Will not start
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Junior User
Joined: Sep 2006
Posts: 64
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Will not start
86/6.9 (235,000mi) running perfectly fine, came home and parked in the yard Friday night, jumped in next morning and will not start. Starter turns motor over like normal, cranks and cranks but will not fire (fired up once and ran about 3-5 secs).
Took the fuel filter off to check and it was half full of fuel. I filled it to the top and tried again, still will not fire up.
New glow plugs 3 weeks ago, new injectors and pump 70,000mi ago.
This truck has run great for years and has been extremely reliable -- this is the first time I've had a problem.
Any ideas??
Took the fuel filter off to check and it was half full of fuel. I filled it to the top and tried again, still will not fire up.
New glow plugs 3 weeks ago, new injectors and pump 70,000mi ago.
This truck has run great for years and has been extremely reliable -- this is the first time I've had a problem.
Any ideas??
Senior User
Joined: Feb 2004
Posts: 152
Likes: 0
From: Halstead, KS
If the fuel filter was only half full of fuel, that is an indication that the fuel lift pump may be dead. It is located on the front passenger side of the engine, directly below the vacuum pump. this pump transfers fuel from the tank(s), through the fuel filter, and on into the injector pump. If it dies, then your truck will not run at all.
Senior User
Joined: Apr 2003
Posts: 209
Likes: 0
might be your lift pump
take the line off that comes from the mecanical pump crank it over and see if you get fuel coming out it should sguirt out pretty good
or you might have a cracked pickup tube in the fuel tank
if you have dueal tanks try the other one
take the line off that comes from the mecanical pump crank it over and see if you get fuel coming out it should sguirt out pretty good
or you might have a cracked pickup tube in the fuel tank
if you have dueal tanks try the other one
Senior User
Joined: Apr 2006
Posts: 478
Likes: 0
From: houma, louisiana
yes there is disconect the wires from the ip, remove the valve core from the schrader valve and atach a fuel pressure guage. crank the motor over to obtain fuel pressure and record reading, a good lift pump should read 5 to 7 psi at cranking speeds. if it doesnt replace pump. remember dont crank for more than 20secs at a time or you could burn up starter, and let cool for 3 minutes before continuing.
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