Engine idling rough with a misfire, when I turn the heater on the engine shuts off

Hi,

This sounds like either an engine vacuum leak issue or the idle air control valve is failing.

Do me a favor. See if the same thing happens when you turn the A/C on. Also, pay attention to see if when this happens, the defroster is on.

Also, take a look through this link. It explains how to locate and repair an engine vacuum leak. If you don't find any, we will need to dig a bit further into the idle air control valve. That component is located on the throttle body and is responsible for maintaining the engine's idle speed.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Take a look through this link as well. It explains how the IAC works and what it does.

https://www.2carpros.com/articles/how-a-idle-air-control-valve-works

Let me know as much as you can. And hang in there. We'll get it fixed.

Take care,

Joe