i've recently been told that my rpm in my car varies and may be messing with performance. i was told that at one point it was very low and it could maybe due to the fuel line. i have an 88 pa, and it doesn't have anything in it to see the rpm, is there any other way to tell?

If you have a full function OBDI scanner, you can view engine rpm. If not, you could install a temporary tach.