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Throttle body still stickey?


MadManMike
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When I first got my pathy about 3 months ago I noticed that the gas pedal would stick when stopping at a stop light or to start out with during the day. So I read on the forums to clean it with some air intake cleaner and a soft tooth brush.

 

The first time: I took off the air intake hose and started cleaning... it was very dirty.. tons of black junk came out while spraying and brushing. After a half of a can of air intake stuff and an hour of cleaning I thought I had it. A few days later it started to stick again.

 

Second Time: Went back in to try and clean it out again, this time I cleaned every thing even the back of the butterfly plate ( making sure I got it all)... worked great, a few days later it started to stick again.. even worse this time.

 

Third Time: Used the rest of the can of the cleaning fluid, used the old tooth brush again and a rag. Once again it was kind of dirty... I made sure this time to clean it out behind the plate as well .. got it to sparkle in there. worked fine for about 3 days and started to stick.. but not nearly as bad as before.

 

So now it sticks every once and a while.. at every 4rth or 5th stoplight.. seems to get worse as the vehicle warms up (might just be my imagination on that one).

 

I can't imagine that there is any gunk left in there, Is it possible while cleaning I made the butterfly plate off center or something? I am a total newb when it comes to air intakes.

Next I am going to try and remove the throttle cables and test it with out them and try and make it stick.

 

Any ideas?

-Mike

Edited by MadManMike
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unhook the throttle cable from the t.b. then i would open the butterflies and let it snap shut. Try to open it again, does it stick? If not than I would check out the throttle cable like 88 said. if the calbe is starting to fray it may bind up or it may just need a good lube.

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Or the pivot on the pedal could be sticking under the dash. You don't have your floormat squished up under the pedal, do you? I had that happen once on my friend's 5.0 Mustang...it would stick terribly until we pulled the floormat back. ;)

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I haven't seen this with PF's, but Civics have a bad problem with a bolt on the throttle cable catching on a protruding part from the engine. Try following the cable back. If there is a cable tensioner (haven't looked but I'm assuming...), it could be hitting somewhere.

Edited by kwilley
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Okay so I took the throttle cable off of the t/b and it still sticks...

 

So I am guessing it is the plate still sticking.

 

Any suggestions?

 

-Mike

Edited by MadManMike
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Short of dissassembling the butterfly completely. Maybe try to lube the butterfly shaft at the two entry points of the air intake. :shrug: Might be some gunk in there that's making it stick.

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I finally had to remove the upper intake, remove the TB and clean the whole thing, there was so much carbon in there, I took it to the machine shop and let them do it for $20. Looks to me like the EGR port lets all that carbon in there. Hasn't stuck since (3yrs ago)

Edited by Derrik
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Im having kind of the same problem... my throttle sticks but also seems to idle higher at times, Im thinking it maybe the IACV behind the plate :help: The best bet is most likely to remove the tb and clean it all out.

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Im gonna tear down the intake this weekend and clean it all out - I keep dying on the highway going 55, then the idle is all messed up... and im not really sure what it is.

Let me know how it goes.

I am a little afraid to take of my T/b... mostly afraid of dropping a screw down the air intake :P

 

So I just looked in there and tried to clean it some more but it still sticks... It only happens at about every 3rd stoplight. Not sure why....

 

So possible could the T/b plate be scraping in the t/b actually touching it? I do notice some small scrape marks at the bottom of the t/b ... might just be ware marks.

 

Any thing to worry about when taking it off? There looks to be a seal.. will that need to be replaced?

 

-Mike

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Any thing to worry about when taking it off? There looks to be a seal.. will that need to be replaced?

 

-Mike

If you don't destroy the seal when you remove it then you "can" reuse it.

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Well ill add, On my R50 the throttle cable/butterfly valve thingy would get caught up on a vacuum hose, I never noticed it until I started getting a big hiss from the engine bay, the cables tore right through it. So maybe something is in its way.

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