Question about 1991 Mazda RX-7

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1991 RX7 has no power. Have to downshift to go at all. Check engine light is on most of the time.

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Hello fellow Seven owner, I would first check your spark plugs, you should replace them every 10-15k, I do mine every 8 months or so. Also if you have a way to check the compression in your rotors do that as well. You may also want to replace the O2 sensor, it really easy to get to and inexpensive.

Posted on Sep 28, 2009

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Posted on Jan 02, 2017

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How do you a just the vacum valves on top of the engine for the right performance on a 82 mazda rx7 gx


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Just check vacum valve adjust guide in the Mazda RX7 GX Repair Guide Manual available at:

http://findpdf.net/pdf-viewer/MAZDA-RX7-198688.html


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Was driving my 1991 Honda Civic two days ago and the check engine light came on, the car lost power but the engine was still on, turned engine off waited a few minutes car started the check engine light...


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A loud rattle started under the valve cover, now it dies everytime I put it in neutral or downshift, and it lost alot of power


On the older honda engines the valve have to be adj. every 100k. this is also when it was recommended to change the timing belt. I would first changes the timing belt, and then readjust the valves. If this does not fix the issue then it may be a bad valve seat or bent valve.

Mar 02, 2011 | 1991 Honda Accord

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Look for restrictions in the intake air and exhaust systems. Check fuel pressure and delivery (fuel filter/pump). Check the ignition system as well. If the engine has a lot of miles, you may be experiencing combustion seal wear. These are amazing engines when they work correctly! Good luck!

Mar 15, 2010 | 1993 Mazda RX-7

1 Answer

Check engine light comes on and car starts to downshift hard


Please take the car for a scan to reveal any problem/ error codes causing this.

Good luck,

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I just purchased this vehicle. It has the 3.0 liter engine and 139,000 miles. It is not overpowered by any means and sometimes when you step down and it should downshift it does. Other times you can go to...


SOLENOID ARE NOT ACTIVATING WHEN THEY SHOULD CHECK THE COLOR OF THE TRANSMISSION OIL IF ITS DARK BROWN AND SMELLS BURNT THEN YOU HAVE A WORNED OUT CLUTCHES

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Top will not go up


apply 12 volts to the top motors independantly after you check fuses of course.. see if the motors are bad. they usually go out at the same time.. not too bad to replace.

May 26, 2009 | 1991 Mazda RX-7

1 Answer

Has no power


I had the same problem on my 1990 gtu. i replaced the coolant temp sensor located behind the water pump. have not had a problem since. 

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1991 nissan engine


check the distributer cap same problem with my 91

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