Just to clarify, it was overheating and shutting off so you got an engine swap and now the engine is stalling at times and they think it is a misfire which an ECM will correct?
If this the case, either we are missing part of the story or they didn't do much investigation into the possible causes. Is the check engine light on? If so, what are the codes?
https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
If there is no check engine light then we need to start running through this guide that will help with a stall at idle:
https://www.2carpros.com/articles/stall-at-idle
The primary things we need to check are fuel pressure and for a vacuum leak.
Here are guides that help with this:
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
Let's run through all this material and go from there. If I am missing something please let us know and we can go from there. Thanks
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Sunday, January 10th, 2021 AT 10:15 AM
