Help! Throttle Body Problem Keeping My Car From Running!

[Booster-Shot]

Hey, I just bought a new throttle body for my car, and the valve or circle thing that lets air in is stuck open.

Its not fully open, but not fully shut either. I can still move the throttle to a more open position, but when I relax it, it will stay partially open.

How do I adjust this so it will stay closed in the relaxed position?

Thanks.

 

[romeen]

Did you recently remove the throttle plate from the shaft? If yes, you may not have gotten the plate centered properly when putting it back together.

If no, then check the throttle cable and throttle lever to make sure that they are not binding on anything. Also make sure that the spring which provides the tension to close the throttle plate is in the proper position.

Also, if you recently replaced the shaft seals did you remember to grease them properly where the shaft goes through?

 

[Booster-Shot]

Did you recently remove the throttle plate from the shaft? If yes, you may not have gotten the plate centered properly when putting it back together.

If no, then check the throttle cable and throttle lever to make sure that they are not binding on anything. Also make sure that the spring which provides the tension to close the throttle plate is in the proper position.

Also, if you recently replaced the shaft seals did you remember to grease them properly where the shaft goes through?

I actually just bought the throttle body online and this is the way it was packaged.

So, at least we can rule the throttle body cable out of the way. Im not sure how to check how everything is in proper position.

There is a black sensor on one side, it has two screws in it that give the throttle body circle plate a bit of movement. However, even at its furthest position it is still open. Is this sensor supposed to be able to move around with little effort, or do I need to tighten these down?

It just looks to me like someone didnt close it all the way when they were tightening it. On the other side, there is a bolt holding something that looks like a circle with the top and bottom cut off. The bolt looks to be going through the center of the throttle body circle. Can I take this nut off, move the bolt, and then put the nut back on?

 

[Booster-Shot]

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[romeen]

The black sensor is the Throttle Position Sensor. You need to adjust that and then tighten it down. Instructions for doing this can be seen here:

http://www.plymouthlaser.com/tps.htm

On the other side of the TB there should be the throttle lever which is what the throttle cable hooks onto. The "bolt with the top and bottom cut off" is the end of the throttle shaft. This shaft goes from one side of the TB to the other and is what the throttle plate attaches to via the 2 screws that you see when looking into the throat of the TB. It's possible that the previous owner may have replaced the shaft seals and not centered the plate properly when reassembling. Does it look like the plate is contacting the wall of the throttle opening and causing it to stick open? If yes you may need to remove the 2 screws and reposition the throttle plate. These instructions for replacing the shaft seals (a common source of a boost leak) will give you a better idea of what I am talking about.

http://www.plymouthlaser.com/tbor.htm

It may be a good idea to just go ahead and replace the shaft seals now while you have the TB off the car. You can purchase them here:

http://search.store.yahoo.com/cgi-bin/nsearch?query=shaft+seals&catalog=machv

 

[romeen]

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It's hard to be certain but in the first picture it looks as though the plate might be positioned to low. If you examine it you should be able to see the outline of the shaft where it was positioned for so many years. It looks like there might be an outline mark above the shaft in the picture but I am not positive. IF that is the case then you can remove the 2 screws, reposition the plate to where it was originally and put the screws back in being careful to keep the plate in positionwhen doing so. If you do this make sure to use loctite on the threads to keep the screws from possible backing out and getting sucked into the motor. Again refer to the link above for replacing shaft seals for more detailed instructions.

Here is one more link to help you in deciphering what is what.

http://www.ca.dsm.org/faq/tb-shaftseals.html

 

[bling5tatus]

oh, if you do happen to remove those screws holding the plate, please use loctite and install them back in there very well, if you suck a screw into your intake you're boned.