4.3 Throttle body

s10manic · #1 12-28-2007, 04:35 PM

i have a 96 s10 with the 4.3 V6 and the other day when i went to change the sparkplugs we took off the air intake and when i opened the butterfly valve i saw about a half an inch of hardened Black stuff... and i was wondering how to get it off..

Thanks

eborn · #2 12-29-2007, 12:05 AM

just spray some carb cleaner on a rag and wipe it out....its usually just carbon build up or dirt

MT-2500 · #3 12-29-2007, 12:07 PM

For the bad carboned up ones carb cleaner or TBI cleaner and a old tooth brush works good.
Just like brushing your teeth.
Soak it and scrub and brush and wipe it away.
Good Luck
MT

s10manic · #4 12-30-2007, 05:23 PM

ok but question.. would it hurt it if i was to stick a screwdriver up under it and pry it out?

blazee · #5 12-30-2007, 05:36 PM

Half an inch would be an extremely abnormal amount of build-up and would certainly cause a lot of driveability issues. Are you sure that you're not seeing the air deflector which is supposed to attached to the underside of the butterfly?

s10manic · #6 12-30-2007, 05:38 PM

well im still trying to figure this truck out.. so i didnt know there was an air deflector and if thats what it is than there is still build up on it

blazee · #7 12-30-2007, 05:45 PM

If it's just the deflector with a little carbon on it, then using the TB cleaner and toothbrush with it in place will be okay. If you are really see a large amount of carbon build up (enough to pry off with a screwdriver) I would recommend pulling the throttle body off and bench cleaning it to keep any large chunks from falling into the plenum.

s10manic · #8 12-30-2007, 05:46 PM

ok.. is there anyway of finding a diagram of the throttle body for my truck?

s10manic · #9 12-30-2007, 06:14 PM

I noticed on my throttle body that there is an air deflector is there really a need for it? if not is there a way i can take it off?

maxwedge · #10 12-30-2007, 06:49 PM

Since you did not post the year, ( chronic issue on all the forums) I assume it is a 96, no do not remove the deflector.

s10manic · #11 12-30-2007, 06:51 PM

it is an 96 but the reason ask is because one of the things that hold it on popped off what can i do about that?

old_master · #12 12-30-2007, 07:19 PM

It is held on with rivets, but, there is also a bleed hole that is supposed to be open.

There are several threads in the forum claiming that removing the deflector improves performance, don't believe them, it is there for a reason.

s10manic · #13 01-05-2008, 05:36 PM

i got a 96 s10 with the 4.3 Vortec and i was wondering why gm put an air deflector on the butterfly valve?

old_master · #14 01-05-2008, 08:32 PM

The main reason is to reduce throttle sensitivity so it's not so "jumpy" from a stop.

s10manic · #15 01-05-2008, 08:35 PM

so if you were to take if off is it gonna hurt the engine?

POST REPLY TO THIS THREAD