Catecm

The engine control module (ECM)  is one of the most important components of your highway truck. From calculating optimal fuel-to-air ratio to tuning engine spark, it’s responsible for controlling all of the engine management functions.  When the ECM has any problem, it can cause all sorts of issues with your highway truck. In this article, we’ll have a look at the five telltale signs of a bad ECM and how to perform a diagnosis. Let’s get started! Truck won’t start If your truck doesn’t start or take hiccups during startup, the chances are that something’s wrong with your engine. While the problem can range from a clogged fuel filter  to defective ignition switch , but once you rule out these possibilities, the ECM likely requires repair or programming.   Stutter in engine An engine stutter is caused due to fatty fuel-to-air ratio, which can again indicate a problem in ECM. The science behind this problem is fairly simple. The mass airflow sensor relays information to