Guys, I need some help, I'm stumped. I have a 1990 2.4 MM, 5 speed, with 335,000 miles. She has been a great truck, and finally bit the bullet. I was headed to school one day (20 mile drive) and she started getting sluggish. Didn't want to make any power. I got to school, and realized it was using gas like crazy. I had to make it home, so i drove it. About 3/4 of the way, it got worse, couldn't make it over 40 MPH on the interstate, and slowly got worse, leaving me on the side of the highway. It seemed like a cat was clogged or something, so I went back to the truck and removed the exhaust. Still same issue, so I towed it home.

I changed fuel filter to no avail. Now I'm stuck. I pulled the MAF and it appears to be new. I did read that it is not cleanable, and they are super expensive. There's my problem. I don't want to spend $150+ on a MAF and it not be the issue, seeing as though it's an electrical part and not returnable.

Any ideas?

Thanks in advance.