Cold start issue. S14 silvia sr20det - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

240Zfunahollic · 12-13-2023, 11:59 AM

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

inopsey · 12-13-2023, 04:59 PM

watched the video, whats the issue? it starts fine

240Zfunahollic · 12-13-2023, 10:27 PM

It really stumbles to start. Almost dies out then picks up to cold idle. Watch again with good volume.

tunermt · 02-10-2024, 02:35 AM

Quote:

Originally Posted by 240Zfunahollic

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).

240Zfunahollic · 02-10-2024, 09:02 PM

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.

240Zfunahollic · 02-21-2024, 10:10 AM

New fuel pump solved the issue.

12-13-2023, 11:59 AM	#1
240Zfunahollic Zilvia Addict Join Date: Aug 2003 Location: South Carolina Age: 38 Posts: 621 Trader Rating: (35) Feedback Score: 35 reviews	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 __________________ Visit My Trader rating page http://zilvia.net/f/traderratings.html?u=15347

12-13-2023, 10:27 PM	#3
240Zfunahollic Zilvia Addict Join Date: Aug 2003 Location: South Carolina Age: 38 Posts: 621 Trader Rating: (35) Feedback Score: 35 reviews	It really stumbles to start. Almost dies out then picks up to cold idle. Watch again with good volume. __________________ Visit My Trader rating page http://zilvia.net/f/traderratings.html?u=15347

02-10-2024, 09:02 PM	#5
240Zfunahollic Zilvia Addict Join Date: Aug 2003 Location: South Carolina Age: 38 Posts: 621 Trader Rating: (35) Feedback Score: 35 reviews	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. __________________ Visit My Trader rating page http://zilvia.net/f/traderratings.html?u=15347

02-21-2024, 10:10 AM	#6
240Zfunahollic Zilvia Addict Join Date: Aug 2003 Location: South Carolina Age: 38 Posts: 621 Trader Rating: (35) Feedback Score: 35 reviews	New fuel pump solved the issue. __________________ Visit My Trader rating page http://zilvia.net/f/traderratings.html?u=15347

12-13-2023, 04:59 PM	#2
inopsey Nissanaholic! Join Date: Jul 2008 Location: canada Posts: 1,707 Trader Rating: (21) Feedback Score: 21 reviews	watched the video, whats the issue? it starts fine