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Start issues


Powersc17

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My 2014 GMC Sierra has about 1000 miles on it when it sits over night and is cold it takes a lot to start it instead of the normal quick start any ideas on what could cause this?

Is it the same if you leave it in the 'on' position and let the computer start up before turning it to start vs immediately turning to the 'start' position?

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Hello timstruck,
I see you have concerns about how your truck may take longer to start when running on E85 compared to regular. I’m glad some members on the forum have given their advice. Although I’m not technically trained, I can reach out to your dealership if you decide to take it in. Just send a private message if I can be of any assistance.
Sincerely,
Eddie A.
GM Customer Care
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Guys, our new gen 3 ecotech are running a high pressure injection system that requires normal 30-50 psi fuel pressure to jump to 15-20,000 psi to run the direct injection. I notice this on my 2014 and know that you can have some normal bleed down through this system.

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  • 2 weeks later...

I found some information in an ACDelco Techconnect issue regarding the cranking times for the DI motors. I attached the article as a picture. Here is the issue where I got this information: http://acdelcotechconnect.com/pdf/newsletters-press-releases/acdelco/2014/ACDelco-TechConnect-May-June-2014-Newsletter.pdf

post-124685-0-82294200-1412806896_thumb.jpg

post-124685-0-82294200-1412806896_thumb.jpg

post-124685-0-82294200-1412806896_thumb.jpg

post-124685-0-82294200-1412806896_thumb.jpg

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I just run 87 octane and don't have any issues and starts right up. There's been a handful of times where it took an extra second so not too worried. Been starting fine ever since I bought it and it just hit 7,000 yesterday.

 

About the ones mentioning E85. It makes sense that E85 would be a little harder to start since it requires more of it to burn normal, which is why mileage is worse but seems to give a little more power.

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