I Really Need Help On My Coupe

[Onlynissan240]

So i got the car to run again, but when i start it it will run fine, then when i hit the gas a little and idle back down then its like 1 of the cylinder isn't firing, I'll let the car sit for about 5 minutes and start it and it will be fine again till i hit the gas.. WTF??

Then as i was starting it this last time a chip in my ecu fried up (circuit QA458)
This s*** just inst making any sense to me.

[Onlynissan240]

I know its got to be something stupid simple, ive just been workin at it for the past 3 days with little luck.

[speedeast]

It sounds electrical man. I'm usually pretty good at diagnosing these things... in person. Check all of your fuses. Inspect your wire harness for unplugged connectors, stripped or frayed wires, short circuits, etc.

[Onlynissan240]

Thats what i thought too, but ive looked throughout the entire wiring inside and out, it all appears good to the eye.

[Onlynissan240]

Ok so i narrowed it down a little... The injector on cyl #2 is either frozen or clogged cause #2 cyl is not getting fuel. I pulled wires off of each plug till it didnt make a difference in how the motor was running. So i know what direction to take on that one but im still unsure why my ecu fried...

[speedeast]

See, that's why I wanted to lean toward wiring. Make sure all of your grounds are hooked up properly along the harness, good never comes from those being unhooked. I would hate for you to put another ecu on there just to have it fry again. As far as injectors, all of the wiring to injector #2 is good? Check the ecu connector and make sure the wire for #2 is good to go. There is an ecu connector diagram in the back of the FSM. Should be the only wire that's yellow with a black stripe.

[Onlynissan240]

Well i ended up changing out the injector and that was that problem, the car runs fine now besides higher idle at 1200 rpm. Still need to figure what the QA458 circuit does and why it would fry.