Which tuner are you talking about? The MAF optimizer?? If so, it needs to be connected at all times.
99 Cougar V6 MTX...Plenty of mods
My best mod thus far:
Trans: Brand New MTX-75 with B1 gear set, Quaife LSD, 4.5 Final Drive, Spec Stage 1 Clutch, Spec Aluminum Flywheel...
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