Fuel mileage loss, fix = clean the Map Sensor again.

This is definitely an easy maintenance action. It would be hard to believe that the sensor functions at maximum effectiveness while covered in soot. The sensor sits just downstream from where the EGR pipe enters the intake manifold. I haven't monitored mine before and after the EGR delete to see if the sensor stays cleaner longer. I can do some research and check when I cleaned it last. Then tomorrow I will inspect it and report the findings.


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According to google, this sensor is also the "Charged Air Temperature Sensor". If that is the case, a soot coated temp probe would react slower to temperature changes and cause improper fuel delivery. This could be some of the cause of the low power as well.


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justin13703 said:

Why are the o rings different colors? Did you replace them at some point?

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Same o rings. I guess the green coating came off of it.

I do not know of a recommended cleaner for the sensor. I know carburetor cleaner leaves a lubricant behind when it evaporates which isn't ideal. Brake cleaner works really well but can damage electronic components by removing insulation. Brake cleaners also attack certain plastics and rubber compounds.

I scraped off the big chunks and and wiped the rest off with a paper towel



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justin13703 said:

I actually just pulled that sensor and cleaned it. When it came out it looked identical to the pictures you posted bradherr. All 4 of those slots were almost plugged solid with soot. My car has just over 35,000 miles. I would definitely recommend that everyone pull and clean that thing at least every 30k. Unless you're deleted lol. The advantages of deleting these cars just keep piling up.

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Did the MAF cleaner work on it?



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