1991 Chevy Lumina will not start unless I ground the red wire on the #6 injector

What is your question?

Has good spark, plenty of fuel, fuel pump is working. When it does start after grounding the injector it runs like a top. I ground #6 because it is accessable.

What makes this problem better or worse?

Same hot or cold

How long has your 1991 Chevrolet Lumina had this problem?

intermitent for about one month but now permenant