1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Car shutters when acc.

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Old 01-06-11, 05:48 PM
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85 RX-7

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Car shutters when acc.

Coming back from school the other day. Stopped and then took off like normal. But whenever i gave it throttle, the car just started to shutter violently. it's not missing at all i know. it's kind of like bogging down real bad. I've checked all the ignition and that has checked out fine. The carb that i got is a RB Holley 465. I really need help getting this fixed cause the car pretty well will not drive.
Old 01-06-11, 09:06 PM
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Old Fart Young at Heart

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Does the engine idle normally? If so, check fuel supply starting with a new fuel filter, then the volume/pressure test listed in the FSM. If the idle is rough, perform the ghetto compression test.
Old 01-06-11, 09:39 PM
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shutter valve, under the carb on the drivers side. or some other large vac leak. would be my guess.
Old 01-06-11, 10:58 PM
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Have RX-7, will restore


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i would first do a comperssion test. what rpm is the engine idling at and does the car have a catlyitic converter?
Old 01-07-11, 10:26 AM
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85 RX-7

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The compression is good. More than 100 psi on both front and back. My idle is perfect 750. No cat. Ive checked for vaccum leaks and havent found any at all. Wht is the shutter valve
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