Hello,
Would really appreciate any suggestions regarding my stalling 1981 rx7 GS. Owned since new and extremely well looked after. Collector plates with only 51,509 miles. Always garage kept.
For about 1 year, whenever engine reaches normal temperature (manual choke
closes/recesses) the car no longer maintains its 750 rpm and stalls.
Original carb.
Being serviced by an excellent and experienced mechanic who has extensive experience with Mazda rotaries. I gave him a carb tune up kit...from Atkins Rotary. He cleaned everything and checked for vac leaks. Checked all settings. Reinstalled carb and car still stalls. Terribly stressful!! He replaced gasket too.
He figures perhaps some electrical issue.

I need my super car running properly. Any suggestions will be greatly appreciated!!
Thank you!

All original. 1981GS.
June 2026.

 

Still sounds like a carb issue. The idle circuit has an issue. Could be clogged in the lower plate below the carb body or could be a fuel flow or contamination issue. Did you change the fuel filter? Does the fuel pump put out the right pressure and flow? Obviously it runs fine on the choke so that usually rules out some of t he fuel concerns. If you let it sit with gas that had ethanol in it for any period of time it could just be gummed up in one of the small passages. If you mechanic is not over 30 I wouldn't trust that he knew much about what he was doing with the carb refresh. Jus sayin.

 

Still sounds like a carb issue. The idle circuit has an issue. Could be clogged in the lower plate below the carb body or could be a fuel flow or contamination issue. Did you change the fuel filter? Does the fuel pump put out the right pressure and flow? Obviously it runs fine on the choke so that usually rules out some of t he fuel concerns. If you let it sit with gas that had ethanol in it for any period of time it could just be gummed up in one of the small passages. If you mechanic is not over 30 I wouldn't trust that he knew much about what he was doing with the carb refresh. Jus sayin.

You could try spraying carb cleaner in the carb or running a can of Seafoam through it to start with.