Question about 1984 Mazda RX-7

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Looses rpm while driving

While driving my car for a short time the drive train started jolting, like it had an electrical intermittent, and then stalled when I came to a junction. Tried to re-start but would not fire. I then held the accelerator to the floor and tried gain. After about 20 seconds there was a load squeal and the engine began to rev up, but only to 3000rpm. It was coughing and spluttering but I put it in gear to see if I could move. With the accelerator to the floor the car crawled along at about 10mph for a short distance then suddenly the engine rev-ed up to 6000rpm and took off. After I parked the car I restarted it (no problem) I checked the exhaust looking for clues. There was nothing visibly unusual but the exhuast was very hot.

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  • bobgepp May 26, 2008

    Thanks for your response. Actually it was the second time it happened on the same day. What kind of blockage are you suggesting?


  • bobgepp May 28, 2008

    Thanks again for a quick response. A fuel blockage makes sence since it is easy to flood a rx7 if turned over for long without firing. Fuel pump and filter was changed less than a year ago, so should be good. I'll take a look at the wiring. Thanks again.



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I had something similar happen, my clutch was just worn out. The car stalled on me, (for another reason), and couldn't turn it back on with the key (flooding), so I left it alone for a minute or two, and then I was able to turn it on. I had the clutch replaced and everything was fine.

Posted on Oct 29, 2008

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Keep an eye on it it may have had a blockage somewhere that has now cleared if it happens again i will try to help out with info

Posted on May 26, 2008

  • shane donegan
    shane donegan May 27, 2008

    possibly a fuel blockage? try replacing fuel filter and check your fuel pump even run a fuel treatment also inspect the engine wiring and clean contacts where necessary inspect rotor button and dizzy cap even inspect spark plugs and the color of your exhaust tip if its burning properly should be a light grey color if its black its running to rich same with plugs also if you want to be sure chuck it on a machine like at ultra tune or somewhere like that other areas to explore you could try mazda rx7 chat forums hope this helps



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