Sticky Accelerator Pedal - How to clean throttle body

115

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

42,095

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.

1 out of 1 people think this is helpful.
115

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

1 out of 1 people think this is helpful.

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

1 out of 1 people think this is helpful.
115

Thanks! Any danger of backfiring thru theTB?

115

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!

4 out of 4 people think this is helpful.
10

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

1 out of 1 people think this is 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 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Astro

Looking for a Used Astro in your area?

CarGurus has 245 nationwide Astro listings starting at $1,815.

ZIP:

Search Chevrolet Astro Questions

Chevrolet Astro Experts

#1 celica_gt_pimp
celica_gt_pimp
Reputation 320
#1 Tom Demyan
Tom Demyan
Reputation 320
#3 John Saffrahn
John Saffrahn
Reputation 280
View All

Related Models For Sale

Used Chevrolet Astro Cargo Van
137 listings starting at $4,995
Used GMC Safari
106 listings starting at $2,995
Used Chevrolet Express
75 Great Deals out of 5,832 listings starting at $2,288
Used Chevrolet Express Cargo
67 Great Deals out of 14,156 listings starting at $1,900
Used Chevrolet Silverado 1500
2,050 Great Deals out of 160,062 listings starting at $999
Used GMC Savana
8 Great Deals out of 1,592 listings starting at $3,000
Used Chevrolet Camaro
142 Great Deals out of 35,643 listings starting at $1,995
Used Chevrolet Tahoe
634 Great Deals out of 27,862 listings starting at $600
Used Chevrolet Suburban
397 Great Deals out of 18,733 listings starting at $2,000
Used Chevrolet Avalanche
187 Great Deals out of 5,295 listings starting at $2,200
Used Toyota Sienna
225 Great Deals out of 28,902 listings starting at $1,995
Used Honda Odyssey
273 Great Deals out of 28,206 listings starting at $1,295
Used Ford E-Series Cargo
74 Great Deals out of 3,129 listings starting at $995
Used Chevrolet Chevy Van
51 listings starting at $1,895
Used Ford F-150
2,425 Great Deals out of 210,996 listings starting at $895