trouble starting....
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New User
Joined: Jul 2006
Posts: 11
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From: Maine
trouble starting....
Truck will not cold start. Outside temps in the 60's. When attempting to start I hear a click.click.click noise inside the cab. Engine turns over fine but doesnt fire. Plug in for 10min or so and it fires up fine. Starts fine when hot. Any suggestions?
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
The Glow plug relay is the one closest to the windshield next to the fuel filter housing.
With a volt meter set to dc volts check the two large post and battery ground 1 post at a time. With no key in the ingintion 1 post will show voltage and 1 will not. On a cold engine get someone to turn the key to On but not crank and the post that was 0 should now show voltage, if it doesn't the problem is the relay. Check that and let us know then we can go to ohming the plugs.
With a volt meter set to dc volts check the two large post and battery ground 1 post at a time. With no key in the ingintion 1 post will show voltage and 1 will not. On a cold engine get someone to turn the key to On but not crank and the post that was 0 should now show voltage, if it doesn't the problem is the relay. Check that and let us know then we can go to ohming the plugs.
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New User
Joined: Jul 2006
Posts: 11
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From: Maine
Thanks a lot, I am following what you are saying as I look in my trusty Haynes manual. I will try it and get back....
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New User
Joined: Jul 2006
Posts: 11
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From: Maine
Ok, I did what you recommended. 1 post reads abt 12V with key off, other post reads 0. With key on, post that read 0 now reads approx 12v. The hot post with key off gets very hot to touch with key on.....
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Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
Your relay is working. Now to ohm the plugs you need to get to the harness connector on the inboard side of the valve cover and disconnect it. Lay a piece of cardboard across the engine to make it a little more comfortable. check the pins on the valve cover connector and not the harness
Pinout
G G I I C I I G G
G=Glow Plug
I=Injector +
C=Injector Common
Glow Plugs - Ohm between "G" and battery ground the reading should be between 0.1 and 2.0 ohms anything else is a bad plug
While your there check the injector harness
Ohm between "I" and "C" should be less than 5.0 ohms
Next on the end of the harness connector check continuity between the Glow Plug pins and the large post that showed 0 and then 12 with key on. if it is not a complete circuit the fusible links may have blown. They are inside the harness where the large wire comming off the post splices into 4 to connect tto the harness connector.
Pinout
G G I I C I I G G
G=Glow Plug
I=Injector +
C=Injector Common
Glow Plugs - Ohm between "G" and battery ground the reading should be between 0.1 and 2.0 ohms anything else is a bad plug
While your there check the injector harness
Ohm between "I" and "C" should be less than 5.0 ohms
Next on the end of the harness connector check continuity between the Glow Plug pins and the large post that showed 0 and then 12 with key on. if it is not a complete circuit the fusible links may have blown. They are inside the harness where the large wire comming off the post splices into 4 to connect tto the harness connector.
Lead Driver
Joined: Jun 2004
Posts: 6,303
Likes: 576
From: Amarillo, TEXAS!
If you mean you're hearing the clicking when you first start to crank it over, I had the same symptoms a while back. Load test the batteries. Turned out I had a bad battery; new one fixed the problem immediately.
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