Where is the ECM located on a 99 ford Econoline van 4.2L?

The Engine Control Module (ECM) on a 1999 Ford Econoline van with a 4.2L engine is typically located under the hood, near the passenger side fender. It's often mounted on the inner fender apron, sometimes attached to the firewall. However, its exact location can vary slightly depending on options and specific vehicle build.

To be certain, you should:

* Consult your owner's manual: This is the best source for the exact location in your specific vehicle.

* Look for a large, rectangular black box with numerous wiring harnesses connected to it: This is a good visual indicator.

* Use a wiring diagram: A wiring diagram for your specific year and engine will show the location of the ECM. You can often find these online through automotive repair resources or by searching for your specific vehicle's year, make, model, and engine.

Remember to be cautious when working near the engine compartment; the engine and various components will still be hot even after driving a short distance.