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hard start when cold/ starts right up when hot

486 views 4 replies 2 participants last post by  harry verrill 
#1 ·
code 0670/ replaced glow plugs,harness,and gpcm no change. Truck is 07 6.0 stock no mods. any thoughts. thanks in advance
 
#2 ·
#4 ·
By "looking," I meant checking with a multimeter to ensure that the voltages are being provided to the module as expected and to ensure that there are no shorts to ground. You may mean that, too, though.

Beyond that, I am also assuming that you have cleared the code and it is returning. If you haven't cleared it, you will want to do that.

If it weren't for the code, I would be wondering about your FICM voltage. Just mentioning.
 
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