Is this an injector or a computer problem?

[Swanys]

have a 91 YJ with 2.5L. Fuel injected. Have injector pile on two outer cylinders but none on two inner cylinders. Have traced wires all the way back to computer with nothing happening. Thought was a computer problem replaced the computer and still nothing. Was hoping someone might have run into this problem before

 

[Swanys]

have a 91 Tj with 2.5L. Fuel injected. Have injector pile on two outer cylinders but none on two inner cylinders. Have traced wires all the way back to computer with nothing happening. Thought was a computer problem replaced the computer and still nothing. Was hoping someone might have run into this problem before

Sorry is a yj

 

[Chris]

What do you mean when you say "injector pile"?

 

[Swanys]

Sorry supposed to say injector pulse

 

[machoheadgames]

Not sure if you’re aware, but all of the injectors receive an ignition power source from the ASD. Have you confirmed those two inner injectors are receiving power? The computer pulses their ground to operate the fuel spray, so if the new computer didn’t fix it, you probably have a power problem.

 

[Swanys]

Not sure if you’re aware, but all of the injectors receive an ignition power source from the ASD. Have you confirmed those two inner injectors are receiving power? The computer pulses their ground to operate the fuel spray, so if the new computer didn’t fix it, you probably have a power problem.

I’ll defiantly check. I did know that they used the ground to pulse them. Thank you