Injector problem

[dtareky]

I have recently repalce the #4 injector and after 6 months now i am having the same problem i had before i replaced it. It seems i have to replace the same injector again.
My car at idel shakes hard, I disconnect the connection to the #4 injector and no change in the idel when i do the same to any other injector the idel worsens so this leads me to belive that the #4 injector is the problem again. This will be the second injector i have changed in 6 months.

What could be causing this to happen?

I have a 1993 240sx coupe with a ka24de everything stock.

Dan

[jackjack]

are you changing them out with new or used injectors? i was going throught the same thing. that was only because i would get used injectors for free from the local junk yard. but yeah every 5-6 months.

[dtareky]

Yea the plugs that i used to replace the bad one was a used plug. That does sense thanks

[duffman1278]

I would try out another ECU, find someone who has the same ECU and working and see if it makes a difference.

[dtareky]

I will give the ecu change an shot i will let ya know