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whats up everyone i just got a 87 300zx for 400$ and it boggs out if i go past 4,000 rpm does anyone know what it could be...could it be the mass air flow sensor? thanx
 

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mine did the same thing off the line, you could excel really slowly but any quick throttle response was gone when not in neutral due to the weight of the car. It could be a vacuum advance issue, or you may just need to advance the timing 10 degrees-ish.
 

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I got an 85t and i replaced all the belts. I had mine set to 0 degrees and it did the same thing. So i advanced the crank by 10-15 degrees and now it runs better than ever. But try the small things first. Good luck.
 

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Welcome to the forum, you should check your spark plugs and wires.
 
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