Wired up a Avc-R WRONG HELP ME.

[nolandavid]

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

[Croustibat]

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]

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]

^^^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]

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

[Croustibat]

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

[Croustibat]

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]

ecu didn't look like there were any burns.

[nolandavid]

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

[Croustibat]

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]

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

[nolandavid]

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.