I just purchased a 2005 srt6 with 60k miles on it. When test driving I noticed a distinct loss of power at times. Having experience with forced air motors I sensed a faulty blower, after researching and reading the numerous posts on faulty cooler pumps I replaced mine after committing to the purchase of the car. At first I thought the problem was fixed, however upon driving a bit more discovered the problem still exists. I can feel, while cruising, what I suspect to be a disengagement of the clutch that drives the blower shaft after the engine warms up. I get a brief drag or surge when driving a steady speed at random moments. The feeling is similar to the feel one gets when an ac compressor engages and disengages on a 4 cyl. motor while driving. I do get unbelievable power in the first 5 minutes of driving and can drive the car hard without issue. Once the engine temp gets to normal operating range, the blower works intermittently. I feel it is definitely heat related. So the question is, do I replace the temp sensor next? Any other thoughts? Once done there I would like to pump up the performance any tips here?