Howell EFI 258....no fuel spray from injectors

[Aggie CJ 83]

Howdy. I am new to the site and after reading posts from some of the knowledgable Jeepers out there I need some help. I have an '83 CJ with a Howell fuel injected AMC 258 i6 / 4.2l . I was driving the other day and it just died. It will crank, but no fuel spray out of the injectors.

I recently did a tune up, plugs, cap, rotor, new coil, battery cables, and battery terminals. I have checked all the fuses on the fuse block and the EFI system, all are good.

I called Howell and their Tech Support (Troy) was helpful in trying to diagnose what the issue is. I checked the fuel pump by jumpering the Orange and Red wires on the fuel pump relay and the pump comes on and runs and pumps gas through the system, but still won't fire over.

Replaced the ECM and fuel pump relay and still cranks, but no fuel to the injectors. Just replaced the Ingition pickup on the dizzy and same story.....cranks, but won't fire over.

Anyone have any additional ideas or items I can check. Thank you.

 

[Torxhead]

My first guess would be a wiring issue, like something came loose. When you turn the ignition key to the on position, the fuel pump should come on for a couple of seconds, charging the fuel system. If any componets failed, it could be the fuel pump relay. Do you have the instruction and troubleshooting manuals to check with? If you hook up an ignition timing light up, point it down the throttle body and turn the engine over with the starter, it should flash onto the spray coming out of the injectors.

 

[Lumpy Grits]

The FP runs off a tach sensor on the Howell-IIRC.
LG