Hoping somebody here is smarter than me. I have a 360 w/ howell tbi and dui ignition that I ran in my Willys Wagon for a few years. Recently I ended up scrapping the Willys because rust had gotten extremely bad and I picked up a 73' J4000. I put the motor in the J4000 hooked up the dui and howell system cranked it over and had no injector pulse and no spark. After some testing figured out ignition module was bad, replaced it now I have spark but no injector pulse. I gave it a little shot of either and fired right up but died once the ether burned off. So far I have rechecked all my grounds, verified tach signal going to white wire on howell harness, power to howell fuse block wire in cranking and run position, orange wire has power in crank and run, purple wire gets power during cranking only but still no injector pulse. The fuel system is on its own circuit due to a couple years ago I had some wiring issues on the trail and ripped off fuel pump wiring and put it on a switch and have grown to like it that way. I hide the fuel pump switch as a little bit of extra security. Fuel Pressure is great have checked at tbi and at pump both times inline to make sure regulator was working.
Anyways does anyone know of anything else other than ecm that could cause the lack of injector pulse. Find it odd that it ran great in my Willys pull it out and swap everything over and now no injector pulse. The ecm is grounded through its mounting. Does it need an additional ground wire or does it need to be not grounded couldn't remember for sure on this.
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