93 runs extremely rich

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03-17-2008, 12:06 PM

Mazda Mainiac

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Join Date: Mar 2008

Posts: 2

Hi all, I just got this 93 RX7, got all of the cooloing system repaired, but now it runs extremely rich and won't clear out and of course now it won't start. I put in new plugs and it started right away and immediatly went to rich and won't clear out. Any Ideas. Oh no check engine light.

BTW, I looked for this same topic till I couln't see straight so I'm posting it, hope some one can help. Thanks

03-17-2008, 12:20 PM

Sukai94

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Join Date: Sep 2006

Location: San Diego

Posts: 274

Check your O2 sensor

03-17-2008, 12:50 PM

Mazda Mainiac

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Join Date: Mar 2008

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Quote:

Originally Posted by Sukai94' post='896682' date='Mar 17 2008, 09:20 AM

Check your O2 sensor

Thanks, will do!

03-17-2008, 06:23 PM

Sukai94

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Join Date: Sep 2006

Location: San Diego

Posts: 274

O2 sensor replacement can often help with 3k hesitation too. Let is know if it works.

03-29-2008, 09:57 PM

dudemaaanownsanrx7

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Join Date: Mar 2008

Posts: 76

Even with the o2 sensor going out the car generally wont be rich enough to foul the plugs. Are you running the stock ecu? You might also check the MAP sensor, which is mounted on the drivers side firewall and has a vaccum hose attached to it...or should. Other reasons of running rich could be a stuck or leaking injector.