eng. missing under coast condition?
Thread Starter
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Senior User
Joined: Aug 2007
Posts: 110
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by power surge do you mean an increase in rpm? all i know is that when you are doing about 55 and you left off the fuel say when you are going down hill, it starts to buck pretty bad. when you step on the fuel again it clears right up. kinda weird to me, never really run into this before. i am getting a slight amout of white smoke, but there was some old fuel in the tank when i bought it. its definately not drivetrain related. also i noticed that my fast idle doesnt want to kick down(cold start advance probly isnt turning off either, maybe this has something to do with it?) anybody have the part number for temp sensor that controlls the fast idle and cold start advance.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
Make sure the connector is plugged on on the coolant temp switch.
The way it comes out of the harness, it is rather easy to pull the connector off the switch while changing the glow plugs.
For the bucking/misfire problem, my first line of attack would be a triple strength dose of Diesel Kleen in one tank.
Run that for a day, then change the fuel filter.
When you change the filter, fill it with straight Diesel Kleen.
The engine will run a little funny on straight Diesel Kleen, but a minute or two idling will get fuel back in the system and everything will go back to normal.
And hopefully the missing/bucking will be gone before the tank of fuel is gone.
The way it comes out of the harness, it is rather easy to pull the connector off the switch while changing the glow plugs.
For the bucking/misfire problem, my first line of attack would be a triple strength dose of Diesel Kleen in one tank.
Run that for a day, then change the fuel filter.
When you change the filter, fill it with straight Diesel Kleen.
The engine will run a little funny on straight Diesel Kleen, but a minute or two idling will get fuel back in the system and everything will go back to normal.
And hopefully the missing/bucking will be gone before the tank of fuel is gone.
Thread Starter
|
Senior User
Joined: Aug 2007
Posts: 110
Likes: 0
Make sure the connector is plugged on on the coolant temp switch.
The way it comes out of the harness, it is rather easy to pull the connector off the switch while changing the glow plugs.
For the bucking/misfire problem, my first line of attack would be a triple strength dose of Diesel Kleen in one tank.
Run that for a day, then change the fuel filter.
When you change the filter, fill it with straight Diesel Kleen.
The engine will run a little funny on straight Diesel Kleen, but a minute or two idling will get fuel back in the system and everything will go back to normal.
And hopefully the missing/bucking will be gone before the tank of fuel is gone.
The way it comes out of the harness, it is rather easy to pull the connector off the switch while changing the glow plugs.
For the bucking/misfire problem, my first line of attack would be a triple strength dose of Diesel Kleen in one tank.
Run that for a day, then change the fuel filter.
When you change the filter, fill it with straight Diesel Kleen.
The engine will run a little funny on straight Diesel Kleen, but a minute or two idling will get fuel back in the system and everything will go back to normal.
And hopefully the missing/bucking will be gone before the tank of fuel is gone.
Hotshot
Joined: Oct 2002
Posts: 18,488
Likes: 22
From: The Big, Oregon
How are the motor mounts and tranny mount, and does the shifter move when this happens? It almost sounds like a separated mount on the right hand side.
Doing it in 4th only pretty much rules out the tranny, since that is direct drive, no power going through gearing aside from the rear end.
Doing it in 4th only pretty much rules out the tranny, since that is direct drive, no power going through gearing aside from the rear end.
Thread Starter
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Senior User
Joined: Aug 2007
Posts: 110
Likes: 0
i will look everything over again but i am almost positive it is a engine miss. anyone have that part number for the temp sensor that controls the high idle and cold start advance? with the engine at full operating temp. the high idle and cols start advance will not shut off.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
Here is the info from another post, looks like that switch may be getting hard to find.
PLC7.3
Postmaster Join Date: Nov 2004
Location: Manitoba
Posts: 4,114
The engine temp switch is known as:
E8TZ9E939A $48.00 sell $36.00
SWITCH FUEL INJ SYS
That is the switch that allows power to the fast idle and timing advance until the engine rises to 112*F then is opens and shuts off power........ You could use a wire and switch to operate it temporarily..... just use spade terminals in each of the connector holes wired through a switch...... run with it on until the engine "warms" or you drive away.
Online dealers might have a listing, but the ones I frequent don't show it now.
HOWEVER THE DIRECTFORDPARTS SPONSOR ON THE LEFT SHOWS IT BY PART # Give him a chance......
E8TZ9E939A $49.13 $0.00 $26.05
__________________
93 F250 SC 4x4 E4OD 355LS
PLC7.3
Postmaster Join Date: Nov 2004
Location: Manitoba
Posts: 4,114
The engine temp switch is known as:
E8TZ9E939A $48.00 sell $36.00
SWITCH FUEL INJ SYS
That is the switch that allows power to the fast idle and timing advance until the engine rises to 112*F then is opens and shuts off power........ You could use a wire and switch to operate it temporarily..... just use spade terminals in each of the connector holes wired through a switch...... run with it on until the engine "warms" or you drive away.
Online dealers might have a listing, but the ones I frequent don't show it now.
HOWEVER THE DIRECTFORDPARTS SPONSOR ON THE LEFT SHOWS IT BY PART # Give him a chance......
E8TZ9E939A $49.13 $0.00 $26.05
__________________
93 F250 SC 4x4 E4OD 355LS
