HOW TO: TB Blade Removal

[4thgenoutlaw]

Quote: Originally Posted by Crew Cab Sonoma

it shouldnt have to relearn anything.
did you center the blade correctly in the bore?
is the linkage resting on the idle stop screw?
if not, the blade likely needs some adjustment.

Thanks for your response, yes and yes. When I get home from work I will check everything again.

Thanks again.

[T_WEST99]

i jsut did this mod today and i had the same problem idle high, i realized you have to plug those holes that the rivets came out of, bc i had an extra one from another intake i have and i just cut around the rivets to leave em in and i out that one in and it ran fine, so either put new rivets in the holes or aluminum weld or solder maybe

Quote: Originally Posted by 4thgenoutlaw

Thanks for your response, yes and yes. When I get home from work I will check everything again.

Thanks again.

[Merritt]

Quote: Originally Posted by T_WEST99

i jsut did this mod today and i had the same problem idle high, i realized you have to plug those holes that the rivets came out of, bc i had an extra one from another intake i have and i just cut around the rivets to leave em in and i out that one in and it ran fine, so either put new rivets in the holes or aluminum weld or solder maybe

We've been saying that the whole thread now.

[stepsideSdime]

can this be done to a 2000 2.2L

[Crew Cab Sonoma]

Quote: Originally Posted by stepsideSdime

can this be done to a 2000 2.2L

nope. this trick applies to 96-later 4.3's only.

[fistandauntilus]

i did this mod to my truck a couple of weeks ago, and i did notice the difference you guys were talking about. i want to install a posi rear end now lol!

[GTOhaas07]

Damn, I've been on this site for ten minutes and I'm already going to have to start modding another car lol. I got this thing so I wouldn't have to

[gchemist]

HACKSAW!!

[thisissublime]

so i did this today, truck ran great.... decided to go out and hammer on it for awhile and ended up blowing my fuel line off at the fuel filter below my drivers door. not sure why this happened, got it back together enough to limp it home then got some new clips and got it back together.... just wish i knew why it happened.

[LXtasy]

I did the same mod yesterday to my 98, but I also descreened the maf and opened up the stock air box also. i will say throttle response it there. But I am unsure on any power gains. I just wanted the quicker throttle response and I know it was because of the lip removed.

I also cut mine off with tin snips with no problems. Make a whole bunch of cuts from outside going towards the tb blade itself and than cut away all the tabs.

[ToasterO]

so i definitely only had a sawsall sittin around and used that but i dont have that little nipple on there so i could just hack it off. i also just left the rivets in there. im doing a marine intake and just figured that i might as well do the mod while i was at it!

[4.3sonoma26]

hey guys, i also did this mod today...took me twenty minutes also i have had my truck for a year now, it is a 96 sonoma 4.3. Throttle response is alot better, and the truck doesnt lag with the AC on anymore. I recommend this mod to everyone. Along with my cold air intake, and exhaust system I am definately happy I am also looking into a hypertech power programmer, a high flow cat, and possibly hedders or something, and I will be ordering my cragar soft 8's soon. If any of you have a performance chip, I would also appreciate it if you could let me know of any improvements at all
Sincerly
Nick

[01_STL_X]

OK guys I did this mod and put it all back together. I drill out the rivets and put in new bolts with red loctite. I maintained my idle of about 600 rpms at operating temp. Little bit better acceleration so not bad. My problem tho, is that I have a high wine coming from the TB. I put it all back together with a new gasket and I am getting this annoying wine that "makes me want to punch infants". Really high pitched! It will be there for about a minute then disappear for maybe 10 seconds at cruising speed, then it will come back. Anyone have any idea? ALso vacuum lines are good and solid. 01 4.3L auto

[Merritt]

It's probably just the air whistling, and if it is then the only way to fix it would probably be to put an OE blade back on it.

[Norkimo]

So I opened up my TB took a quick glance at the TB blade and to my surprise there was no restrictor to be found. And yes I have the correct engine/year for this. I'm also the first and only owner of this truck. So go figure.

1997 4.3L

[thisissublime]

i thought 98+ were the only years?

[Crew Cab Sonoma]

all 96-later should have them.

perhaps a previous owner modded,
or replaced the throttle blade on that 97?

[Crew Cab Sonoma]

Quote: Originally Posted by 01_STL_X

OK guys I did this mod and put it all back together. I drill out the rivets and put in new bolts with red loctite. I maintained my idle of about 600 rpms at operating temp. Little bit better acceleration so not bad. My problem tho, is that I have a high wine coming from the TB. I put it all back together with a new gasket and I am getting this annoying wine that "makes me want to punch infants". Really high pitched! It will be there for about a minute then disappear for maybe 10 seconds at cruising speed, then it will come back. Anyone have any idea? ALso vacuum lines are good and solid. 01 4.3L auto

might be the bolts you added causing this.

[01_STL_X]

Quote: Originally Posted by Crew Cab Sonoma

might be the bolts you added causing this.

Thanks for chimin in CCS. I have read your post and you seem like a very good source of info.

It is the only variable that has changed. I went and picked up a used throttle body assembly at the pick n pull for 10$. Gonna put it on and see if it changes. If the noise goes away I am going to take it back off and clean it up and just cut the flap off, not drill out the holes. Will keep yall updated.

Dillon

[Norkimo]

Quote: Originally Posted by Crew Cab Sonoma

all 96-later should have them.

perhaps a previous owner modded,
or replaced the throttle blade on that 97?

I'm the only owner. Got it brand new.

[02_Black_XBlazer]

Quote: Originally Posted by Norkimo

I'm the only owner. Got it brand new.

Weird. My '97 4.3 W motor had one.

[travy]

From the factory all of them have it.

[02_Black_XBlazer]

Quote: Originally Posted by travy

From the factory all of them have it.

That was my understanding as well...

[Norkimo]

Quote: Originally Posted by 02_Black_XBlazer

That was my understanding as well...

I'll take some pictures of it when I get back in town this Monday. No clue why it wouldn't be there. I was pretty perplexed.

[01_STL_X]

update tried differnt throttle body and still have this whine. Goy my buddy switches comin over to take a look at it tommorrow. Will see what he finds could be the culprit.

[bygbyrd]

Ill be doing this next weekend

[bygbyrd]

Quote: Originally Posted by bygbyrd

Ill be doing this next weekend

soooo....i got bored and its done. So far a notice quicker acceleration at lower throttle. A little bummed that the throttle body whistle is gone but i knew it would be before i did it. Very happy with thw outcome with so little work needed

[tretiak]

ill be doing this tomorrow.

[ToxicC]

so i went ahead and did it, i left my rivet gun at work so i left the holes open from drilling them out. Not a good idea. i would start my idle at 1200+ and it would fall at about 1k. and i would gain enough speed to hit about 50 55mph on the highway WITHOUT TOUCHING THE THROTTLE!! haha well i fixed it and now it all better, i like the response i get from it.


one more thing, does everyones blade have that nipple looking thing on it? mine is missing so i have a hole there as well just wondeing if i should plug it up as well.

[814_fye]

to gain power on the topend you would have to put a cold air intake on and a high flow MAF sensor and housing because these 2 parts restrict the airflow almost as much as the stock throttle blade but aftermarket throttle bodys build 8-15 more horsepower so this mod builds power as well and the better gas milage depends on how you drive

[travy]

You don't need a high flow MAF.

[bygbyrd]

Quote: Originally Posted by ToxicC

so i went ahead and did it, i left my rivet gun at work so i left the holes open from drilling them out. Not a good idea. i would start my idle at 1200+ and it would fall at about 1k. and i would gain enough speed to hit about 50 55mph on the highway WITHOUT TOUCHING THE THROTTLE!! haha well i fixed it and now it all better, i like the response i get from it.


one more thing, does everyones blade have that nipple looking thing on it? mine is missing so i have a hole there as well just wondeing if i should plug it up as well.

picture of said nipple?

[814_fye]

as far as you 4.3 liter not haveing the baffle it was either change to aftermarket blade already,gm also offered a high flow throttle body that may be the case here or the thin alum baffle ripped threw the rivets and fell in the plenium witch is possible i had it happen once they get loose the air will tear it off eventually.when it happened to mine it idled high and set codes p0507 and p01509 the baffel didn't make it into the cylinders thank god but did make me some work.

[ToxicC]

Quote: Originally Posted by bygbyrd

picture of said nipple?

post #59

[letsgoladodgers]

well i kind of got screwed. try to do this and used the wrong size. so now the tip of the torque screwdriver is embeded into the screw becuase it broke off. i dont know how to get it out. tried everything. Tired a magnet, tried to pop it out,. nothing any ideas?

[circa]

Is your TB off? If not...pull it and try whatever you can to get it out.
If you cant... drill it and find another screw :/

My bit got stuck in it somehow... and i had to pull the entire TB off. Didnt want to risk the bit coming out and droping into the engine.

[BuckyBoy02]

Has anyone had any trouble with the SES light coming on after the throttle plate mod? Or does the computer automatically learn the new air flow and adjust for it?

[travy]

Quote: Originally Posted by BuckyBoy02

Has anyone had any trouble with the SES light coming on after the throttle plate mod? Or does the computer automatically learn the new air flow and adjust for it?

I had it for about five minutes when I first ran my truck. After that I haven't had any SES lights sense.

[BuckyBoy02]

Thanks travy

[Brad92]

Just joined this site... I just did this mod on my 2002 GMC Sierra 4.3 and now the throttle sticks when the truck has been turned off for awhile and you turn the truck on and shift into reverse or drive. It sticks in the un- depressed position causing me to peel out on my first take off. I thought I might have tightened the torx bolts too tight, so I backed off on them and it still does it.

If I press the gas a few times before I start the truck it is good.

I just cut the lip off and left a little tiny lip, did not do anything with the rivets or nipple.

I love this mod, it is awesome, except for the sticking throttle.

Thanks,
Brad

[fastr68]

i dont have a 96+ but i work on them from time to time for ppl and never knew they had this diffuser on the TB valve but i have to say that i have read this entire thread... every post.. and it has been one of the most amusing technical threads of all time... even after 10 years of being a member of a billion automotive forums.

its a rainy crappy cold night here and i had nothing else to do., lol

good job =)

[LUVMY02CREW]

Quote: Originally Posted by Brad92

If I press the gas a few times before I start the truck it is good.

That sounds like maybe the whole throttle body needs cleaning and maybe lube the cable(if thats even possible?)

Quote: Originally Posted by Brad92

I just cut the lip off and left a little tiny lip, did not do anything with the rivets or nipple.

After I cut mine, I filed it smooth from outside edge towards the middle to give the lip a smooth edge...maybe a small piece got bent outwards when it was cut and is catching on the side walls of the TB

Hope this helps....

[pj5454302]

So today i did this mod and... WHAT A DIFFERANCE i stomp in it and james just takesmoff. It used to be that only on certin surfaces could i do a burnout but now... any surface and condidtion, its sweeeeeeeeeet. I totaly recomend this it is free and took me 10 min.

[Brad92]

It seems to have fixed itself. Haven't had any more problems. It does seem like it isn't as strong at higher speeds like 70+. Maybe it is just because the lower end is that much improved and the top end is in my head.

[pj5454302]

I think the coolest thing is when you rev it, the rpm's climb so fast sounds like a dragster.

[Brad92]

Alright, its doing it again. It only seems do to it when it is cold and raining from take off and I can kinda feel it when going at slow speeds. I guess I'll just make sure there are no burrs or anything and sand some more.

[Brad92]

I fixed it this time. I took it apart, cleaned the inside of the intake and tightened the torx bolts tight. I also adjusted the throttle linkage. I believe it was due to the carbon buildup causing the throttle blade to bind. It was very interesting when I was just driving along and my rpm's stuck at 3500. I had to put the truck in neutral with the parking brake on, pop the hood and manually close the throttle.

[Daveman2]

This thread is hilarious with the number of failures involved LOL, It's such an easy mod.

Undo the throttle hat with your hands, take out the torx screw, Take the blade out, grid off the lip, put it back. der.

[LeSabreUltra]

Well, I did mine almost a year and a half ago, and the truck and I are still happy with this free and easy mod.

Just a little advice and help for those who are thinking about this but are concerned with what they have read earlier in the thread about the possibility of the engine running lean in certain cylinders as a result of this mod...

I pull my spark plugs every year in the fall to check the overall running condition of my engine, and just recently pulled them. I didn't remember this thread or I would have snapped pictures. But the results were that all six spark plugs were a nice healthy color. NONE of the cylinders are running lean, and after a year and a half it would definitely show. I'm afraid the posts in here saying that this would cause some kind of engine damage are simply spreading misinformation. There is no possible harm that could come from doing this mod. In fact, if I have time I'll pull them again sometime soon and post pictures to end the whole 'debate'.

The short of it is to go ahead and cut away, you'll be happy, and so will your truck.
.
.
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[Brad92]

Quote: Originally Posted by Daveman2

This thread is hilarious with the number of failures involved LOL, It's such an easy mod.

Undo the throttle hat with your hands, take out the torx screw, Take the blade out, grid off the lip, put it back. der.

Yeah, I'm so stupid that I didn't didn't take the throttle blade out correctly, cut the piece off right and put it back in right. My bad. I guess my throttle blade just stuck from my own stupidity in not following the steps... OH wait, I did do it exactly how I was instructed and it still stuck due to some carbon buildup that I didn't see. Did you list cleaning the buildup out of the intake??? Didn't think so.

So hilarious