LMM: Cold start oddity

N2BRK

Well-known member
Dec 31, 2009
2,054
371
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I thought that I was loosing my mind, but here's what's going on...

In the cold, my truck starts with no problem with the factory auto start. But if I use the key to start it, it starts like shit! With the auto start it turns over quickly and cranks right up. On key it turns over and then all but stops turning over and then catches and starts like it's down a couple cylinders, puffs a bunch, and then will clean up and run. It's to where I only use the auto start now.

WTF?

Any ideas on what's going on?

Thanks in advance!
Wally