Question about 1987 Mazda RX-7

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87 mazda rx 7 n/a cutting out at 4000rpm

Hey i have a 87 rx 7 and it runs great untill you hit 4000 rpm then it starts to cut out. any idea?

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Sounds like plugged up pre cats, my NA had the same problem I got a Racing Beat header that eliminated the pre cats and it went away. I've also seen them on eBay for cheaper. Either way you can't lose the stock header is like a cast iron stove attached to the engine it's heavy and massive.

Posted on Feb 04, 2009

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Car starts and idols fine but once you get it to 4000 rpm it cuts out and then every time you hit the gas it will accelerate then cut out. it doesn't die out until you do this for a long time.


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