Thread: Installed New Transmission Now Won't Idle in Park or Neutral. P0171 and P0306 Codes

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#4 Re: Installed New Transmission Now Won't Idle in Park or Neutral. P0171 and P0306 Cod
wowitsfast

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04-29-2021

I would agree with Fordman77. Sounds like a vacuum leak.

Can rent a smoke tester for easy diagnosis

Sent from my SM-G981V using Tapatalk

Just a bunch of junk thrown together http://www.grandprixforums.com/membe...ht=wowitsfasts

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idle, installed, pulled, start, vacuum

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