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Old 11-15-2021, 11:39 AM   #1
SuperFR-S
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Exclamation FR-S Pulsing Under Acceleration

Had a weird issue when was trying to go school today in my 2013 FR-S. My car would start pulsing/jumping whenever I would accelerate, it was extremely bad at lower rpms (below 3.5k) but seemed to get a little better when it was at higher rpm's. When I last drove the car it was fine, but it sat for a day and now this is happening, it was so bad that I couldn't make it out of my neighborhood. Has anyone else had any issues' like this? Any recommendations that I should check?
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Old 11-15-2021, 12:27 PM   #2
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CEL? I had an old Chevy pick up that behaved that way when the fuel pump was dying.
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Old 11-15-2021, 12:30 PM   #3
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CEL? I had an old Chevy pick up that behaved that way when the fuel pump was dying.
Nope no codes or CEL, it's pretty strange
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Old 11-15-2021, 12:36 PM   #4
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I'm not familiar with superchargers per se, but a slipping belt might cause those symptoms.
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Old 11-15-2021, 06:06 PM   #5
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Originally Posted by SuperFR-S View Post
Had a weird issue when was trying to go school today in my 2013 FR-S. My car would start pulsing/jumping whenever I would accelerate, it was extremely bad at lower rpms (below 3.5k) but seemed to get a little better when it was at higher rpm's. When I last drove the car it was fine, but it sat for a day and now this is happening, it was so bad that I couldn't make it out of my neighborhood. Has anyone else had any issues' like this? Any recommendations that I should check?

Have you tried disabling traction control with the 5-second button hold method? Maybe your traction control is kicking in for some odd reason like tires not at their optimum pressures.
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