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Originally Posted by tomtom11
UPDATE: alright so this may add to the confusion or may help one of you solve my problem. I turned the jb4 to map 0 and it feels like it always did when it didnt have a tune. so i have none of the hesitation under 4500 rpm and it pulls harder than the jb4 has been at low rpm with moderate throttle. the jb4 obviously use to be way faster than stock, but now it doesnt feel as strong as stock, one of the settings must be messed up or something. does anyone have any idea what could cause the car to feel perfectly fine with it on map 0, and have no power until 4500 rpm with the tune on map 2 or 5? thanks
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If turning the jb4 to map 0 fixed it then the only logical explanation would be timing right? If it was the intake valves you would feel it whatever map you are on. Did this just happen all of a sudden or has this been an issue for a while?