I have finally determined that my crankshaft position sensor on my 98GT is the reason my rpms are giving me a false reading being that it measures the rpms of the crank. I got the part, but the problem is that I crawled under my car today only to find out that there's no way to get the old sensor out due to the limited space between the sensor and the AC compressor/clutch unit. Anyone else have any experiences or tips on this???