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post #1 of 5 Old 03-31-2013, 01:47 PM Thread Starter
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hard start

So my 01 will crank and crank. Good voltage and everything but as soon as I put jumper cables on it it fires right up. I don't think its the batteries, could it be a relay or and sensor issue?

2001 F250 SD ZF6
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She aint the fastest but she runs good
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post #2 of 5 Old 03-31-2013, 02:16 PM
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It could very well be the batteries, test the voltage while somebody else cranks the truck.

If it drops below a certain voltage the IDM will just shut off the injectors. I forget what the voltage number is exactly.
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post #3 of 5 Old 03-31-2013, 02:20 PM
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If it doesn't fire off of your batteries, but fires up immediately after jumping, it's your batteries. Replace them in pairs.

2002 F250 CCSB 4x4
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post #4 of 5 Old 03-31-2013, 03:32 PM
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post #5 of 5 Old 03-31-2013, 04:53 PM
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Defantly batteries. Anything below 12.6v is a dead battery

FUELED BY HATERS
Jack'em up high.Fat chicks cant jump!

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ext cab
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