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Clean your Intakes

Kevin zellweger

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Kevin zellweger Enthusiast

Kevin zellweger

Posted
Posted

Just cleaned my throttle body and intake, bought the BG stuff from my dealer. :devil: if you don't know you should clean it clean it! what a differance :chevy: i will definetly do this more often.

 

thanks for readin :D

seadoons Enthusiast

seadoons

Posted
Posted

I have no idea how to do this - can you get it done? At what mileage should you do it at? How is the truck driving differently now? Better throttle response? Thanks!

Machine Enthusiast

Machine

Posted
Posted

Hi -

 

Cleaning the throttle body is really simple. Loosen the hose clamp, remove the hose from the TB, spray the throttle body with throttle body cleaner (not carb cleaner), open the butterfly valve and spray both sides and around the opening. Use a lint free rag to wipe off the buildup in and around the TB, reassemble hose and tighten clamp. Done in 15 minutes

 

I had to do mine at 14K miles – my Escalade had a terrible, inconsistent idle (constantly fluctuation between 400 and 600 RPM). Now it idles at 550 RPM all day long.

 

Some folks opt to take the entire TB off to give it a real good cleaning. I wouldn’t do that unless you have a ton of miles and some real serious buildup.

 

You get a can of throttle body cleaner at any auto parts store. Just make sure it says that it’s safe for all TB surfaces. Costs about $3.00.

JayMan Enthusiast

JayMan

Posted
Posted

I have posted detailed instructions in the past on how to properly clean your TB and IAC. A search using JayMan for a filter, in All Forums, under Any Date, should uncover them.

 

If all you do is constant Interstate driving at 75 MPH, your TB/IAC will be fine for +50,000 miles. If you do stop-n-go town driving at -30 F, you had better do the procedure twice a year.

 

Here are some links:

 

http://www.gm-trucks.com/forums/index.php?...le+body+cleaner'>http://www.gm-trucks.com/forums/index.php?...le+body+cleaner'>http://www.gm-trucks.com/forums/index.php?...le+body+cleaner'>http://www.gm-trucks.com/forums/index.php?...le+body+cleaner

 

http://www.gm-trucks.com/forums/index.php?...le+body+cleaner

 

It helps to have the Helm shop manual in front of you. There are a lot of tricky details that can foul you up: for example, the IAC has a tiny o-ring that can be damaged and/or remain stuck in the IAC well, so when you put the IAC back in it isn't sealed and you have a vacuum leak and very erratic idle.

 

Remember that occaisional high-speed Interstate driving is needed to keep the plugs clean. Constant stop-n-go

 

Also, an erratic idle can be caused on some 1999-2001 trucks if you change the battery or switch grades of gasoline. You have to do the Idle Learn Procedure, which I have also posted detailed instructions for.

 

Hope this helps!

silverado4800 Enthusiast

silverado4800

Posted
Posted

yeah at about 55,000 miles i decided to take my TB off to clean it. The throttle sticking was really getting on my nerves.

 

I was not surprised to see it was built up very thick all over the back and in the intake manifold itself. Probably about 3/16 inch thick everywhere, no kidding. After making the throttle body spotless and cleaning the intake some i stuck it back on and yeah, what a difference. No sticking throttle and better response.

 

But now at 68,000 miles the throttle is starting to stick again, what the hell. That really ticks me off. Thats one thing i liked about the old TBI engines, the gas kept the throttle and whole intake real clean. Oh well i guess the power is worth it, lol.

gmcjoe Senior Enthusiast

gmcjoe

Posted
Posted
Hi -

 

Cleaning the throttle body is really simple. Loosen the hose clamp, remove the hose from the TB, spray the throttle body with throttle body cleaner (not carb cleaner), open the butterfly valve and spray both sides and around the opening. Use a lint free rag to wipe off the buildup in and around the TB, reassemble hose and tighten clamp. Done in 15 minutes

Yep :thumbs:

 

A very good idea every 40K or so, especially if you have a 99 or 00 truck

Kevin zellweger Enthusiast

Kevin zellweger

Posted
  • Author
Posted
What's the "BG stuff"? tell us what you did.

:thumbs: it was just what the dealer had "BG" is the brand name, good products. The truck drives much diiferently than before i had cleaned it. I "TESTED" it and it has much faster throttle response and increased fuel economy. I also had a vibration that during idle would shake about every 10seconds. I also cleaned the iac valve and the engine responds better when i start it. it was the first time i cleaned it (92000km) although i did not have 3/16of an inch in there it was quite dirty.

 

highly recommended :P

make sure after cleaning to do the idle learn procedure.

:P

Tucson_02Silverado Senior Enthusiast

Tucson_02Silverado

Posted
Posted

The cleaning shouldn't be needed for 2002+ as the EGR gasses are the majority of contaniments entering the intake plenunm right behind the throttle body. 2002+ do not have an EGR. Although I understand the Duramax is going to have one, that'll be a mess to clean up.

Machine Enthusiast

Machine

Posted
Posted
The cleaning shouldn't be needed for 2002+ as the EGR gasses are the majority of contaniments entering the intake plenunm right behind the throttle body. 2002+ do not have an EGR. Although I understand the Duramax is going to have one, that'll be a mess to clean up.

Hmmmm, my 02' TB was coked up pretty good before I cleaned it. Fixed the surging idle issue instantly.

bandera Enthusiast

bandera

Posted
Posted

Just wondering...... :thumbs: ........What would happen if you took the hose off where it goes into the TB and capped it on the TB and put some type filter on the end of the hose? That way all of the dirty vapors would not be going into the TB. A long time ago, most engines had the valve covers vented to atmosphere. I know this would defeat the emmissions regulations :P , but could always re-connect at inspection time. :P

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