1990 jeep cherokee no start

That leaves wires! Check all the grounds that are on the passenger side bolted to the block.

JoBo

You'd think so wouldn't you. However, I did check all these and the grounds are great. Turns over via starter with authority.

NEW INFO, fuel pump relay does not activate on cranking. When we jumper the ballast resistor wires it chatters like crazy.

K....injectors aren't firing. Can manually operate relay to activate pump but when cranking the injectors won't pulse or let fuel through. Sounds like CPS again, doesn't it?

GREAT NEWS!!!!!!!!! Problem solved. You're not going to believe it but it all comes down to wiring. (which I suspected in the first place but thought I had eliminated that). I went back into the harness and started checking wiring. I realized that when I was checking the ground wires inside the wire loom that I missed about a 18 in section just after the main splice on the firewall, engine side. They looked good but decided to investigate further. Upon a more thorough visual inspection I noticed two little pin holes where someone had apparantly probed the wires at one point in time. Remembering that the customer had told me he had submersed the jeep past the windsheild in soupy water at one time I decided to remove the covering on the wires.......They literally fell apart.

So....it all comes down to a bad ground. It was something simple but hidden.