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Never got mpg but minus three mpg. Got 20 mpg without stage one and 17 mpg with. It did gave good throttle responce. But after three months my 2001 ford crown victoria is now idling rough. Take the stage one off and it runs smooth. Idid replace all cold packs and plugs before i put on stage one. Very disapointed about this product.
Samuel A.'s review of Performance Chip Tuning earned 7 Very Helpful votes
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So.far so.good worked well on my 2004 chevy avalanche 5.3. Have noticed increased fuel economy...
Ordered for my 2018 GMC Canyon, plugged it in, turn ignition on without starting and waited about...
