Sticky Accelerator Pedal - How to clean throttle body

125

Asked by Oct 31, 2007 at 10:29 AM about the Chevrolet Astro

Question type: Maintenance & Repair

I have a Sticky Accelerator Pedal due to a sludged up throttle body. I can tell because it only sticks in the idle position (when in air intake valve is closed). I purchased some Valvoline throttle Body cleaner, but man, that assembly is way under the hood and hard to reach. I don't want to take it off unless I have to. Also, I don't want the sludge to go down into the engine, if I clean it while in place... Has anybody done this before? It happens on the 4.3L & other throttle body engines a lot, due to the PCV valve routing gases into the air intake, and results in the pedal sticking, making the van lurch forward when it finally unsticks under pressure.

7 Answers

45,575

Have a dealership do the "Wynn's Fuel Induction Cleaning Service," or similar. It's pretty neat in that they use a special machine to actually run your vehicle off the throttle body cleaner for about an hour or so. The Dodge dealer where I worked offered it and it did a huge difference on vehicles like you are talking about for around $120. Much better than any throttle body cleaner you will spray in yourself. Alternately you can use GM Top End Engine cleaner mixed in with the next few gas tanks and it should clean it up a bit.

2 of 2 people found this helpful.
125

Sounds good littlehorn, thanks. To save $, I'm leaning toward removal and wondering if I will have to replace the gasket...

1 of 1 people found this helpful.

unhook hose on t-body and use a can of carb cleaner have it running and spray while throtleing.

1 of 1 people found this helpful.
125

Thanks! Any danger of backfiring thru theTB?

125

Well, I finally broke down and took off the throttle body (TB)- actually, it was really easy (there is a plastic wingnut at the back of the air cleaner hosing intake on top of the TB; its one of three bolts holding the TB on to the manifold and takes a 7/32 socket). Boy am I glad I took it off! There is absolutely no way I could have given it the cleaning it needed, otherwise. It took quite a lot of tooth brushing with a whole can Valvoline TB Cleaner to remove all the caked on gunk, but afterwards, not only did the accelerator not stick, I gained a lot in MPG & smoothness! I just added a can of B&G'S 44K injector cleaner, and it's a brand new van. J recommend removal & full cleaning -it's a snap!

5 of 5 people found this helpful.
10

That sounds like a good idea! I have the same symptoms,

1 of 1 people found this helpful.
10

I an now having the same thing... THere is a GM bulitin about it. It gets the code P0121. I have a 2007 Tahoe and this is a regular thing I guess.

1 of 1 people found this helpful.

Your Answer

Astro

Looking for a Used Astro in your area?

CarGurus has 208 nationwide Astro listings starting at $1,495.

ZIP:

Chevrolet Astro Experts

  • #1
    celica_gt_pimp
    Reputation
    340
  • #2
    Tom Demyan
    Reputation
    320
  • #3
    John Saffrahn
    Reputation
    290
View All

Related Models For Sale

Used Chevrolet Astro Cargo Van
128 listings starting at $1,995
Used GMC Safari
106 listings
Used Chevrolet Express
81 Great Deals out of 5,424 listings starting at $3,500
Used Chevrolet Express Cargo
47 Great Deals out of 11,530 listings starting at $2,500
Used Chevrolet Tahoe
783 Great Deals out of 41,561 listings starting at $1,987
Used GMC Savana
4 Great Deals out of 1,107 listings starting at $6,000
Used Chevrolet Suburban
474 Great Deals out of 23,982 listings starting at $1,799
Used Chevrolet Silverado 1500
2,560 Great Deals out of 173,274 listings starting at $1,000
Used Toyota Tacoma
653 Great Deals out of 45,099 listings starting at $2,500
Used Chevrolet Camaro
437 Great Deals out of 31,256 listings starting at $1,450
Used Ford F-150
3,132 Great Deals out of 219,096 listings starting at $1,200
Used Chevrolet Colorado
337 Great Deals out of 37,331 listings starting at $1,995
Used Ford E-Series Cargo
67 Great Deals out of 3,267 listings starting at $2,995
Used Toyota Sienna
493 Great Deals out of 23,585 listings starting at $999
Used Ford Transit Connect
69 Great Deals out of 11,389 listings starting at $3,799

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.