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Reading codes 13 and 32 smelles of gas 1992 gmc sierra 1500 k-model 350ci

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13 is an O2 sensor circuit issue, 32 is the EGR-OBDI is not as precise as OBD!! but you should see if your egr is hooked up, or if there is a blown fuse for it-the O2 sensor might just be due for replacement, you could try to clean the codes first (disconnect the neg cable for 10 minutes) to see if they come back right away.

While you are checking things, make sure the fuel pressure regulator is not leaking or has gas in the vacuum hose that connects to it.

Posted on Apr 02, 2011

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Check fuel pressure regulator

Posted on Apr 02, 2011


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