Cleaned the MAP sensor

[KLauber]

There is a short article in the latest Diesel Power about cleaning the MAP sensor of all the soot that the EGR dumps into the intake. SHocking! Anyway, it takes maybe 15 mins to take it off, clean it with CRC electronics cleaner with a soft tootbrush and reinstall (takes one tiny Torx screw to hold it on). I do believe the throttle response is improved. I have 75,000 miles on the truck.

Pictures of the cleaned sensor and where it attaches to the intake are shown:

 

[Cosmo]

I did mine too. Did you take any pics of how dirty yours was? I did, but I haven't uploaded them yet.

 

[KLauber]

I did mine too. Did you take any pics of how dirty yours was? I did, but I haven't uploaded them yet.

It was almost clogged. I forgot to photo it... .



Ken

 

[Cosmo]

Yep, mine was basically solid. Shocking doesn't quite cover it...

I'll be pulling my intake apart and cleaning things out (as well as removing my heater grid) and I'll take more pics of the aftermath of EGR.

 

[Chas]

KLAUBER
Thanks for the pics>
, Did my 09 with 76K today, It needed it.
TDR ROCKS.


CHAS RCSD

 

[KLauber]

Its what TDR is all about! Hell i stopped by Geno's Garage today and Brandon fixed my rattling shifter knob for NC!

Ken

 

[ejc252]

I cleaned mine yesterday. Wasn't too bad but definitely dirty.

 

[Alan Reagan]

With 28K on the clock, I pulled mine. It was coated heavily.



It looks like a thermistor in there. More like the old Intake Air Temperature sensor. Are they sure that is the MAP?

 

[Cosmo]

According to Alldata it's a combo IAT/MAP sensor.

I pulled my intake off and milled the grid heaters out and enlarged the port on the manifold to match, and there was a LOT of carbon all through it. I used 12 cans of throttle body cleaner on it.

 

[Jim W]

Warning when I cleaned my sensor 21,000 miles ago everything fell off. Be careful and make sure your emission equipment does not fall off.

Since then I have been trouble free and the intakes are cleaned along with the MAP sensor.

Jim W.

 

[OBayer]

Caught the article in Issue 73 this week. Pulled mine today at 56k and the openings were clogged about 99%.



How could this not be throwing codes ?

 

[Newt]

Does cleaning it do anything for MPG or whatever?

Newt

 

[OBayer]

Does cleaning it do anything for MPG or whatever?



Newt

Can't wait to get mine on the road tomorrow and see if there's a difference of some kind.



Sorry I didn't take a pic, if I recall right there were 4 small holes on the end and 4 around the barrel. I had only 1 hole on the barrel open. There was so much soot on the end it even had an odd sloped shape to it.



This truck had the O2 sensors, the wrap and turbo done around 25-30k. ECM updated around 38k, so wonder how much soot was done pre updates.



Think I will add this to routine maintenance maybe every fuel filter change.

 

[RDHamill]

is there any evidence that proves that the sooting on the sensor negatively effects the output reading to the computer ?

 

[Cosmo]

Can't wait to get mine on the road tomorrow and see if there's a difference of some kind.



Sorry I didn't take a pic, if I recall right there were 4 small holes on the end and 4 around the barrel. I had only 1 hole on the barrel open. There was so much soot on the end it even had an odd sloped shape to it.



This truck had the O2 sensors, the wrap and turbo done around 25-30k. ECM updated around 38k, so wonder how much soot was done pre updates.



Think I will add this to routine maintenance maybe every fuel filter change.

And then there are the dodge techs (one here iirc) who say carbon buildup is due to a mechanical problem with your truck. :lol: Yeah, right. It's caused by the EGR pulling sooty air and dumping it back through!

 

[KLauber]

is there any evidence that proves that the sooting on the sensor negatively effects the output reading to the computer ?

Probably impossible to measure, but it can't be good for the sensor.



Ken

 

[DBithell]

Caught the article in Issue 73 this week. Pulled mine today at 56k and the openings were clogged about 99%.

How could this not be throwing codes ?

no codes because- that might be J35? IMO a great deal of the flashes just up'ed the parameters to avoid the CELs. eg. if a parameter of 5 set off a CEL, lets change that parameter to 15.

Have cleaned that sensor a couple of times on my '08, 1st time couldn't even see light through the openings.

SIDENOTE: for better exhaust brake performance clean the stainless steel tube that runs from the back of exhaust manifold up to a sensor on passenger side, front of engine bay, top, near the radiator. there is a pinhole to that sensor that gets clogged too.

 

[DBithell]

According to Alldata it's a combo IAT/MAP sensor.



I pulled my intake off and milled the grid heaters out and enlarged the port on the manifold to match, and there was a LOT of carbon all through it. I used 12 cans of throttle body cleaner on it.

Makes one wonder what it looks like past the grid heater in the intake track? YIKES.

 

[Cosmo]

That's one of the problems gas cars are having with direct injection - they're sucking oil from crank vents back through the intake and there is no fuel to wash down the intake valves. I'd wager our trucks have issues with it too.

 

[Bill Stockard]

That's one of the problems gas cars are having with direct injection - they're sucking oil from crank vents back through the intake and there is no fuel to wash down the intake valves. I'd wager our trucks have issues with it too.

Yep, I'm wondering about that too. I owned a Ford F250 with a 6. 9L diesel that recirculated the crankcase vent into the intake. It was very oily in the intake manifold, and after I added a turbo, the oily crankcase vapor kept the turbo compressor wheel well oiled. :-laf



Bill