nobody told you to put the battery cables on BACKWARDS


Basically what they told you to do is this:

Disconnect the positive cable from the battery.
Disconnect the ground cable from the battery.

With ALL cable disconnected from the battery, touch the red and black cables together.

The idea is this will accelerate draining down any residual voltage stored in capacitors inside the computer causing it to forget everything it learned from the past.

The instructions in the previous post might have been poorly worded.

Good on You for NOT hooking them up backwards.

 

If all this fails go back to that injector o ring idea. Ive seen the tiniest nick cause that injector to poor fuel. It'll still run cuz the other injectors are functioning still it just runs insanely rich an misfires everywhere. Everything else that's been suggested is where I would start first but if u can't find anything else pull the fuel rail an give everything a close look.