FTE 80-96 - Vapor Lock
FTE 80-96 - Re: F-250 popping sound
Re: FTE 80-96 - Re: F-250 popping sound
FTE 80-96 - Speedo. Recal.
FTE 80-96 - Transmission Question
Re: FTE 80-96 - Transmission Question
RE: FTE 80-96 - Re: F-250 popping sound
Re: FTE 80-96 - Transmission Question
Re: FTE 80-96 - Vapor Lock
FTE 80-96 - Add a leaf up front
FTE 80-96 - TEST New e-mail software

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Date: Sun, 28 Jun 1998 18:53:06 EDT
From: benamil juno.com (David Bennett)
Subject: re: FTE 80-96 - Diesel Stumbling

Charlie
I have an 85 6.9L and a 90 7.3L that I put a lot of miles on. I had some
starting problems and a bit of the smoke like you describe. My first
guess was deposits in the injectors or pump. I started adding a pint of
Marvel Mystery Oil as a fuel additive in every fill up. The problem
stopped after a couple of tanks. Other diesel fuel treatment can
probably work as well. Just so long as it cleans and lubricates the pump
and injectors.

During those first couple of tanks I actually added a quart to each tank.
It's worth a try before you start pulling out the injectors or looking
at servicing the injector pump.

Good Luck
Dave Bennett


You wrote:
>>
My 1985 F350 diesel with 120k started losing power and putting blue smoke
out the exhaust. My first thought is injector pump or fuel injector
problems. Does this sound right?
Charlie B
>>

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Date: Mon, 29 Jun 1998 09:31:48 -0400
From: "Skerrett, Michael"
Subject: FTE 80-96 - Vapor Lock

Date: Sat, 27 Jun 1998 09:17:53 -0600
From: "Linda Lawrence"
Subject: FTE 80-96 - Vapor Lock?

My 1985 F 250, with a 351 modified Cleveland (1978), is vapor locking =
in
the 95+ NM heat. Anyone with experience/ideas would be appreciated. =20

All these suggestions are good but if the gas is already boiling when =
it
gets to the fuel filter it is getting heated a long way before the =
engine
> compartment. Have a look all the way back along the fuel line to the =
tank.
I think you will find that the exhaust is heating the fuel line either =
by a
leak in the muffler or the pipes. Ford is famous for running fuel, =
brake
> and electrical lines all together along the chassis. Nothing wrong =
with
that until something like a leak in the exhaust happens. Air flow =
through
the engine compartment should be sufficient to keep the fuel from =
boiling
even in the hottest weather. Remember your engine is operating at =
about
180=B0-220=B0 even in the winter. Keep the fuel cool from the tank to =
the
firewall and you should have no further problems.

I found this out the very hard way (ever try getting a ride on Hwy. 84
between Muleshoe and Clovis at 2:00 am?)


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Date: Mon, 29 Jun 1998 08:22:56 -0600
From: "Smeins, Larry"
Subject: RE: FTE 80-96 - Vapor Lock?

What you are experiencing is a problem common at higher altitudes during
high temperatures. First get the fuel lines and filter as far away from
the engine heat as possible. Make sure the recirculating fuel line is
open and working. You do have a recirculating fuel system don't you?
Insulate the fuel lines and filter if possible. Don't use fuels with
alcohol or methanol in the summer. A common fix on motorhomes, vapor
lock is a big problem for them, is to place an electric fuel pump at the
tank end. Sometimes adding a gallon of diesel to a tank of gas will
help. Not recommended for catalytic equipped engines.

Larry

>Date: Sat, 27 Jun 1998 09:17:53 -0600
>From: "Linda Lawrence"
>Subject: FTE 80-96 - Vapor Lock?

>My 1985 F 250, with a 351 modified Cleveland (1978), is vapor locking
in
>the 95+ NM heat. Anyone with experience/ideas would be appreciated.
>Took
>us all day to get back home, cooling it down with water over
theradiator
>and ice cubes on the fuel line, which runs across the top of the
engine.
>Fuel in the fuel filter appeared to be boiling.

>Thanks for any help.

>Roger
>Laguna, NM

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Date: Mon, 29 Jun 1998 10:37:09 -0400
From: "David H. Archer"
Subject: Re: FTE 80-96 - Vapor Lock

I used to own a 1982 Ford F-250 with a 351 Windsor, and it also had a series
vapor lock problem.
The only thing I did to correct the problem was I rerouted the fuel line
from the fuel pump to the carburetor away from the engine the best I could,
and I started using a better grade of gasoline.
I never had any more problems!

Dave

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Date: Mon, 29 Jun 1998 08:35:52 -0700 (PDT)
From: Randall Wer
Subject: FTE 80-96 - Re: F-250 popping sound

I was the one that had the post about the sound awhile back. The problem
you describe sounds exactly like what mine was, and still is, doing.
Could it be something with the suspension? If anybody has ANY ideas, they
would be appreciated!

Randy Werth
'90 F-250 4x4

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Date: Mon, 29 Jun 1998 09:00:50 -0700
From: Robert Kennedy
Subject: Re: FTE 80-96 - Re: F-250 popping sound

>From a shade tree-er;

If it is a suspension problem, standing on the front bumper and bouncing up
and down should re-create the noise. If so, get some one else to do it
while you investigate from one side to the other..

If it is a frame problem, you may have to set the parking brake, then
slowly let out on the clutch,(stick?). As you slowly increase the throttle,
see if you can re-create the noise this way.

Either way, if unsuccessful, try turning the wheels to both sides to
attempt the re-creation.

If the wheel turning works, jack up the front-end, put it on a good pair of
jack stands and work each tire up and down, then left and right, this
could reflect bad steering components.

Good luck!

My .02,

Bob


At 08:35 AM 6/29/98 -0700, you wrote:
>
>I was the one that had the post about the sound awhile back. The problem
>you describe sounds exactly like what mine was, and still is, doing.
>Could it be something with the suspension? If anybody has ANY ideas, they
>would be appreciated!
>
>Randy Werth
>'90 F-250 4x4
....

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