In-depth, insightful content for the Chevy 4.3 EcoTec3 engine. Currently we have a GM 4.3 EcoTec3 engine problems guide and an article on deleting or disabling AFM. However, we plan on adding additional content for the 4.3L V8 so check back in the near future.
The 4.3 EcoTec3 is the smallest engine of the EcoTec engine family, and also the only V6 available. It’s smaller size of course results in a good bit less power and towing capacity than you get out of the V8’s in the family. While the 4.3 EcoTec3 is built the be heavily modified, there are…
The 4.3L EcoTec3 engine became the new base half-ton truck option after the retirement of the Vortec engines. As such, it was built to be able to tow a decent amount of weight and provide strong reliability. Unfortunately, GM missed the mark on a few things with this engine, leading to some common problems. The…
AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. AFM works by deactivating half of the engines cylinders under certain circumstances to reduce fuel usage. It essentially turns your V8 engine into a V4 which saves fuel. GM claims fuel improvements ranging from 5%-15% depending on the engine. So why…
