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  #1  
Old December 5th, 2006, 12:47 PM
Michael
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Michael
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Starter and Cold Temps

This is on a diesel motor:

On a cool morning (30-40F), there is often a 1 second delay from the time the key is turned to "start" to the time the starter activates. All relays, including starter solenoid, always "click" immediately.

This morning was the coldest I have started the engine so far, 15F, and the starter would not activate at first. It finally activated after turning and holding the key to start for a few seconds.

Is there not enough power going to the solenoid? Is it the battery?
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  #2  
Old December 5th, 2006, 01:59 PM
MonLand
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Loic Fabro
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Probably a solenoid issue. I am not sure why cold/warm would make a difference unless you have a bad connection that heats up a little when you first turn the key and by warming up (bad connections tend to heat up when electricity go through them) then the connection gets better.
Check the connection on the starter it-self. They are known to get bad, specially the one that brings power to the solenoid....
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  #3  
Old December 5th, 2006, 03:58 PM
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Mike Johnstone
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Is this an NA diesel?

My 2.5NA hated the cold and would do the same thing. I found that it was more the battary getting cold that effected it though and still does. Cleaning the grounds did more for my starter but in the end replacing the starter with a 300TDI geared version solved the problem. The 2.5NA starter is just weak.
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  #4  
Old December 5th, 2006, 04:19 PM
MonLand
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Quote:
Originally Posted by whistler110
I found that it was more the battary getting cold that effected it though and still does.
Now I feel stupid.... Of course, the cold temperature would affect the battery!!!!
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  #5  
Old December 6th, 2006, 12:14 AM
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Andrew
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My 90 2.5na diesel has to redtop optimas and starts great in the winter (for a rover diesel )
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  #6  
Old December 6th, 2006, 08:30 AM
Michael
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Thanks guys.

It was about the same temp this morning. I used a new auxillary starter circuit (momentary switch with "Hot Shot" relay) this morning, and there was no delay at all. I am not counting the chickens yet, but I think the stock starter circuit, which is 9 yrs old now, is warn out, and not providing enough juice to fully power the new starter solenoid. The next week should be colder, so I will find out soon enough by switching back and forth between old and new starter circuits.
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  #7  
Old December 6th, 2006, 11:53 AM
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Ian McCormack
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I would guess it is a combination of old starter circuit requiring more current to overcome corrosion etc and the cold temp reducing the power output from the battery
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  #8  
Old December 7th, 2006, 10:13 AM
Michael
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Come to think of it, the delay is actually a good thing, as it gives more time for the glow plugs as it gets colder!
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  #9  
Old December 8th, 2006, 08:28 AM
Michael
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This moring it was about 5-10 F, starter activated with no delay using the new starter circuit! So far, so good.
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