1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

missfire problem/stumbling

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Old Jun 1, 2005 | 02:08 AM
  #1  
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missfire problem/stumbling

Ok first thanks to all who helped me with my timing problem ( some how it fixed it self) now with that sayed and keping in mind that the timing is where its suposted to be and i have a new set of wires,dis and cap, the car has a missfire/stumbling at adle, while reving and holding it at any RPM. could this be caused by the car sitting for 3 years (i ran the car all last summer at first it would not idle by its self but after driving it for 2 weeks it setled it self and keeped runing with the odd miss fire) dose any one think i should get the carb rebuilt and or cleaned? and what else could cause this missfire/stumbling. thanks for your time in advance
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Old Jun 1, 2005 | 07:35 AM
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From: Saskatoon, Saskatchewan, Canada
Are the plugs new?

A slight misfire/stumble at idle and at constant RPM could be a vacuum leak. Of course, if the car was sitting for a few years with gas in the tank and the carb, I'd do a carb rebuild. It's surprising how gummed up all the jets and air bleeds can get. I just did a carb that was sitting and a couple of the jets were so clogged that I couldn't get them clean with air and carb cleaner alone. Luckily I have quite a few spares. Also the needle and seats can dry out and become brittle, making float sealing problematic.

So I'd check for any vacuum leaks and probably throw a rebuild kit at the carb as well, just to ensure that everything is functioning as it should.
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Old Jun 1, 2005 | 09:02 AM
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ok il remove the rats net and change all theother hoses wont hurt any thing lol (canadian tire toled me just to use windshield washer hose is that ok?)
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Old Jun 1, 2005 | 10:21 AM
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Could be that your idle mixture is not set correctly, making it too lean or rich. Check the FSM for instructions on how to set it...
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Old Jun 1, 2005 | 10:27 AM
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Lightbulb missfire problem/stumbling

yeah that could be the problem cuz the car sit for 3 years. yeah it's a good idea to get the card. rebuilt. so that way the car can breathe easy. well best of luck fixing ur rx7 josh
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Old Jun 1, 2005 | 10:18 PM
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lol thanks for all your help
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