flashing cel - p0172 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 07-21-2008, 01:50 PM   #1
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Default flashing cel - p0172

After the car was tuned it ran pretty well. A couple weeks ago I got a CEL. Read it to be P0172 (running rich), P0102 (MAF) and P0420 (cat). It would come and clear itself within a few drive cycles. Car ran fine, though.

Finally it stayed on for quite a while so I read it and cleared it. It went away for a few more drive cycles and now the CEL returned and is flashing, but only showing P0172 (running rich) and P0300 (misfire).

Seems like I got alot of stuff going on. First I plan on loading a conservative timing map. That tends to eliminate the misfire code. So far the only code that I've been consistently getting is the rich code.

Where should I start? Clean the MAF; connections look good? Check the 02 sensors? The front one is about 20K miles old. I'm definately getting reduced mpg this tank. Other than that, the car still runs great.
Jesse H is offline   Reply With Quote

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