Long cranking after truck sits for a while

Tiny
DOUGANDLAURA44
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Oh, okay whew. Thought I was going to have to buy new ones, lol.
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Thursday, December 3rd, 2020 AT 4:46 AM
Tiny
DOUGANDLAURA44
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So I pulled the coils out completely and tested the secondary’s which came out in the 12’s.
When I tested the primary’s where the connectors plug in. I put the multimeter to the constant and then checked the other three prongs. I was getting 56.4 k ohms. I was reading that it should have only been somewhere around 6.
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Thursday, December 3rd, 2020 AT 9:45 AM
Tiny
DOUGANDLAURA44
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Replaced both coils. It runs better. But it still was a hard start condition. Once it warmed up it ran like a champ. An hour and a half later I came out to start it and it seemed like it had some missed and low idle as it started up. But after I revved it for a second it ran okay.
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Thursday, December 3rd, 2020 AT 5:44 PM
Tiny
DOUGANDLAURA44
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Okay Mr. Joe,

You are the man, so I don’t have an OBD2 or 1 port that is wired up properly so I couldn’t do any data reads. But you were 100% right. It was the coolant temperature sensor. It had a severed wire going to the plug. Truck is fixed and with all the nice new pretty parts it runs like a champ. Thank you for all your time.
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Friday, December 4th, 2020 AT 5:06 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

I'm glad you found it. You would be surprised how often that sensor causes trouble on all types of vehicles.

Regardless, I'm glad it's fixed. Take care of yourself. Also, please feel free to come back any time in the future. You are always welcome here.

Joe
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Friday, December 4th, 2020 AT 8:31 PM

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