3d
The shower injectors don't do anything until rpm reach around 7000 rpm's or so. I think crossing the harness from top to bottom could be pretty hard and if the top where interchanged with the bottom the top throttle plates would prevent much fuel from getting to engine at idle. If you think they are crossed just unplug the 4 top injector plugs, if it doesn't run then they are reversed if not it should run fine and be a schoce lean up top. Now I have seen an injector harness plugged up backwards (cut Down Harness) changing #1 with #4.AND #3 AND #2 injector connector thus injecting fuel at the wrong time.
My bet is still on the ecm though an easy check and it seems to be a Suzuki thing most people just wouldn't understand.
Honest Dad himself
