I own a 1999 Ford Ranger. About two weeks ago, the engine started acting up. While the truck is idling, the RPM will drop down very low (like .5) and begin to sputter, then shoots up to about 2-2.5 RPM, then back down to .5. Sometimes it will drop so low that I have to give it a little gas to keep it from going dead (which it has a few times).
The motor has around 150k miles I would say (engine was replaced a few years ago, so the odometer shows higher than the engine). My water pump is also going bad, but I am having that replaced this weekend.
Here is a link to a video I did so y’all can hear/see what’s going on.
Thanks for your time and any advice y’all can give.