throttle pump Options

[rasta]

hi there guys,

When my celica is turned on from cold, the accelerator peddle seems to be blocked/stuck. I am not able to gentley press it. I have to push it hard with my foot and then the acceleration peddle becomes smooth.

Does anyone know what the problem could be? Is it a throttle pump?

[dgbldr]

hi there guys,

When my celica is turned on from cold, the accelerator peddle seems to be blocked/stuck. I am not able to gentley press it. I have to push it hard with my foot and then the acceleration peddle becomes smooth.

Does anyone know what the problem could be? Is it a throttle pump?

What's a throttle pump?

Something is sticking. Check the pedal and pivot, cable, throttle body, etc. Lubricate as necessary. If you have cruise control, make sure the cruise cable is free also.

[hurley97]

maybe if you mean throttle plate or throttle body...? then yes it could be that.

[alltracman78]

Check to make sure your cable isn't binding or caught anywhere, same goes for the arm the throttle is mounted to. Also make sure the throttle plate isn't gummed up.

What's a throttle pump?

A throttle pump is used on a carburetor, it pumps [in a single squirt] a bit of extra fuel into the throat [think if it as the area just past the throttle plate] when you push down the gas pedal. The harder you push, the more fuel it pumps, just like the harder you squeeze a squirt bottle the more fluid comes out.
It's used because otherwise when you opened the throttle plate really fast the engine would run really lean for a split second [the fuel coming out of the jets {like a fuel injector for a carburetor} can't react fast enough] and possibly die. This richens the mix long enough for the fuel coming out of the jets to catch up.


EFI cars don't have one [that I know of anyways].

[GriffGirl]

^ howdy stranger!

[DEATH]

9x out of 10 it's just the Throttle plate sticking to the walls of the TB due to gumming up over time - it's very common on our cars. A quick squirt of carb cleaner will fix it temporarily - a better way to fix it would be to use the Carb cleaner and a red rag and get it all nice and clean again.
The others above were correct and being more thorough than I but I've had this exact problem on several Celicas and it was always what I described.

[alltracman78]

^ howdy stranger!

Howdy?
Aren't you from the Northwest?

9x out of 10 it's just the Throttle plate sticking to the walls of the TB due to gumming up over time - it's very common on our cars. A quick squirt of carb cleaner will fix it temporarily - a better way to fix it would be to use the Carb cleaner and a red rag and get it all nice and clean again.
The others above were correct and being more thorough than I but I've had this exact problem on several Celicas and it was always what I described.

Actually that's impossible.
Toyota coated the inside of the throttle bodies with a special Teflon polymer that doesn't allow sludge and oil residue to stick.
Ok, I'm just bulls h i t t ing you, that's probably what it is.
I just like to cover all the bases [if I can].

[hurley97]

Oh Jeremy, you're retarded.

You remind me of someone I work with, it doesn't matter what he says but the way he delivers it makes everyone believe him or think twice about their counterpoint.

[DEATH]

LOL - For a second I was like "But I've had this problem on a few Celicas before..." then I was like Oh you *#%&er

[rasta]

hi there guys,

thanks for your input. Next question ......


how easy is the throttle to clean for a beginer? I have no experience with cars but an good with fixing bits and peices following instructions. I assume this is just a cleaning issue

If you can install a head unit and speakers from scratch from a technical view point, do you think someone could clean the throttle? Also I am able to fix bikes (regular bikes not motorbikes).

I assume you do not need to unscrew anything/ take parts apart as you would do with a major mechanical issues such as engine work, or clutches etc.

[DEATH]

Easy bro - do you have a pic of your engine bay? Things like CAI/SRI make this easier or harder so that's why I ask but it's maybe 2/10 hardness [Mainly cause I normally reserve 1/10 for things like changing tires and oil changes - realistically it's no harder than that tho].

This post has been edited by DEATH: Oct 28, 2008 - 2:59 PM

[stephen_lee]

Yeah, easiest way is to just take your intake off, open up your throttle by hand, spray the cleaner in there, wipe with the red rag, spray, wipe.. over and over until all the black you can see/reach is gone

[rasta]

Death,

is this it- check the links? Do i also need to buy the cleaning spray/lubrictaor as well?

i have taken pics of a couple of items

http://tinypic.com/view.php?pic=28lyihv&s=4

http://tinypic.com/view.php?pic=6ozh4h&s=4

http://tinypic.com/view.php?pic=2q2kft0&s=4

what do i do next?

[DEATH]

First pic is perfect. Remove the Tbolt clamp on the stock intake hose where it connects to the metal throttle body to the left. See the wheel looking thing on the front? It's connected by that cable to your foot pedal. Inside you will see it's also connected to a large flapper type valve - that flapper type valve is most liekly gummed up with carbon etc. Get your carb cleaner and spray it down real good and then wipe it clean with the shop towel. Repeat until everything you can reach easily is cleaned down to the metal and the flapper valve moves freely. Reinstall the intake hose and wait till tommorrow and see if that doesn't make your problem disappear.
BTW - You might have a slight starting problem due to that carb cleaner - don't worry it goes away quickly - that's normal. If you were to do the cleaning with the engine on you would see the engine tries to die when you spray the carb cleaner.
One last thing - make sure you get carb cleaner that says compatible with fuel injection systems [Not sure if they still make the old kind but just in case]

[rasta]

Death U R A Legend! Thanks

So just to check - it can be done by some one who is inexperienced, like myself? Its just a simple cleaninng job rite?

Also in the picture - Are we talking about point A? On the left hand side

[DEATH]

Yes - everything you will do will be from point A and to the left. The part you are intended to clean is immediately to the left attached on the inside to that big wheel on the front.
And yes - you can easily do it. Now go to the store and get you some EFI approved carb cleaner and a shop towel and get to work!

[rasta]

Hey,

I cleaned the throttle as you guys said, there wasnt much dirt in there at all, it virtually look brand new inside there. I cleaned it thorougly, saw a little black bits of oil but nothing major.

I also pumped the accelerator pump which opened the throttle and my friend stuck a screw driver with a cloth on to clean and also sprayed with the carb cleaner.

Thing is the accelerator still is a little sticky when the car starts from cold. Its not that much of a major issue, a quick push with my leg will unclog the stuff ness and its smooth again.


Is there anything else that I should be looking to clean?

[DEATH]

This is why the others were so thorough above - now follow their directions. Damn I would have been willing to bet it was that.
One thing you can do to isolate the cable as being the issue is to turn the throttle fully open by hand [The big wheel thing again] and have someone else hold it open while you go in the car and gently/slowly push in the pedal and let it out. If it feels notchy still there is something wrong with your cable. If not it's probably not the cable.
OH BTW - This should be done with the car off.

This post has been edited by DEATH: Oct 29, 2008 - 11:52 AM