1997 Ford Probe Misfire at Low RPM

Are there any engine codes on the dash? That's good, you may just have a ton of carbon buildup in your fuel system. One thing I would try that I have seen make a HUGE difference in high milage cars with a bad idle is a fuel system cleaning. You can buy a nice 3 part set at the auto part store. First part clean your throttle body. Open the butterfly valve and clean the rim. Next run an additive like sea foam though your break booster vacuum line into your intake (this part is nice to buy in the set because it comes with a tube that connects the bottle to the vacuum line and vaporizes the additive before it enters the intake) but you can just buy the liquid sea foam and let it SLOWLY suck it out of the bottle, too much liquid can cause vapor lock which inst good. Next part clean your throttle body, open the butterfly valve and clean the rim. Lastly put an additive into the fuel tank to clean your fuel injectors. Now you have done all three parts, hook back up your vacuum and start up the car, may be a little hard at first. Take the car up to 2K rpm for 30 sec the idle for 30 sec then back to 2K 30 sec. Should smoke quite a bit. Let me know if it makes any difference for you.

The MAP sensor and IAC sensors do sound like likely culprits to your problem, If there bad you would definitely see a power loss. Unfortunately im not sure where your MAP sensor is located on your car. Best I can say is its measuring manifold pressure so its probably on or near your intake manifold. I also saw that the sensor was $400 at the auto parts store. You may want to invest in an auto repair manual for your car, it would definitely tell you the location of the sensor as well as some other helpful trouble shooting. As far as replacing the sensor goes try finding a used auto parts store or a junk yard we have one near me called pull and pay self service auto parts. If they had a ford probe you could remove the sensor for less than 10$ and give it a shot. Let me know