KA-T with LS2 coils, no power to ecu/fuel pump? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

tuzzio · 10-29-2015, 06:56 PM

Okay guys. Just finished up wiring my ls2 coils. Went to plug in my laptop to change the settings in my aem and it won't connect or notice the usb cable, and my fuel pump doesn't prime, it did before this and the laptop has been plugged into the car numerous times. I used the diagram from aem's website. Its an s13 ka. http://aemelectronics.com/files/inst...Play%20EMS.pdf

Coil triggers:

Coil 1: #1
Coil 2 is #7
Coil 3 is #5
Coil 4: is #25
I used #21 for the ecu ground (sensor ground)
One ground running to the head
And the power is pin #36 which was previously running to a relay for the Hotwire mod
So what gives? What did I miss?

unpaintedhatch · 10-29-2015, 10:23 PM

Have you tried to restart you're laptop and AEM unit?
Try the easy stuff first.

Yellow4g63 · 10-29-2015, 10:36 PM

break out the volt meter and start double checking your grounds and power.

godrifttoday · 10-29-2015, 10:39 PM

Hey question for you, did you just splice into the harness or did run a wire direct to the pins? If so where can I get the ecu pins so I can crimp my wire to it?

tuzzio · 10-30-2015, 03:29 PM

I spliced into the harness about 3" away from the ecu connector.

Bump, still trying to figure this out.

giaolike · 10-30-2015, 07:25 PM

break out the volt meter and start double checking your grounds and power.

unpaintedhatch · 10-30-2015, 09:27 PM

Do you hear the relay on the AEM harness "click" when you give power to your ignition switch?

Frank_Jaeger · 10-30-2015, 09:35 PM

You forgot to plug in your coils and left the stock KA spark plugs in instead.

tuzzio · 10-31-2015, 09:22 AM

Just did some digging.

Pin #36 needs to be connected for whatever reason, snipped and twisted them together, and now the fuel pump primes. Going to plug my laptop in and see what happens. If it has power, i'll take my power source for the coils from elsewhere.

tuzzio · 10-31-2015, 09:57 PM

Anyways, Seems like for whatever reason, pin 36 needs to stay connected to factory settings.

Used pin 28 for power and changed it in the standalone to 12v switched. Now the problem i'm running into is that I have no spark. I have power to the coils, but doesn't seem like its getting signal while cranking.

unpaintedhatch · 11-01-2015, 11:09 AM

Do the injectors fire when you spin the distributor?

10-29-2015, 10:39 PM	#4
godrifttoday Post Whore! Join Date: Jan 2004 Location: los angeles Age: 37 Posts: 3,120 Trader Rating: (82) Feedback Score: 82 reviews	Hey question for you, did you just splice into the harness or did run a wire direct to the pins? If so where can I get the ecu pins so I can crimp my wire to it? __________________ NEED Bolt kits for your car?

11-01-2015, 11:09 AM	#11
unpaintedhatch Leaky Injector Join Date: Mar 2011 Location: AZ Posts: 90 Trader Rating: (0) Feedback Score: 0 reviews	Do the injectors fire when you spin the distributor? __________________

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10-29-2015, 06:56 PM	#1
tuzzio Nissanaholic! Join Date: Oct 2013 Location: Western Mass. Posts: 2,254 Trader Rating: (3) Feedback Score: 3 reviews	KA-T with LS2 coils, no power to ecu/fuel pump? Okay guys. Just finished up wiring my ls2 coils. Went to plug in my laptop to change the settings in my aem and it won't connect or notice the usb cable, and my fuel pump doesn't prime, it did before this and the laptop has been plugged into the car numerous times. I used the diagram from aem's website. Its an s13 ka. http://aemelectronics.com/files/inst...Play%20EMS.pdf Coil triggers: Coil 1: #1 Coil 2 is #7 Coil 3 is #5 Coil 4: is #25 I used #21 for the ecu ground (sensor ground) One ground running to the head And the power is pin #36 which was previously running to a relay for the Hotwire mod So what gives? What did I miss? Last edited by tuzzio; 10-29-2015 at 08:00 PM..

10-29-2015, 10:23 PM	#2
unpaintedhatch Leaky Injector Join Date: Mar 2011 Location: AZ Posts: 90 Trader Rating: (0) Feedback Score: 0 reviews	Have you tried to restart you're laptop and AEM unit? Try the easy stuff first. __________________

10-29-2015, 10:36 PM	#3
Yellow4g63 Zilvia FREAK! Join Date: Jan 2003 Location: Socal Posts: 1,451 Trader Rating: (5) Feedback Score: 5 reviews	break out the volt meter and start double checking your grounds and power. __________________ 95 240sx RB20 415whp 91 Nx2000 VVL yo

10-30-2015, 03:29 PM	#5
tuzzio Nissanaholic! Join Date: Oct 2013 Location: Western Mass. Posts: 2,254 Trader Rating: (3) Feedback Score: 3 reviews	I spliced into the harness about 3" away from the ecu connector. Bump, still trying to figure this out.

10-30-2015, 07:25 PM	#6
giaolike Join Date: Oct 2015 Location: CA Age: 36 Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	break out the volt meter and start double checking your grounds and power.

10-30-2015, 09:27 PM	#7
unpaintedhatch Leaky Injector Join Date: Mar 2011 Location: AZ Posts: 90 Trader Rating: (0) Feedback Score: 0 reviews	Do you hear the relay on the AEM harness "click" when you give power to your ignition switch? __________________

10-30-2015, 09:35 PM	#8
Frank_Jaeger Zilvia FREAK! Join Date: Jan 2012 Location: Port Charlotte, Florida Age: 29 Posts: 1,352 Trader Rating: (1) Feedback Score: 1 reviews	You forgot to plug in your coils and left the stock KA spark plugs in instead.

10-31-2015, 09:22 AM	#9
tuzzio Nissanaholic! Join Date: Oct 2013 Location: Western Mass. Posts: 2,254 Trader Rating: (3) Feedback Score: 3 reviews	Just did some digging. Pin #36 needs to be connected for whatever reason, snipped and twisted them together, and now the fuel pump primes. Going to plug my laptop in and see what happens. If it has power, i'll take my power source for the coils from elsewhere.

10-31-2015, 09:57 PM	#10
tuzzio Nissanaholic! Join Date: Oct 2013 Location: Western Mass. Posts: 2,254 Trader Rating: (3) Feedback Score: 3 reviews	Anyways, Seems like for whatever reason, pin 36 needs to stay connected to factory settings. Used pin 28 for power and changed it in the standalone to 12v switched. Now the problem i'm running into is that I have no spark. I have power to the coils, but doesn't seem like its getting signal while cranking.