MAP Sensors and Throttle Body Cleaning

[DesertSHO]

Hey everyone, I've noticed recently that my SHO is consuming a bit more fuel than normal and acceleration isn't the best. I figured I'd try cleaning the throttle body and MAP sensors to start since they've never been cleaned before. I wanted to ask if anybody has any tips, tricks, do's, and dont's for getting this done. What spray to use, how to clean it, how to safely remove the parts and put them back, etc. Also, are there any other sensors I should clean in regard to this issue?

 

[toms89]

I think cleaning the throttle body would have a negligible effect on performance and would probably leave it alone unless your are having issues with idle speed or getting cels related to the throttle body. Use electronic parts or maf sensor cleaner to clean the map sensor when it is removed from the manifold.

Since our cars are direct injected, one likely issue may be carbon buildup on the back of the intake valves and inside the intake ports. Depending on the degree of buildup, fuel mileage, idle quality and performance may suffer. Much more involved process to clean though.

 

[DesertSHO]

I think cleaning the throttle body would have a negligible effect on performance and would probably leave it alone unless your are having issues with idle speed or getting cels related to the throttle body. Use electronic parts or maf sensor cleaner to clean the map sensor when it is removed from the manifold.

Since our cars are direct injected, one likely issue may be carbon buildup on the back of the intake valves and inside the intake ports. Depending on the degree of buildup, fuel mileage, idle quality and performance may suffer. Much more involved process to clean though.

I've read about cases where hesitant acceleration was fixed by cleaning the throttle body. But I'll start with the map sensors first and see where that takes me. What size torx screwdriver should I use to remove the MAP sensors?

 

[76FoMoCo]

If anything I would change the #1 O2's if you have more than 50K miles on them. This is the primary control of the air fuel ratio.

 

[robert francis]

I clean my throttle body sensor,, manifold sensor, and air intake sensor every 6 months, using "MAF Sensor" spray cleaner.

 

[Ta2dResqr]

Check out CRC Intake Valve and Turbo Cleaner

 

[SeanDev]

I've read about cases where hesitant acceleration was fixed by cleaning the throttle body. But I'll start with the map sensors first and see where that takes me. What size torx screwdriver should I use to remove the MAP sensors?

Some advice always disconnect the throttle body power before cleaning it. The butterfly has enough power to crunch fingers.

 

[Carlos J]

Hey everyone, I've noticed recently that my SHO is consuming a bit more fuel than normal and acceleration isn't the best. I figured I'd try cleaning the throttle body and MAP sensors to start since they've never been cleaned before. I wanted to ask if anybody has any tips, tricks, do's, and dont's for getting this done. What spray to use, how to clean it, how to safely remove the parts and put them back, etc. Also, are there any other sensors I should clean in regard to this issue?

Cleaning the throttle body is part of maintenance use the proper spray don't use brake cleaner as some butter flys have a coding on.
if fuel is your issue I would be looking at fuel injectors cleaning and also look at the fuel trims long and short with a scanner there are some little ones that will give you this information OBD II reader the MAP is very unlike not that it couldn't have a problem just very unlikely.

 

[SeanDev]

Another tip is remote start car, smell air coming out of hood while it's closed by windshield, if you smell fuel you most likely have a leaking fuel injector. I spent the weekend replacing all mine over one injector. It was causing one bank to go lean and the other to go rich. If you pull some plugs and they are carbon fouled, your injectors and O2 sensors will be all carbon fouled too. Replace everything at that point.

 

[DesertSHO]

I cleaned the throttle body and MAP sensors with their appropriate spray cleaners. So far, I've noticed an mpg improvement of around 3-4 mostly on the highway; mpg in the city hasn't improved much. The improvement is nothing significant but noteworthy considering it's an easy clean. Acceleration has definitely improved, however. I'm going to look into O2 sensors, injectors, and fuel trim next.

I also noticed a couple of things during the cleaning.

First, there appeared to be these scratch marks on the intake manifold right behind the throttle body. I'm not sure what could have caused that, I hope someone can elaborate.

Second, I noticed a black oily residue covering the bottom of the intake pipe as well as the first MAP sensor. I also did the BOV mod a while ago and noticed some oil on the BOV as well. Is this normal?

 

[SeanDev]

Without a catch can installed , oil is normal everywhere you see it. Oil outside of intake pipe, no that's not normal, and could be a spot for a boost leak and from picture I can't tell if it's shadow or you have residue under pipe on valve cover and if that's the case, ide replace that pipe ASAP. Inside intake pipe oil is normal, again without a catch can on Ecoboost engine, reason why you will get buildup on valves. The scratches , as a process engineer that looks like an imperfection from the cast process,foreign material or just a issue with mold, not enough that QT wouldn't pass it. Or possibly spotting from a carb spray at one point. I suggest and upgrade to EPP pipes and get a catch can, there reasonable, easy to maintain once installed. New plugs, O2s, reset KAM or leave battery disconnected during tune up, which should give enough time to drain everything and do a relearn. Hope this helps.

 

[DesertSHO]

Without a catch can installed , oil is normal everywhere you see it. Oil outside of intake pipe, no that's not normal, and could be a spot for a boost leak and from picture I can't tell if it's shadow or you have residue under pipe on valve cover and if that's the case, ide replace that pipe ASAP. Inside intake pipe oil is normal, again without a catch can on Ecoboost engine, reason why you will get buildup on valves. The scratches , as a process engineer that looks like an imperfection from the cast process,foreign material or just a issue with mold, not enough that QT wouldn't pass it. Or possibly spotting from a carb spray at one point. I suggest and upgrade to EPP pipes and get a catch can, there reasonable, easy to maintain once installed. New plugs, O2s, reset KAM or leave battery disconnected during tune up, which should give enough time to drain everything and do a relearn. Hope this helps.

Yeah that helps a lot, thank you. And yes, there is a residue under the intake pipe on the valve cover. What could be causing a boost leak in this scenario? Worn/cracked pipes?

Also, are these the pipes you mentioned? https://www.ecopowerparts.com/shop/index.php?main_page=product_info&cPath=1&products_id=167

 

[76FoMoCo]

The noise maker pipe is a know boost leak and the oil build up on the outside indicates this. replace it with the explorer pipe or the EPP noise maker delete. https://www.ecopowerparts.com/shop/index.php?main_page=product_info&products_id=11

 

[SeanDev]

Yeah that helps a lot, thank you. And yes, there is a residue under the intake pipe on the valve cover. What could be causing a boost leak in this scenario? Worn/cracked pipes?

Also, are these the pipes you mentioned? https://www.ecopowerparts.com/shop/index.php?main_page=product_info&cPath=1&products_id=167

Yes they are and are installed on mine, biggest trick is patience to make sure you have them all fitted and secured. When I did front turbo I removed intake to that turbo and made install of charge pipe/hose easier, plus as a bonus I found the intake to front loose. And glad I did the job, when I removed pipe from rear to intercooler, it was oily at a seam. These OEM pipes are just brittle junk, especially when you add power. Oily residue at intake, could be loose clamp or you have a crack in the plastic seam. Honest ide replace all charge pipes. Best of luck to ya.

 

[javon7065]

I clean my throttle body sensor,, manifold sensor, and air intake sensor every 6 months, using "MAF Sensor" spray cleaner.

Hi. Where are the throttlebody sensor and manifold sensor located?

 

[76FoMoCo]

Hi. Where are the throttlebody sensor and manifold sensor located?

One is on top of the intake and the other is just in front of the TB.

 

[javon7065]

One is on top of the intake and the other is just in front of the TB.

Would that be number nine and number two in this picture?

 

[76FoMoCo]

Yep

 

[javon7065]

Yep

Ok, another post had the sensor at #2 called a MAP sensor as well as the one at #9. Still getting used to all of these different acronyms. I just cleaned the sensor at #9 last night to see if it helps with the shuddering at idle for a few minutes at cold start and to help with mpgs.

 

[76FoMoCo]

Wen was the last time you did plugs? Gap at .028.