Expert: Mike Evans - 3/8/2010

Question
i have a 1994 chevy s10 blazer with a 4.3 vortec vin w. it has a service engine light on, so i ran a scan and it came up with a code 23- manifold air temperature sensor. well that was easy enough but.. when i went to the two local parts store webpages and looked up that vehicle they did not list that part. is there another name for it ie: air charge sensor, or is it actually the intake temp sensor that is located in the intake tube? not sure which sensor i am supposed to get. also would this sensor cause a slight rough idle?

Answer
    It's generally called an air charge temperature sensor in GM vehicles.  They all use the same one.  Standard Motor Parts uses the number AX32, I'll include a picture.  Neither of these local parts stores sound like they know what they're doing, however.  You might want to find an independent parts store, instead of a chain store, and a guy with a little gray in his hair.