Bucking and hesitating
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Joined: Sep 2010
Posts: 31
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From: Tennessee
Bucking and hesitating
My IX is built, pistons, rods, GSC S2 cams, FIC1200, brand new walbro 255, tuned on 93. Cold start is great, AFR usually holds ~14.7. It’s when I try and drive the car there is some really awful bucking/hesitating, car goes lean, then rich, and ultimately it dies out. All
this happens at about 1/4 throttle and the car is unmanageable. Has anyone had this issue and resolved it? I’ve tried swapping fuel pumps, adding a FPR (set to 38 psi), not sure where to continue investigating anymore. Any suggestions are greatly appreciated.
this happens at about 1/4 throttle and the car is unmanageable. Has anyone had this issue and resolved it? I’ve tried swapping fuel pumps, adding a FPR (set to 38 psi), not sure where to continue investigating anymore. Any suggestions are greatly appreciated.
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