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Cadillac Tech Tips - How to fix it Discussion, How To Clean the Throttle Body in Item Specific Cadillac Discussion; SL1CK, I would like to nominate you for "Tech Tip Of The Month" Thanks a bunch for a very well ...
  1. #16
    Astronomer's Avatar
    Astronomer is offline Cadillac Owners Fanatic
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    Re: How To Clean the Throttle Body

    SL1CK,

    I would like to nominate you for "Tech Tip Of The Month" Thanks a bunch for a very well thought out and illustrated tip. Can I coax you into a post about changing spark plugs in a 2000 STS?

  2. #17
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
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    Re: How To Clean the Throttle Body

    I find my LT1 tends to get stickier in the winter months, primarily if I have the throttle body coolant bypassed.

    Cleaning helps a lot. I don't recommend the throttle body coolant bypass due to the sticking in the winter. It doesn't do much if anything at all anyway.

    Quote Originally Posted by David Jenison
    What a great tip. Like many others I had a sticky gas pedal. Just thought it was normal stuff. Such an easy fix. Many thanks.
    Dave,
    1997 concours

  3. #18
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    Re: How To Clean the Throttle Body

    Hey i just did mine...
    and my dads...
    and my moms (woah was hers hell!!!)
    took about 2 hours to do them all no biggie at all great wright up i used it the 1st time a mth back and figured i owed you some props so slick muchas gracias

  4. #19
    N0DIH's Avatar
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    Re: How To Clean the Throttle Body

    If you take a good monitor of your idle IAC counts before and after you will see the improvement.

    IAC counts around (I believe) 128 show no need to perform it, but anything outside of that, it is needed.

  5. #20
    SL1CK's Avatar
    SL1CK is offline Cadillac Owners Enthusiast
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    Re: How To Clean the Throttle Body

    Quote Originally Posted by Astronomer
    SL1CK,
    Can I coax you into a post about changing spark plugs in a 2000 STS?
    I seriously would if I had a 2000 STS

  6. #21
    N0DIH's Avatar
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    Re: How To Clean the Throttle Body

    On my LT1, I was able to add a oil separator into the crank case breather air line which should reduce the needs for this cleaning.

    http://web.camaross.com/forums/showthread.php?t=336407

    http://lt1tech.com/cgi-bin/ultimateb...c;f=6;t=003154

    I can't seem to find a good pic of it, but I will take one on mine. It looks stock, so if you are creative, you can add this to the NorthStar.

  7. #22
    IBRandog is offline Cadillac Owners Member
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    Re: How To Clean the Throttle Body

    This forum ROCKS!! Slick, you rule the rock! lol

    So, Im picking up a 92 Deville with 91,000 from Texas any day now. Approximately what percentage or these Devilles are having this problem and should I just plan on cleaning the TB right away? Before symptoms and all?

  8. #23
    SL1CK's Avatar
    SL1CK is offline Cadillac Owners Enthusiast
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    Re: How To Clean the Throttle Body

    Plan on doing it every 20K-30K or so.

    It would be really good if you did it asap.

  9. #24
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    Re: How To Clean the Throttle Body

    On the '92 (4.9), don't forget to rod out the two EGR tubes down in the TB. They will get carboned up.

  10. #25
    Clark in Aloha Land is offline Cadillac Owners Member
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    Re: How To Clean the Throttle Body

    This instruction works on a 1991 seville as well. It is a little easer to get too. Remove the air intake elbow and open the throttle. Alternate spray and swab the two ports untill clean. (A small swap about the size of a gun cleaner and you are in business.) The car now runns like it should and the gas millage is back where it should be. Thanks for the post.

  11. #26
    Cyberdan3 is offline Cadillac Owners Fanatic
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    Re: How To Clean the Throttle Body

    I know how to clean throttle bodies, but when I did mine, the car started kind of hard as usual, but then the throttle seemed to be sticking slightly. It wasnt doing that before. I used to work at a Cadillac dealer and was always told to just place a screwdriver inside to keep the blade open (obviousely dont pry on the metal). Anyone have this probelm also? Maybe I just have to go drive it to let it settle out.

  12. #27
    Ranger's Avatar
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    Re: How To Clean the Throttle Body

    If the throttle is sticking, do it again. Spary the pivot points good, clean the perimiter of the throttle blade.

  13. #28
    GailyBedight is offline Cadillac Owners Fanatic
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    Re: How To Clean the Throttle Body

    Went to clean the TB last night, (98 eldorado), and just for grins checked the service manual. Page 6-777 states "Do not use any solvent that contains methyl ethyl ketone, (MEK). This solvent may damage fuel system components."

    Sure enough, the spray carb and choke cleaner I had contained MEK. Purchased some Carb Choke & Throttle Body Cleaner which has xylene and acetone as solvents.

    Probably a good idea to use cleaners that are specifically for throttle bodys.

    "Ride, boldly, Ride" - James Caan - Eldorado

  14. #29
    Camuchi is offline Cadillac Owners Member
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    Re: How To Clean the Throttle Body

    Amen Brother- don't use old school carb cleaner on the throttle body. I think there is a coating on the blades that can be washed away with regular carburetor cleaner. Throttle body blades are different metal than an old quadrajet or holley blades. I am not sure why the coating is there even- Lubrication i think because a throttle body doesnt have the fuel flowing over it like a carbs blades do.
    Anyway don't panic if you did it with the old stuff just remember if you start having sticking issues in the future.
    Someody else might have better data on the coating and its purpose, i am going from memory and my stupid dial up precludes any kind of reasonable data search this century!
    Matt

  15. #30
    stevebuick23's Avatar
    stevebuick23 is offline Cadillac Owners Fanatic
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    Re: How To Clean the Throttle Body

    Did it and it made it better. What a pain in the ass compared to some of my other cars though.

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