GM L5P TMAP (Temperature & Manifold Absolute Pressure) sensor soot condition after 32,500 miles with S&B spacer

[wwillson]

This is my post about the condition of the TMAP sensor after 17,500 miles when I cleaned the TMAP sensor and installed the S&B spacer:

https://bobistheoilguy.com/forums/t...h-soot-at-17-500-miles-s-b-map-spacer.355240/

Today I pulled the TMAP sensor after 32,500 miles of use with the S&B spacer, almost twice as many miles with the spacer than without. I was amazed how little soot was on the sensor with the S&B spacer installed. Why does the aftermarket have to solve problems like this when GM easily could have simply cast a spacer into the intake horn? My opinion is the spacer is absolutely a necessity.

TMAP spacer run for 17,500 miles without spacer installed:

TMAP spacer after 32,500 miles with spacer installed:

 

[BobsArmory]

I will have to look and see if they have a spacer for the baby duramax.

 

[bdcardinal]

Its nice when the aftermarket comes up with a solution that does something good like this. I sell a lot of the MAPs on the 6.7 trucks for the same reason.

 

[wwillson]

I will have to look and see if they have a spacer for the baby duramax.

You don't need one. The low pressure EGR in the 3.0L uses post DPF exhaust, so you don't get soot in the intake.

 

[I<3oil]

Jesus

 

[Jetronic]

The one in my Alfa looked even cleaner (though wet with oil) after 40k+ miles. There was one piece of soot on it that I could just blow off.

I never touched that sensor after that.

 

[wwillson]

An update. When I cleaned the TMAP sensor at 32k miles I forgot you aren't supposed to get any MAP cleaner spray in the vent hole in the sensor. I sprayed it out real good and the sensor failed about 1,000 miles later. Not a big deal as I carry a new TMAP sensor in the glove box. Moral of the story, don't get any cleaner in the pressure vent hole.