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Are my heater grids cycling normally?

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Old 01-04-2005, 12:40 AM
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Are my heater grids cycling normally?
I know how and when and why my grids cycle but I did notice the other day that if I ramp up to around 1200 RPM and hold it there the grids will come on and stay on for as long as I hold that RPM. Is this normal? I could see where this would be good if I had a high idle set up.
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Old 01-04-2005, 07:33 AM
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That's normal for the grid heater to come on and stay on if you ramp up the idle. Mine does the same thing... I pretty sure it becuase of the increased air flow is cooler and the ECM kicks the heat back on because of the lower air temp (below 68*F)

I hope this helps...
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Old 01-04-2005, 07:46 AM
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yup its normal
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Old 01-04-2005, 08:46 AM
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Yup, mine does it too if the charge air temp is cold enough and the truck is not moving.
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Old 01-04-2005, 06:34 PM
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Oh yeah anything over 25 MPH will cancel all grid heat times...

I forgot about that too...
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Old 01-04-2005, 08:36 PM
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sounds right, what he said and perfectly normal
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Old 01-05-2005, 09:40 PM
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Thanks for the info.
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