Register to remove these ads

How To Clean Your 04-08 Throttle Body and MAF Sensor

Discussion in 'Tech Info' started by zchpro, Dec 27, 2010.

  1. zchpro

    zchpro Full Access Member

    Posts:
    138
    Likes Received:
    0
    Joined:
    Nov 28, 2010
    Location:
    Chandler
    Well I was having trouble with a low idle and wanted to replace my tb because of it. Some members on the forum suggested otherwise and while it didn't help with my low idle I have heard it helping rough idles and codes involving the throttle body.

    *DISCLAIMER* This is what is necessary for tb cleaning on an 04-08 f150 model 5.4 3v. Other vehicles may differ but the idea is the same

    Here's what you will need for this project
    8mm socket
    10mm socket
    1 socket wrench
    1 can of throttle body cleaner ( I used CRC brand)
    1 Can of MAF sensor cleaner (CRC brand)
    t20 security screw bit
    paper towels
    1 old toothbrush (You can use other brushes just don't use ones with metal in them)
    optional- air compressor
    patience and spare time- about 40 minutes if you're good at this kind of thing

    Steps:
    1: Pop your hood and use the 8mm socket and wrench to loosen and remove the negative battery cable
    2.Next remove the 10mm socket holding on the tube for your air intake
    [​IMG]
    3. Remove Air filter, Air Filter Tray, and Air Filter housing by loosening the 4 bolts and the base of it with your 10mm socket and wrench
    [​IMG]
    [​IMG]
    4. On the side of the housing there are two connections. One is for the mass aif flow sensor or MAF and the other is some kind of tubing on the passenger side of the housing. Remove the MAF using the t20 security screws and by unclamping the electrical connectors. The tubing on the passenger side has a small green security latch that just needs to be push down in order to release the tubing.
    5. Your engine bay should look like this now
    [​IMG]
    6. Again using the 10mm socket and wrench loosen the four bolts that are holding your throttle body on. Also make sure to loosen the throttle body position sensor and Idle Air control connectors that are secured to the throttle body. Your removed throttle body should look like this
    [​IMG]
    Your engine bay should now look like this
    [​IMG]
    *NOTE* Place a clean rag over the opening that is exposed in your engine bay to avoid anything falling in. If you feel the your engine bay is a little dirty you can use an air compressor to blow out some of the dirt that has collected in some of the folds BUT MAKE SURE that while you're blowing the crap out that you hold the rag securely over the opening to avoid any dirt of foreign particles from entering the engine.
    7. Using your TB cleaner spray lightly inside the throttle body, making sure to move the valve back and forth to let the cleaning agent work. Now take your toothbrush and/or rag and clean out/off all of the sludge.
    *NOTE* make sure not to spray any of the cleaner into the electrical connections for the IAC or TBPS.
    When its clean the TB should look similar to this
    Top
    [​IMG]
    Bottom
    [​IMG]
    8. Although I have no pictures, cleaning the MAF is just as simple. Make sure it is disconnected while cleaning it and that you do NOT touch any of the wires as this will cause premature failure and you will have to purchase a new maf ($130+ for this truck)
    Following the directions I did 15 bursts of the MAF cleaner by CRC onto my MAF sensor. After that I took the air compressor and blew out the Sensor in order to ensure that it was dry (don't plug it in until it is completely dry as that can also cause failure)
    9. Install everything in the reverse order and start your vehicle. With mine it took a little extra cranking compared to usual on the first 2 starts so don't worry if yours does the same.
    10. Follow the owners manual procedure for helping your vehicle's computers to relearn how to operate. for f150's the steps are as follows
    a. Turn on your vehicle and allow to reach normal operating temperature
    b. let idle with radio and ac off for one minute
    c. while still idling turn ac on and let idle for one more minute.
    d. drive the vehicle at different speeds for a minimum of 10 miles in order to help the ECU and PCM relearn your driving habits.
     
  2. supercrewzn

    supercrewzn Full Access Member

    Posts:
    7,871
    Likes Received:
    0
    Joined:
    Dec 4, 2010
    Location:
    ...
    Nice writeup dude!!
     
  3. rrogers

    rrogers Supporting Member

    Age:
    38
    Posts:
    8,810
    Likes Received:
    0
    Joined:
    Nov 27, 2010
    Location:
    east tn
    real nice...good job
     
  4. supercrewzn

    supercrewzn Full Access Member

    Posts:
    7,871
    Likes Received:
    0
    Joined:
    Dec 4, 2010
    Location:
    ...
    I vote sticky!!
     
  5. davbell22602

    davbell22602 67-79 Ford Trucks #1

    Age:
    39
    Posts:
    505
    Likes Received:
    0
    Joined:
    Dec 23, 2010
    Location:
    Bunker Hill, WV
    Nice write up
     
  6. zchpro

    zchpro Full Access Member

    Posts:
    138
    Likes Received:
    0
    Joined:
    Nov 28, 2010
    Location:
    Chandler
    Thanks guys

    I wouldn't mind that
     
  7. yz85rider2002

    yz85rider2002 Lowered Life

    Posts:
    10,302
    Likes Received:
    13
    Joined:
    Nov 28, 2010
    Location:
    South Carolina
    good job man
     
  8. VanoFord

    VanoFord Banned

    Age:
    35
    Posts:
    6,925
    Likes Received:
    0
    Joined:
    Nov 29, 2010
    Location:
    In my own imaginary world, where. Respect for wome
    very nice write up.
     
  9. ak_cowboy

    ak_cowboy Penguin Hunter

    Age:
    30
    Posts:
    14,507
    Likes Received:
    116
    Joined:
    Nov 28, 2010
    Location:
    Alaska
    Nice writeup. Have you noticed a difference driving it?
     
  10. zchpro

    zchpro Full Access Member

    Posts:
    138
    Likes Received:
    0
    Joined:
    Nov 28, 2010
    Location:
    Chandler
    little bit touchier throttle but it could be my mind playing tricks on me.
    I had it "cleaned" a little bit before I did this by a lazy mechanic that I know. He decided we should do the run the truck and spray the cleaner through the intake and let it clean the TB method.
    But yeah it seems like its better in reaction time. I'll do a 0-60 run and see if it cut off any time
     

Share This Page