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Originally Posted by wizardket
Well, I decided to set the Super Chip programmer back to stock. When I tried to crank it, it had a hard crank so I made sure it was fully charged with a jump (heavy duty cables) and it started right up. When it set back to stock and clears the DTC's, I could hear something like a pump running for about 5 seconds. I hear something similar on normal start but only for about a half second. I set the programing to Tow Safe and it starts fine.
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the pump running was probably just the electric vacume pump. if it only sits for short times (less than a day) they dont lose too much vacume out of the system, but since yours sat for a while, it just had to build more vacume for the system. no biggie, normal. as far as your issue, sounds to me like it may be weak batteries just starting to go, but thats just off of what you have told me, its tough to diag online.