Sr20det Warm Start issue. Cranks up fine when cold. Not when warm Help please - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

BNASTYs13 · 04-26-2013, 03:40 PM

Well My SR just started having this weird problem. It has always cranked up fine when its cold. Always runs great. Never hesitates. I will drive it for about 15 minutes and go in and eat somewhere then come out and it wont start. If i let it sit it will start. Its almost like its flooded. I have replaced the CTS and it still does it. I have Reset the ECU ( J4 ) and it still does it. It is just a bolt ons SR with a Z32 maf and safc2. Anyone else have the problem? I would pull codes but the damn J4 ecu doesnt have the screw that turns.

anyone else have the warm start problem and successfully solved it?

I have tried searching and have yet to find one that found the problem. I would swap in a buddies ecu and try that but none of them have 96-98 ecus. damn type x motor.

JN1AS4 · 04-27-2013, 08:39 AM

Did you replace the 2 wire CTS or the 1 wire CTS? Because SR has 2 CTS. 1 has 1 wire and thats for the temp gauge. The other has 2 wires which is for the ECU. The one that you need to replace is the 2 wire CTS that goes to the ecu. If you already replaces the correct CTS I would recommend you to use an OEM CTS. Because a lot of times the part store CTS are no good from the beginning. But it definitely sounds like you have a CTS issue. And it's still very possible to pull ecu codes with that screw missing. You would just have to use a real fine Phillips head screw driver to do so. Hopefully I was able to help out. Good luck.

04-26-2013, 03:40 PM	#1
BNASTYs13 Zilvia Addict Join Date: Jul 2011 Location: NC Age: 37 Posts: 685 Trader Rating: (50) Feedback Score: 50 reviews	Sr20det Warm Start issue. Cranks up fine when cold. Not when warm Help please Well My SR just started having this weird problem. It has always cranked up fine when its cold. Always runs great. Never hesitates. I will drive it for about 15 minutes and go in and eat somewhere then come out and it wont start. If i let it sit it will start. Its almost like its flooded. I have replaced the CTS and it still does it. I have Reset the ECU ( J4 ) and it still does it. It is just a bolt ons SR with a Z32 maf and safc2. Anyone else have the problem? I would pull codes but the damn J4 ecu doesnt have the screw that turns. anyone else have the warm start problem and successfully solved it? I have tried searching and have yet to find one that found the problem. I would swap in a buddies ecu and try that but none of them have 96-98 ecus. damn type x motor.

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04-27-2013, 08:39 AM	#2
JN1AS4 Zilvia Member Join Date: Dec 2009 Location: GA Posts: 291 Trader Rating: (1) Feedback Score: 1 reviews	Did you replace the 2 wire CTS or the 1 wire CTS? Because SR has 2 CTS. 1 has 1 wire and thats for the temp gauge. The other has 2 wires which is for the ECU. The one that you need to replace is the 2 wire CTS that goes to the ecu. If you already replaces the correct CTS I would recommend you to use an OEM CTS. Because a lot of times the part store CTS are no good from the beginning. But it definitely sounds like you have a CTS issue. And it's still very possible to pull ecu codes with that screw missing. You would just have to use a real fine Phillips head screw driver to do so. Hopefully I was able to help out. Good luck.