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This morning I followed the diagnostic procedure according to the Haynes manual for voltage to and through the MAP. All checked out within spec. No change needed. FYI though: replacement costs: O'Reilly - $93.99, Advance Auto - $97.99, NAPA - $123.99. It would have paid to shop around.
Just wanted to post that I am about just under 1/2 tank and did some little highway driving as I used this truck to get to work, so the 10 mile trip with mix intown driving, I only average around 11.5 mpg not much if any improvement over previous. But powerwise however is a totally different story. I really feel like my 5.9 just got a 50 hp boost! Now to start looking at replacing my O2 sensors. If this does not give me any better mpg, I guess my R/T is just plain thirsty!