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Acceleration studdering?

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  • Acceleration studdering?

    Hey guys was wondering if someone can help me out with this. I have a stock 1989 s13 with a ka24e engine. I've got this problem whenever I rev to 1500 rpms I get a pulsing in the acceleration. If I slowly hit the gas and let off (just a bit) at around 1500 rpm it happens. This usually happens at lower speeds from 1300-1800 rpm. If I just keep constant gas and pass 2000 rpms the problem doesn't appear anymore. (Excuse the rattling, my exhaust is a bit loose)

    Heres an audio below:

    What do you think the problem is? Fuel injectors? or motor mounts?
    Last edited by Tieny; 08-04-2013, 07:03 PM.