Originally Posted by 07JeepXK Im confused. Once the ecu learns the new tune the vehicle should run faster...not slower Also if your power wire didnt work and the ecu hasnt learned the tune then how would your 1/4 time be faster? Ive herd from a few people on here that your ecu will figure out you've changed the tune and go back and correct it. Which wojld make ot slow again. .05 in a 1/4 mile is nothing. It could have been something like hitting one less bump in the road
JBA 4XG S4XC
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