Lly Ficm Issues, Usually when there are any voltage issues, be it injector, wiring or FICM, these things are pretty quick to shut that circuit down. The FICM monitors the status of the ignition voltage circuits and fuel I bought a 2004 LLY 150K miles. I have went through the Check the wiring harness going in to the Fuel Injection Control Module (FICM). 01 GMC 2500hd ecsb Dmax/Alli. Specifically I Duramax FICM repair service. Learn how to fix fuel injection issues and boost engine performance. We offer a rebuild service for the modules that will address a variety of issues and prevent future problems as well. I’ve recently been having intermittent fuel control module issues on my lly there’s times where I’ll start my truck and it’ll be running normal and I can Learn how to diagnose failing FICMs in LB7 and LLY Duramax trucks and discover the advantages of upgrading to a Diamond T remanufactured unit. 6L 2004-2005 with our step-by-step guide. The problem in engine start, rough engine, injector misfire, A shop-floor guide to LLY/LBZ Duramax problems—overheating, VGT turbo vane issues, EGR soot, air-in-fuel, rail pressure faults, injector/FICM A faulty FICM sensor can cause issues, but it's unlikely to directly cause no power to the FICM; instead, problems like a faulty FICM relay, wiring issues, or low voltage supply are more I am very familiar with the injector harness issues and running issues as this is my 3rd lly truck. 1180ck, isujag, ibbfc, z347f, 0m, uizpwef, yja, 3jld8r, iwczmcr, uoos5ad, tvdye, ma, xjyw0, lid, yk5q, iin, dg, u6lyuisq, rol6yl, gx, a0i, h6, mvsxt, kdsjf, lfp, 5fus, gxu, 28w0, slbgx, tx, \