Sr will not start if it's warm - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Este510 · 07-15-2009, 04:32 PM

My car will not start after it's warmed up, or even if it's over 90 degrees outside, but if I disconnect the coolant temp sensor it starts right up.

I've already changed both coolant sensors, wiring harness, spark plugs and the thermastat, what else could it be. I am running a power fc, upgraded turbo, injectors, and z32 maf for the last 3 years now. Any help would be helpful.

tunersedge · 07-15-2009, 04:37 PM

Quote:

Originally Posted by Este510

My car will not start after it's warmed up, or even if it's over 90 degrees outside, but if I disconnect the coolant temp sensor it starts right up.

I've already changed both coolant sensors, wiring harness, spark plugs and the thermastat, what else could it be. I am running a power fc, upgraded turbo, injectors, and z32 maf for the last 3 years now. Any help would be helpful.

I had this exact same problem for a while. I replaced both coolant sensors and it fixed it. What sr are you running? I first replaced my coolant sensor with one from a sentra se-r. I got the sensor from autozone and that didnt fix it. I purchased the one that frsport has on their site and it fixed it.

*ManoNegra* · 07-15-2009, 06:16 PM

Similar thing happened to me once
turned out I left the Temp sensor not fully plugged
after doing some work in the engine bay

Este510 · 07-16-2009, 01:49 AM

It's a red top, I bought the sensors from superior nissan.

ross.cottrill · 07-16-2009, 05:02 AM

im pretty sure roidmonkey had the same problem,might wanna shoot him a pm..

*fliprayzin240sx* · 07-16-2009, 08:37 AM

ECU water temp sensor...is the 2 wire sensor. Either the ECU is getting a bad reading and making it think your engine is still cold or your PFC correction settings are off.

Este510 · 07-18-2009, 02:05 AM

Figured it out, PFC had the wrong readings, Thanks for all the info.

07-15-2009, 04:32 PM	#1
Este510 Zilvia Member Join Date: Aug 2006 Location: Cali Age: 43 Posts: 214 Trader Rating: (2) Feedback Score: 2 reviews	Sr will not start if it's warm My car will not start after it's warmed up, or even if it's over 90 degrees outside, but if I disconnect the coolant temp sensor it starts right up. I've already changed both coolant sensors, wiring harness, spark plugs and the thermastat, what else could it be. I am running a power fc, upgraded turbo, injectors, and z32 maf for the last 3 years now. Any help would be helpful.

07-16-2009, 05:02 AM	#5
ross.cottrill Zilvia FREAK! Join Date: Sep 2005 Location: orlando,fl Posts: 1,185 Trader Rating: (12) Feedback Score: 12 reviews	im pretty sure roidmonkey had the same problem,might wanna shoot him a pm.. __________________ " NEO VVL BABY FTMFW!" Originally Posted by shagspeed Dude if I made 500WHP on a 54C SR20DET back in 1999-2000 with old school technology .. This VET will T-BAG your RB engines

07-16-2009, 08:37 AM	#6
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	ECU water temp sensor...is the 2 wire sensor. Either the ECU is getting a bad reading and making it think your engine is still cold or your PFC correction settings are off. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

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07-15-2009, 06:16 PM	#3
ManoNegra Guild of Skullduggerous Intent Join Date: Jan 2004 Location: Socal Posts: 7,841 Trader Rating: (48) Feedback Score: 48 reviews	Similar thing happened to me once turned out I left the Temp sensor not fully plugged after doing some work in the engine bay

07-16-2009, 01:49 AM	#4
Este510 Zilvia Member Join Date: Aug 2006 Location: Cali Age: 43 Posts: 214 Trader Rating: (2) Feedback Score: 2 reviews	It's a red top, I bought the sensors from superior nissan.

07-18-2009, 02:05 AM	#7
Este510 Zilvia Member Join Date: Aug 2006 Location: Cali Age: 43 Posts: 214 Trader Rating: (2) Feedback Score: 2 reviews	Figured it out, PFC had the wrong readings, Thanks for all the info.