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Old 12-13-2023, 12:59 PM   #1
240Zfunahollic
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s14 Cold start issue. S14 silvia sr20det

Can anyone give me a place to start with my cold start issue? Bone stock s14 silvia with an auto trans. Thinking vacuum leak and/ or coolant temp sensor. It vibrates at idle as well. https://youtube.com/shorts/VB21PWZUK...jWzQ5Orlq5P_xe
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Old 12-13-2023, 05:59 PM   #2
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watched the video, whats the issue? it starts fine
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Old 12-13-2023, 11:27 PM   #3
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It really stumbles to start. Almost dies out then picks up to cold idle. Watch again with good volume.
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Old 02-10-2024, 03:35 AM   #4
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Quote:
Originally Posted by 240Zfunahollic View Post
It really stumbles to start. Almost dies out then picks up to cold idle. Watch again with good volume.
start by pulling the idle valve off and cleaning it. I'm sure the injectors have never been cleaned (do that if available local if not run a can of "cleaner" through them).
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Old 02-10-2024, 10:02 PM   #5
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Thanks for the input. After doing some digging I found a vacuum line and the factory diverter valve weren't fully connected into the intake. It's better but not 100%. But my fuel pump died last week and I suspect weak pressure didn't help. Replacing the pump when it comes in and will cleaning the IACV and looking for more vacuum leaks.
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Old 02-21-2024, 11:10 AM   #6
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New fuel pump solved the issue.
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