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Truck diagram of man engine

Truck does not want to start only if you use the primer pump it starts when you switch it of you must primer it again to start it seems like there is no diesel staying in the pump

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  • 293 Answers

You got it in one, you have an air leak, it may be a seal on your fuel filter (you can over tighten them and damage the seal) a cracked fuel line, my toyota had a bad valve in the lift pump and that allowed fuel to drain back to tank, fun times ahead, all you can do to start is look for leaks

Posted on Nov 28, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Pyrhyc
  • 2028 Answers

SOURCE: Duramax diesel engine

Just a thought, the pump has a check vale in it that keeps the fuel from draining back when the engine is off. If the check valve is bad, then the fuel drains back and creates an air pocket that doesn't allow it to pump the fuel, basically it create a vacuum lock in the pump so no fuel can get through it. So, you can't rule out the pump completely just because it stays running. Now I know that I'm just a computer tech here and the 6 years of shop foreman as a auto and diesel mechanic don't count, but it's a thought.

Posted on Sep 04, 2008

  • 74 Answers

SOURCE: Engine needs priming every time I want to start it.

wow could be afeul pump going bad or dirty filter injectors but im not sure i know gasoline cars

Posted on Jun 24, 2009

  • 10 Answers

SOURCE: the car starts then the primer pump sucks its self in then the engine stops

From your description you have a blockage in the fuel pipe between the fuel tank and the primer bulb.

Posted on Jul 27, 2009

abauto
  • 353 Answers

SOURCE: 1994 Chevy 4 Dr. 2500 6.5 Diesel start and stall problem

1994 Chevy Truck K 2500 Suburban 4WD V8-393 6.5L DSL

Fuel Cut Solenoid: Testing and Inspection
An inoperative shutdown solenoid can cause a no-start condition. Disconnect solenoid harness connector and with ignition switch in the "ON"
position momentarily touch solenoid harness connector to solenoid connector. If a "click" sound is heard, the solenoid circuit is operating
properly. If "click" is not heard, the system should be diagnosed as follows:
1. With test lamp connected to ground and the ignition switch in the "ON" position, backprobe the shutdown harness connector. If the test lamp
does not light check for open circuit form the ignition switch to the solenoid.
2. If the test lamp lights, check the ground circuit between solenoid stud and injection pump cover to see if connectors are clean and tight. If the
connections are not clean and tight repair and retest.
3. If the ground circuit is "OK", remove the injection pump cover. Connect a jumper wire between solenoid ground connector and ground. With
the ignition switch in the "ON" position, momentarily touch shutdown solenoid harness connector to shutdown solenoid terminal. If solenoid
operates, check for internal injection pump problem.
4. If the solenoid will not operate, replace the shutdown solenoid.
_____________________________________
Fuel Cut Solenoid: Service and Repair
REMOVE OR DISCONNECT:
1. Remove pump cover.
2. Terminal contact nuts.
3. Solenoid.
INSTALL OR CONNECT:
1. Solenoid in the pump cover.
- On the shutdown solenoid, make sure that the linkage is free.
- On the cold advance solenoid, make sure that the plunger is centered so that it will contact the check ball in the fitting.
2. Insulating washers on the terminal studs.
3. Terminal nuts and tighten to 1 Nm (9 in lbs).
4. Pump cover.
5. Inspect solenoid operation prior to installing the pump cover. Use a 12 volt DC power source.

fcd8cd6.jpg

Posted on Sep 10, 2009

  • 22 Answers

SOURCE: I have a 2001 f250

Sounds like you may have a high pressure oil leak, if you check the oil resevoir level before you start the truck you may find it low or empty. Its located at the front of the engine in front of the fuel filter housing, there should be a threaded plug you can remove to look in, if its empty or looks low, fill it up with the proper oil and put the plug back and try it then, if its ok now, you likely have an oil leak, typically failed o-rings on one or more injectors. You can buy injector o-ring kits but its a fairly involved job, I am a Ford Diesel tech and it usually takes me about 3 hours to replace all the o-rings on all 8 injectors, first time for someone who's never done it will probly be closer to 5 or 6 hours.

Posted on Aug 17, 2010

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