Hi all it’s been a while. My truck cuts out after start up, sometimes went putting it in gear. New Optimizer build. Everything is pretty much new. See Signiture . Never while driving. It will do it every morning and then after going somewhere and restarting it. But not every time. Checked all Grds., wiring harnesses and connectors. no DTC. Fuel press good.
no air in clear return line going to IP. LP volume test.
The only thing that i transferred from the old motor was the PDM and extension harness. They worked fine on the old motor. I did have another known good PDM and tried it. No dice. I was going to bypass the extension harness by plugging one of the PDM,s directly to the upper engine harness connector by the IP but neither one would plug in. Wrong connector on the upper harness. It takes a PDM that has the square ears on it . Mine are both the curved ear type. I sure hate to buy another extension harness just to check the one on there now. I tried using my Tech 2 to see what the IP pump is doing. But it happens right after start up and I have to re- enter motor info after start up because the scanner disconnects when cranking on start up. It happens to fast. I sure hope someone on here experienced this problem before. It’s getting very annoying. Worried about reliability. Thanks.
https://youtube.com/shorts/59tbVMGnJ...xQYUw_C6V8Ri9f

watch the RPM gauge it’s just a fast stutter.