I'm having an issue with my 93 Grand Cherokee with 193k miles.
The RPMs will fluxuate and even drop to 0 at times and the whole Jeep with shudder and shake and then the RPMs will return back to normal. It could just drop down once, or several times in a row. I've even had it completely die a few times and I'll have to restart it. It's the worst when idling or driving slowly, like through a drive through or a parking lot, but the Jeep will still give a small jerk at times during acceleration as if it's trying to do it but can't completely.
I know next to nothing about cars but I have a friend who has helped me with a few things. We changed the fuel filter which he said looked like it may have been the stock fuel filter. He hooked up his compressor and blew all kinds of black garbage out of it and concluded it definitely needed a new one. He told me just to run it and see how it did, which it did fine for awhile but today it seemed to be acting the worst ever with it shaking and shuddering and trying to die but it didn't. He also looked at the spark plugs and told me that while they were aged they didn't look bad enough to be worth the money replacing.
I tried to get a recording of it doing it while idling but of course as soon as I pulled out my phone and started the video recorder it stopped misbehaving. It also wouldn't do it while I had it with my friend. Funny how that works...
I thought I'd see if anyone has any suggestions or thoughts.
Thank you very much for everyones time.