Mechanics

ANYONE KNOW MUCH ABOUT DIESEL? !!

Ford F-250

Allright here goes I got a 84 ford 250 69 diesel 140,000 miles. Had run great untill recently I ran it out of diesel about a month ago but it was fine I just reprimed it and got it goin. But now recently it has just stopped running I went to start it and it turns over fine but it just wont start I have tried everything I replaced the diesel pump, the diesel injection pump, new brushes on the starter(which was needed) had a guy try and time it which he said it was fine and didnt need anything. Replaced batteries. I have done all the main big things so now im thinking it has to be something small I cant think of. The glow plugs are fine I tested them and they are working great the block heater works also plenty of diesel inside tank it pumps it great it just wont pop the injectors and I dont know why!

Please any info or idia's please reply.

thanks hey wire.
Avatar
Hey_wire
January 7, 2007.



I forgot to mention I have now retimed it 3 times I cant figure out what it is at all I called the company that I got my injection pump from they say I have done everthing right so to send it back I really really do not want to take it off and send it back just to get another working pump if it isnt the pump that is

ANY IDEA'S!

Tiny
Hey_wire
Jan 8, 2007.
I'm not sure where it's located on light trucks, but heavy trucks have a fuel pump shutoff solenoid. I would look in that direction. If that goes bad it won't start. Good luck

Tiny
Bootdog
Jan 9, 2007.
I did a little research at work today. I don't know too much about smaller diesels, I mostly work on the heavy equipment, and I found out that smaller diesels don't have a shut off solenoid. It's internal in the injection pump. Anyway that motor should have an external fuel pump also, seperate from the injection pump. Make sure thats working. If so, then make sure you have all the air out of the fuel system. It only take a little bit of air to make the engine not start. Keep bleeding out the air at the injection pump, chances are I think there's still air in the system. Good luck

Tiny
Bootdog
Jan 9, 2007.
Yes I completely replaced the external pump after I was going through the process of replacing the injection pump I dont think it was a matter of air either I bleed out lots and lots of diesel its pumping really slow so I went ahead and took of the injection pump after all and shiped it back they are sending me a different one I asked them to do a diagnostic on the injection pump I sent back and see if it was the pump if not I still got problems any other idea's would be very very help ful I am running out of idia's I talked to the ppl incharge of the company they said it sounded like I did everything right that it was probly just the pump so im hoping there right cause those injection pumps on the 6.9. Are a pain to get off and PUT back on.

Thanks for the info I appreciate it any other ideas would be helpful thanks.

Hey wire

Tiny
Hey_wire
Jan 13, 2007.
When the inj pump is back on and static timed correctly, leave all of the fuel lines loose at the injectors, crank the engine over and close each inj line as it starts squirting fuel and when most are primed it should start. The 6.9 is VERY sensitive to failed glowplugs, I would check them all again by unplugging them and use a test light clipped to positive and touch each plug tip, the ones that light are good the ones that don't, aren't. At temps below 60deg you should get glow plug activation of around 9-12 seconds then pulsing, good luck

Tiny
Heavyduty
Jan 14, 2007.
Yes I did all of which allready I think it was the pump the glow plugs are working fine I replaced the 2 years ago and tested them they are all working same with the block heater thanks for commenting

any other suggestions would be great

Tiny
Hey_wire
Jan 15, 2007.
I agree be sure all air is out of system, also are you sure the shut-off solenoid is being activated? Check current to solenoid try hot wiring it if necessary to be sure it engages. If wires are frayed or poor connection it may carry voltage but not enough amps to activate soleniod, especially when cranking.

Tiny
Roger Miller
Feb 9, 2007.
Did you replace the injectors themselfs or make sure that there clean. If there not atomizing fuel properly then startin isn't really an option. Also this may sound very simple. But make sure that the fuel filter is on there nice and tight and that there's no place that any air can get into the system. Cuz we all know how much diesel's " love" air.

Tiny
SirGibby
Feb 21, 2007.