Wired up a Avc-R WRONG HELP ME. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nolandavid · 08-10-2013, 09:34 PM

So i have problem, i wired the injector and rpm together to the avc-r, which is a purple wire. Once i did this,

I proceeded to go further with my stupidly, and turn over the key. this popped a few of my fuzes. Now,the car will no longer fire up; it will turn over sometimes, and I have spark to the plugs. I've fix my wiring mess up, and pulled off the fuel rail with the injectors in it. I also turned over the motor and no fuel coming out. So my question is, why do I have intermittent problems with the motor turning over, and is there a way i can test the ecu to see if it's bad? PLEASE HELP

Croustibat · 08-11-2013, 04:03 AM

Let me explain.

Rpm sensor is a somewhat passive component, nothing wrong there.

However, injectors are directly connected to your battery on one side, and to your ECU on the other side.

So if you are lucky you may only have killed your battery or some wires. If you are not, that is going to cost you quite a bit : injector drivers in the ecu (4 big power transistors and maybe the circuitry), injectors.

Check your ECU first for burn marks.

nolandavid · 08-11-2013, 12:38 PM

thanks man. Any idea why the start up problem? some time's it will turn over fine then nothing but ticking. Will test battery.

*fliprayzin240sx* · 08-11-2013, 07:51 PM

^^^Did you even read what he said? If he said you could have fried your computer, what makes you think it would start if its fried?

nolandavid · 08-11-2013, 08:22 PM

yes i did, this is why i was that question. ecu looks good

Croustibat · 08-12-2013, 06:03 AM

Did you open your ECU and check if the circuitry was good ?

Croustibat · 08-12-2013, 06:05 AM

You could check the dropping resistors too, that may be why injectors arent firing. They should be around 6 or 12ohms each, cant remember exactly . disconnect it and check with an ohmmeter.

edit: check injectors too (disconnect them before). They should be around 3 ohms each.

nolandavid · 08-12-2013, 11:12 AM

ecu didn't look like there were any burns.

nolandavid · 08-13-2013, 11:16 PM

Tasted the injectors with in spec, also battery is good. I'm loosening if now!

Croustibat · 08-14-2013, 12:36 AM

If you still have no fuel you can check your fuel pump and fuel pump fuse ...

removing the injector ramp and turning the CAS manually should make the injectors fire . If they dont, you have a fueling problem. Testing the fuel pump is easy, testing injectors is a bit tricky; you need to ground the wire that comes out of the dropping resistor to open each of them. You could ground them directly (careful, the second pin has 12V) but dont keep it for long, just connect to ground, see if it sprays fuel, disconnect, or you can fry them.

If the pump primes and injector fires, it can be ECU, CAS or wiring ... but if you have sparks, it is not the CAS.

nolandavid · 08-14-2013, 09:31 AM

Ya I have spark, and have fuel pessure I'll try your injector idea.

nolandavid · 08-14-2013, 12:03 PM

So I've got the car idleing now, not sure wha what I did to achieve this, but it's a rough idle like a cilyder not fireing. So what I've done so far... When the car was idleing I've pulled off one injector clip at a time to see if it get better or worse. No luck there, and the same with the coil packs.

08-10-2013, 09:34 PM	#1
nolandavid Zilvia Member Join Date: Nov 2007 Location: redlands Age: 37 Posts: 236 Trader Rating: (11) Feedback Score: 11 reviews	Wired up a Avc-R WRONG HELP ME. So i have problem, i wired the injector and rpm together to the avc-r, which is a purple wire. Once i did this, I proceeded to go further with my stupidly, and turn over the key. this popped a few of my fuzes. Now,the car will no longer fire up; it will turn over sometimes, and I have spark to the plugs. I've fix my wiring mess up, and pulled off the fuel rail with the injectors in it. I also turned over the motor and no fuel coming out. So my question is, why do I have intermittent problems with the motor turning over, and is there a way i can test the ecu to see if it's bad? PLEASE HELP

08-11-2013, 07:51 PM	#4
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	^^^Did you even read what he said? If he said you could have fried your computer, what makes you think it would start if its fried? __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

08-12-2013, 06:05 AM	#7
Croustibat Nissanaholic! Join Date: Aug 2011 Location: France - Toulouse Age: 44 Posts: 1,851 Trader Rating: (0) Feedback Score: 0 reviews	You could check the dropping resistors too, that may be why injectors arent firing. They should be around 6 or 12ohms each, cant remember exactly . disconnect it and check with an ohmmeter. edit: check injectors too (disconnect them before). They should be around 3 ohms each. Last edited by Croustibat; 08-12-2013 at 11:34 AM..

08-11-2013, 04:03 AM	#2
Croustibat Nissanaholic! Join Date: Aug 2011 Location: France - Toulouse Age: 44 Posts: 1,851 Trader Rating: (0) Feedback Score: 0 reviews	Let me explain. Rpm sensor is a somewhat passive component, nothing wrong there. However, injectors are directly connected to your battery on one side, and to your ECU on the other side. So if you are lucky you may only have killed your battery or some wires. If you are not, that is going to cost you quite a bit : injector drivers in the ecu (4 big power transistors and maybe the circuitry), injectors. Check your ECU first for burn marks.

08-11-2013, 12:38 PM	#3
nolandavid Zilvia Member Join Date: Nov 2007 Location: redlands Age: 37 Posts: 236 Trader Rating: (11) Feedback Score: 11 reviews	thanks man. Any idea why the start up problem? some time's it will turn over fine then nothing but ticking. Will test battery.

08-11-2013, 08:22 PM	#5
nolandavid Zilvia Member Join Date: Nov 2007 Location: redlands Age: 37 Posts: 236 Trader Rating: (11) Feedback Score: 11 reviews	yes i did, this is why i was that question. ecu looks good

08-12-2013, 06:03 AM	#6
Croustibat Nissanaholic! Join Date: Aug 2011 Location: France - Toulouse Age: 44 Posts: 1,851 Trader Rating: (0) Feedback Score: 0 reviews	Did you open your ECU and check if the circuitry was good ?

08-12-2013, 11:12 AM	#8
nolandavid Zilvia Member Join Date: Nov 2007 Location: redlands Age: 37 Posts: 236 Trader Rating: (11) Feedback Score: 11 reviews	ecu didn't look like there were any burns.

08-13-2013, 11:16 PM	#9
nolandavid Zilvia Member Join Date: Nov 2007 Location: redlands Age: 37 Posts: 236 Trader Rating: (11) Feedback Score: 11 reviews	Tasted the injectors with in spec, also battery is good. I'm loosening if now!

08-14-2013, 12:36 AM	#10
Croustibat Nissanaholic! Join Date: Aug 2011 Location: France - Toulouse Age: 44 Posts: 1,851 Trader Rating: (0) Feedback Score: 0 reviews	If you still have no fuel you can check your fuel pump and fuel pump fuse ... removing the injector ramp and turning the CAS manually should make the injectors fire . If they dont, you have a fueling problem. Testing the fuel pump is easy, testing injectors is a bit tricky; you need to ground the wire that comes out of the dropping resistor to open each of them. You could ground them directly (careful, the second pin has 12V) but dont keep it for long, just connect to ground, see if it sprays fuel, disconnect, or you can fry them. If the pump primes and injector fires, it can be ECU, CAS or wiring ... but if you have sparks, it is not the CAS.

08-14-2013, 09:31 AM	#11
nolandavid Zilvia Member Join Date: Nov 2007 Location: redlands Age: 37 Posts: 236 Trader Rating: (11) Feedback Score: 11 reviews	Ya I have spark, and have fuel pessure I'll try your injector idea.

08-14-2013, 12:03 PM	#12
nolandavid Zilvia Member Join Date: Nov 2007 Location: redlands Age: 37 Posts: 236 Trader Rating: (11) Feedback Score: 11 reviews	So I've got the car idleing now, not sure wha what I did to achieve this, but it's a rough idle like a cilyder not fireing. So what I've done so far... When the car was idleing I've pulled off one injector clip at a time to see if it get better or worse. No luck there, and the same with the coil packs.