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Old 04-05-2013, 08:49 PM
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Slow start...

It's been in the low 50's lately and I've been having trouble with the initial start of my truck everyday. I can't tell if the batteries are going bad. Or if the starter is going out. Or if maybe the glow plugs aren't heating the block enough for starting. Anyone have any ideas or thoughts? 03' 7.3 104k miles cc lb 4x4


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Old 04-06-2013, 07:25 AM
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batteries, glow plugs, starter or to thick of oil
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Old 04-06-2013, 09:54 AM
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Any smoke? Does it seem to crank slower than it used it?
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Old 04-06-2013, 06:54 PM
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Way slower and the oil is 15w30 same oil I have always used.


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Old 04-06-2013, 08:55 PM
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Is it just the first start of the day, or every time?

If it's just the first time, you might have something staying on overnight.



Check all the cable connections. Make sure they are clean and not loose.

Have both batteries load tested individually.


If all that checks out, and it's every time, pull the starter and get it tested.
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Old 04-06-2013, 10:51 PM
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only when its cool... such as the first start of the day or after it sits for a few hours... im gonna plug the block heater in and see if that helps.... but if it does will that mean it is the glow plugs?
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Old 04-06-2013, 11:31 PM
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You probably have a battery going bad. They will play jedi mind tricks either u. Take it a parts store and gave them lead test them, make sure u disconnect them and isolate them when they do it. Then replace both

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Old 05-06-2013, 04:20 AM
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So i replaced them with interstates batteries the megatrons. and it seemed to help but now i have a different problem. still slow to start on the first start of the day but now it puts a small blueish cloud of smoke on that initial start. I have read that this is burning oil and im going to run seafoam through my oil and do an oil change to see if maybe an injector is stuck open. also my mileage dropped by almost half.... and seems to blow black smoke like a dodge when i barely goose the throttle and its on the same economy tune I always keep it on. also I just changed my boots so that is the issue... anyone have any ideas???
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Old 05-07-2013, 09:41 PM
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I would advise against adding Seafoam to your oil. If you're burning a little oil, there may be enough oil in the cylinders after sitting to cause enough resistance (similar to a hydro-locking effect) to give the initial start you're describing.
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Old 05-08-2013, 12:39 AM
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Why is seafoam a bad idea in the oil? it says on the bottle that it is okay to put in the oil?
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