sr wont start when hot - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sbanzer123 · 04-20-2008, 12:54 PM

i have a s14 sr20 in my s14 mods include gt8271r, tomei 740cc inj, z32 mafs, apexi hg,jim wolf ecu tune, jim wolf s3 cams and a few other irrelavent things. now my problem is that my car will not start when it is hot, if i go drive the car for a bit and shut it off it will not start again until i let the car cool down for a hour or so.when i try to crank the car over when it is hot it smells like it is flooded. when this happens the car will bump start with no problem, also after it floods i can unplug 2 of my injectors and the car will start. i have set the timing to 15* btdc, checked all my connections, and i just had my starter rebuilt. im thinking that it has something to do with ignition, maybe one of my coilpacks are weak or possibly my ignitor could be bad also. any ideas or suggestions are greatly appreciated.

sbanzer123 · 04-20-2008, 06:49 PM

anybody? i also checked my injector o rings and they were fine.

Z33dori · 04-20-2008, 06:53 PM

it might be your coolant temp sensor.

this happened to one of our friends SRs. We had to pull the injectors out and plug them in while he would crank it.

makulit054 · 04-20-2008, 09:21 PM

when you car is warm, try starting your car with the ECT (engine coolant temp) sensor. If it starts then you have the culprit why your car won't start when it's warmed up. The ECT is for hot and cold starts. Hope this helps. I've had this same problem.

nicku · 04-20-2008, 09:30 PM

yea...it happened to me too, except mine was the ECT wire in the wiring harness was broken

sbanzer123 · 04-21-2008, 03:56 AM

ok ya i will try that.

Tearlessj · 04-21-2008, 04:02 AM

my KA did the same thing. Started fine when cold,warmed it up and it wouldnt fire again. Just kept cranking and cranking. Had someone put some pressure on the coolant temp sensor clip, started on the first try.

Oo_Skyline_oO · 04-21-2008, 04:34 AM

thats wack man, my rb starts without it just fine, good luck on it bro, I was actually thinking that the problem might be with one of the injectors,kk or fuel system. check your fuel pressure, maybe if its too high it lets some gas in through the injectors and floods your engine, just a theory tho, like I said good luck.

sbanzer123 · 04-21-2008, 02:14 PM

does anybody know for sure what cooland temp sensor works for the s14 sr20, ive only found the info for the s13 motors. another thing i found that was odd was when i went to set my timing i unplugged my tps and the check engine light didnt come on. does this happen for anybody else?

GSXRJJordan · 04-21-2008, 02:38 PM

Yeah, your check engine light probably isnt wired up. You can still check for codes on the ECU itself.

I'm almost positive coolant temp sensors are the same across all SR20s. Have you already disconnected it and tried to start it to see if that's the problem?

sbanzer123 · 04-21-2008, 02:41 PM

my check engine light has been on before though. i had a missfire and it would come on when it was missing. and i havent had a chance to check my cts

cowboy240 · 04-21-2008, 04:14 PM

my car (ka) has been doing the same thing but when i took the car for a spin it heated up to an abnormal temperature ima go home and disconnect that sensor and see if it will start up hot if not i dont know whats wrong with mine

makulit054 · 04-21-2008, 04:19 PM

what do you mean abnormal temperature? If it overheated I think you have more just than one problem. The ECT sensor is different from the temp sensor that sends a the signal to your temp gauge on your dash.

cowboy240 · 04-21-2008, 05:03 PM

it went up to the line before the top line

cowboy240 · 04-21-2008, 05:55 PM

problem fixed. it was only one of the two sensors (it was loose) haha.

Sil-Eighty SE-K · 04-25-2008, 05:50 PM

coolant temp sensor ( the big one that goes to the ecu)

drkidd22 · 04-25-2008, 08:33 PM

Quote:

Originally Posted by cowboy240

my car (ka) has been doing the same thing but when i took the car for a spin it heated up to an abnormal temperature ima go home and disconnect that sensor and see if it will start up hot if not i dont know whats wrong with mine

That's a problem I had with my 2000 Altima. My temp gauge would rise up all the way for a few seconds and then come back down. At first I though it was electronic or the sensor but it ended up being my thermostat. I didn't know this till I blew my head gasket and found the thermostat to be locked, not letting the water flow.

sbanzer123 · 04-26-2008, 11:51 AM

well the cts fixed my problem! another problem solved by the awsome zilvia community. thanks guys. now i just gotta go retime it because the car was idleing at like 1100 because the cts wasnt giving the ecu the signal to drop back the idle. so i think my timings way off.

04-20-2008, 12:54 PM	#1
sbanzer123 Zilvia Junkie Join Date: Aug 2006 Location: Buffalo, NY Age: 36 Posts: 534 Trader Rating: (6) Feedback Score: 6 reviews	sr wont start when hot i have a s14 sr20 in my s14 mods include gt8271r, tomei 740cc inj, z32 mafs, apexi hg,jim wolf ecu tune, jim wolf s3 cams and a few other irrelavent things. now my problem is that my car will not start when it is hot, if i go drive the car for a bit and shut it off it will not start again until i let the car cool down for a hour or so.when i try to crank the car over when it is hot it smells like it is flooded. when this happens the car will bump start with no problem, also after it floods i can unplug 2 of my injectors and the car will start. i have set the timing to 15* btdc, checked all my connections, and i just had my starter rebuilt. im thinking that it has something to do with ignition, maybe one of my coilpacks are weak or possibly my ignitor could be bad also. any ideas or suggestions are greatly appreciated.

04-20-2008, 06:53 PM	#3
Z33dori Post Whore! Join Date: Dec 2006 Location: Riverview, FL Age: 36 Posts: 5,557 Trader Rating: (12) Feedback Score: 12 reviews	it might be your coolant temp sensor. this happened to one of our friends SRs. We had to pull the injectors out and plug them in while he would crank it. __________________

04-21-2008, 04:02 AM	#7
Tearlessj Nissanaholic! Join Date: Feb 2007 Location: Memphis Age: 33 Posts: 1,907 Trader Rating: (6) Feedback Score: 6 reviews	my KA did the same thing. Started fine when cold,warmed it up and it wouldnt fire again. Just kept cranking and cranking. Had someone put some pressure on the coolant temp sensor clip, started on the first try. __________________ Nagasaki Motors Friends help you move. Real friends help you move bodies.

04-21-2008, 02:38 PM	#10
GSXRJJordan Post Whore! Join Date: May 2006 Location: San Diego, CA Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	Yeah, your check engine light probably isnt wired up. You can still check for codes on the ECU itself. I'm almost positive coolant temp sensors are the same across all SR20s. Have you already disconnected it and tried to start it to see if that's the problem? __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

04-20-2008, 06:49 PM	#2
sbanzer123 Zilvia Junkie Join Date: Aug 2006 Location: Buffalo, NY Age: 36 Posts: 534 Trader Rating: (6) Feedback Score: 6 reviews	anybody? i also checked my injector o rings and they were fine.

04-20-2008, 09:21 PM	#4
makulit054 Zilvia Member Join Date: May 2007 Location: socal Posts: 215 Trader Rating: (1) Feedback Score: 1 reviews	when you car is warm, try starting your car with the ECT (engine coolant temp) sensor. If it starts then you have the culprit why your car won't start when it's warmed up. The ECT is for hot and cold starts. Hope this helps. I've had this same problem.

04-20-2008, 09:30 PM	#5
nicku Zilvia Junkie Join Date: Aug 2007 Location: St. Cloud, MN Age: 40 Posts: 545 Trader Rating: (0) Feedback Score: 0 reviews	yea...it happened to me too, except mine was the ECT wire in the wiring harness was broken

04-21-2008, 03:56 AM	#6
sbanzer123 Zilvia Junkie Join Date: Aug 2006 Location: Buffalo, NY Age: 36 Posts: 534 Trader Rating: (6) Feedback Score: 6 reviews	ok ya i will try that.

04-21-2008, 04:34 AM	#8
Oo_Skyline_oO BANNED Join Date: Feb 2008 Location: Santa Ana, CA Posts: 639 Trader Rating: (6) Feedback Score: 6 reviews	thats wack man, my rb starts without it just fine, good luck on it bro, I was actually thinking that the problem might be with one of the injectors,kk or fuel system. check your fuel pressure, maybe if its too high it lets some gas in through the injectors and floods your engine, just a theory tho, like I said good luck.

04-21-2008, 02:14 PM	#9
sbanzer123 Zilvia Junkie Join Date: Aug 2006 Location: Buffalo, NY Age: 36 Posts: 534 Trader Rating: (6) Feedback Score: 6 reviews	does anybody know for sure what cooland temp sensor works for the s14 sr20, ive only found the info for the s13 motors. another thing i found that was odd was when i went to set my timing i unplugged my tps and the check engine light didnt come on. does this happen for anybody else?

04-21-2008, 02:41 PM	#11
sbanzer123 Zilvia Junkie Join Date: Aug 2006 Location: Buffalo, NY Age: 36 Posts: 534 Trader Rating: (6) Feedback Score: 6 reviews	my check engine light has been on before though. i had a missfire and it would come on when it was missing. and i havent had a chance to check my cts

04-21-2008, 04:14 PM	#12
cowboy240 Join Date: Feb 2008 Location: fayettevlle, ar Age: 41 Posts: 21 Trader Rating: (0) Feedback Score: 0 reviews	my car (ka) has been doing the same thing but when i took the car for a spin it heated up to an abnormal temperature ima go home and disconnect that sensor and see if it will start up hot if not i dont know whats wrong with mine

04-21-2008, 04:19 PM	#13
makulit054 Zilvia Member Join Date: May 2007 Location: socal Posts: 215 Trader Rating: (1) Feedback Score: 1 reviews	what do you mean abnormal temperature? If it overheated I think you have more just than one problem. The ECT sensor is different from the temp sensor that sends a the signal to your temp gauge on your dash.

04-21-2008, 05:03 PM	#14
cowboy240 Join Date: Feb 2008 Location: fayettevlle, ar Age: 41 Posts: 21 Trader Rating: (0) Feedback Score: 0 reviews	it went up to the line before the top line

04-21-2008, 05:55 PM	#15
cowboy240 Join Date: Feb 2008 Location: fayettevlle, ar Age: 41 Posts: 21 Trader Rating: (0) Feedback Score: 0 reviews	problem fixed. it was only one of the two sensors (it was loose) haha.

04-26-2008, 11:51 AM	#18
sbanzer123 Zilvia Junkie Join Date: Aug 2006 Location: Buffalo, NY Age: 36 Posts: 534 Trader Rating: (6) Feedback Score: 6 reviews	well the cts fixed my problem! another problem solved by the awsome zilvia community. thanks guys. now i just gotta go retime it because the car was idleing at like 1100 because the cts wasnt giving the ecu the signal to drop back the idle. so i think my timings way off.