What can cause FC to run rich

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Jul 2, 2006 | 09:37 PM

ude_lose

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From: Milwaukee, WI

What can cause FC to run rich

My 87 RX7 is running rich and i was wondering if it could be the O2 sensor or what can be causing it to run rich....

Jul 2, 2006 | 09:47 PM

DragonRx7

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From: San Antonio

They were tuned to run rich from the factory.

How rich are you talking? and how do you know it is rich?

Jul 3, 2006 | 05:55 AM

bingoboy

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From: Kailua, HI

you need to give more info about 'rich' and why you think it is that way. also there are a ton of problems that will throw error codes that the factory ecu's response to is to run rich and desrtoy your milage.

Jul 3, 2006 | 09:47 AM

j9fd3s

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From: https://www2.mazda.com/en/100th/

i'll third the "how do you know its rich" bit, but it can be a bunch of stuff.

02 sensor, if you're looking at an a/f meter, a failed or removed acv will do it too...