Hillbillyag

iTrader: (2)

I have an 83 rx7 that I purchased two years ago from a field in Wyoming. It had been sitting for four years before purchased. I did all the normal procedures for getting it going again and it worked. I have since put 13k miles on it and it has been running great. The only thing I have not been able to figure out is the very lumpy idle. It seems to jump between 600 and 750 rpms. It also has a slight stumble at 2000 rpm.

Today I was coasting to a stoplight when the engine died. My heart sank as memories of my first car's departure coasting to a stoplight came to mind. I restarted the car and it idled smoothly at 700 rpm. The hesitation at 2000 rpm was also gone. It feels like it has slightly more power and is smoother. I have started it three more times and it idles perfectly at 700 rpm every time.

Any clues what might have fixed itself? I should note that all routine maintenance has been done routinely including plugs, wires, cap, rotor, fuel filter, and oil changes. Thanks to anyone who has any ideas.

OneRotor

iTrader: (3)

maybe you finally unstuck a seal?

Kentetsu

Have you run any Seafoam through the gas tank yet? Might be a good idea, especially since she was sitting for so long... A couple of good redline runs each day could also help.

As to why this happened, I'd say Whitey hit the nail on the head.



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Hillbillyag

iTrader: (2)

Thanks guys. I figured somebody would know. I have been running one can of seafoam in a tank after every oil change. Maybe I should run a more concentrated dose when I get low on fuel next time. Thanks for the quick responses.

NCross

iTrader: (18)

Maybe a chunk finally blew out of a jet?