Engine cranks but won't start (not steering lock issue)

seanjms60 · 11-21-2022, 11:13 PM

Hi All !

Vehicle info:
- 2009 370z, 6mt, A2A Supercharged. (I've just finished installing SC kit

)
- car hasn't been started since May 22
- stock ECU (never tuned)

Engine cranks, fuel pump primes, and cooling fans run but won't start.

Battery is good, fuses are in good condition, and tested its ground point (even changed it). all sensors are replaced (genuine Nissan products). Spark plugs are working fine.

First thing pops in my head was ECU so I sent the ECU to local ECUTEK tuner, and he said nothing is wrong with ECU few days ago, but today, he told me that he is analyzing its data to detect anomalies using oscilloscope etc.

Could someone please shed some lights on this

I can't think of any other parts which could cause this kind of issue.

Much appreciated !

2011 Nismo#91 · 11-22-2022, 06:46 AM

If you have fuel flow and spark the only thing I can think is bad gas? Its 6 months old but that's not really that old. Seems kinda odd, double check the injectors and plugs?

Spooler · 11-22-2022, 02:19 PM

Did you change the injectors? If so, you will need a base tune to get up and running.

seanjms60 · 11-22-2022, 05:09 PM

yeap.. its strange. Ive actually drained the gas tank and pumped new fresh gas, just in case. I will test the injectors and plugs again today

yes I also changed the injectors - ID 1050cc. Tuner will drop by today again so fingers crossed....

thanks for your help (Nismo91 & Spooler)

fryzia23 · 11-22-2022, 06:45 PM

Fuel pump might be priming but do you have correct fuel pressure at the fuel rail?

seanjms60 · 11-22-2022, 08:01 PM

@fryzia23 - thanks for hopping in !

yeap, my mate told me the same thing haha. "Priming before actually firing doesn't mean its on" -> so I checked the fuel pressure. Fuel pump checked, filter checked, pressure at the fuel rail checked. After that, I put a screw driver to see that the spark jumps across. Confirmed that all 6 plugs are working fine.

little things can remain unseen and undetected...haha I will go through again and hope my tuner gets the car going today haha.

fryzia23 · 11-22-2022, 08:53 PM

Spooler mentioned it but the OP never confirmed it. When you say “stock ecu never tuned”, does that mean the ecu was not flashed with base tune for the supercharger and larger injectors?

seanjms60 · 11-23-2022, 04:44 AM

Tuner dropped by and flashed the ecu with base tune, and still wont start. He told me that ecu is getting all the signals from sensors.

hmm.

seanjms60 · 11-24-2022, 04:59 PM

Solved !! she runs now haha

sent the ecu to another tuner, and discovered that a component in the ecu got disconnected. He opened up the ecu and soldered a component and the car starts straightaway.

Thanks!

THE BULL · 11-25-2022, 11:19 AM

Fans coming on upon key on is almost a dead give away of an internally damaged ECM.

11-21-2022, 11:13 PM	#1 (permalink)
seanjms60 Base Member Join Date: Jun 2021 Location: South Korea Posts: 9 Drives: 09 Nissan 370z PW M6 Rep Power: 4	Engine cranks but won't start (not steering lock issue) Hi All ! Vehicle info: - 2009 370z, 6mt, A2A Supercharged. (I've just finished installing SC kit ) - car hasn't been started since May 22 - stock ECU (never tuned) Engine cranks, fuel pump primes, and cooling fans run but won't start. Battery is good, fuses are in good condition, and tested its ground point (even changed it). all sensors are replaced (genuine Nissan products). Spark plugs are working fine. First thing pops in my head was ECU so I sent the ECU to local ECUTEK tuner, and he said nothing is wrong with ECU few days ago, but today, he told me that he is analyzing its data to detect anomalies using oscilloscope etc. Could someone please shed some lights on this I can't think of any other parts which could cause this kind of issue. Much appreciated ! Last edited by seanjms60; 11-22-2022 at 04:43 AM.

11-22-2022, 06:46 AM	#2 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,400 Drives: slowly Rep Power: 40569	If you have fuel flow and spark the only thing I can think is bad gas? Its 6 months old but that's not really that old. Seems kinda odd, double check the injectors and plugs? __________________ GTR TT 493Whp/431lbft, Ecutek, Southbend 6puck,Quaife, RPM RollBar 4Point, R888R, JRZ RSPro F(10R/10C) R(10R/6C) 1000f500r inlbs+150inlbs Tender, SPL everywhere.Full Specs

11-22-2022, 02:19 PM	#3 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,792 Drives: 2013 Nismo 370z Rep Power: 2684392	Did you change the injectors? If so, you will need a base tune to get up and running. SteveVQ likes this.

11-25-2022, 11:19 AM	#10 (permalink)
THE BULL Base Member Join Date: Apr 2021 Location: Florida Posts: 217 Drives: G37S Rep Power: 26848	Fans coming on upon key on is almost a dead give away of an internally damaged ECM. seanjms60 likes this.

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11-22-2022, 05:09 PM	#4 (permalink)
seanjms60 Base Member Join Date: Jun 2021 Location: South Korea Posts: 9 Drives: 09 Nissan 370z PW M6 Rep Power: 4	yeap.. its strange. Ive actually drained the gas tank and pumped new fresh gas, just in case. I will test the injectors and plugs again today yes I also changed the injectors - ID 1050cc. Tuner will drop by today again so fingers crossed.... thanks for your help (Nismo91 & Spooler)

11-22-2022, 06:45 PM	#5 (permalink)
fryzia23 Enthusiast Member Join Date: Dec 2010 Location: new jersey Posts: 452 Drives: 2011 MB 370Z NISMO Rep Power: 1245	Fuel pump might be priming but do you have correct fuel pressure at the fuel rail?

11-22-2022, 08:01 PM	#6 (permalink)
seanjms60 Base Member Join Date: Jun 2021 Location: South Korea Posts: 9 Drives: 09 Nissan 370z PW M6 Rep Power: 4	@fryzia23 - thanks for hopping in ! yeap, my mate told me the same thing haha. "Priming before actually firing doesn't mean its on" -> so I checked the fuel pressure. Fuel pump checked, filter checked, pressure at the fuel rail checked. After that, I put a screw driver to see that the spark jumps across. Confirmed that all 6 plugs are working fine. little things can remain unseen and undetected...haha I will go through again and hope my tuner gets the car going today haha.

11-22-2022, 08:53 PM	#7 (permalink)
fryzia23 Enthusiast Member Join Date: Dec 2010 Location: new jersey Posts: 452 Drives: 2011 MB 370Z NISMO Rep Power: 1245	Spooler mentioned it but the OP never confirmed it. When you say “stock ecu never tuned”, does that mean the ecu was not flashed with base tune for the supercharger and larger injectors?

11-23-2022, 04:44 AM	#8 (permalink)
seanjms60 Base Member Join Date: Jun 2021 Location: South Korea Posts: 9 Drives: 09 Nissan 370z PW M6 Rep Power: 4	Tuner dropped by and flashed the ecu with base tune, and still wont start. He told me that ecu is getting all the signals from sensors. hmm.

11-24-2022, 04:59 PM	#9 (permalink)
seanjms60 Base Member Join Date: Jun 2021 Location: South Korea Posts: 9 Drives: 09 Nissan 370z PW M6 Rep Power: 4	Solved !! she runs now haha sent the ecu to another tuner, and discovered that a component in the ecu got disconnected. He opened up the ecu and soldered a component and the car starts straightaway. Thanks!