POTZ tb getting stuck at WOT...Advice

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Oct 21, 2014 | 10:33 AM

#21

gagliano7

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From: Monroe,NY

Check the cable while it is disconnected. It should move back and forth smooth. Have some one give you a hand. Disconnect it from the throttle body but leave it in the bracket and have someone push the pedal slowly than you pull it back. It should be smooth and easy.

Oct 21, 2014 | 12:01 PM

#22

Raoul-Duke

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From: South Chicago

Quote:

Originally Posted by LS1nut346

I'm sure it's tough to eyeball but it might be going past 90* open. You can put some RTV or something on the throttle stop to limit it a little (basically undo what he milled off) and see if it still does it. If it does, it's something else. You need to use the process of elimination.

Quote:

Originally Posted by gagliano7

That's a good idea that I haven't tried yet, I will check it out when I get home and report back tomorrow. However it only gets stuck about 25% of the time when I go 75%-100% throttle. That may not mean anything though. I would think this would get stuck every time I hit it but that may not be the case. I will give it a shot. Thanks.

Oct 21, 2014 | 01:00 PM

#23

demonspeed

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From: Pittsburgh, PA

Perhaps it may be prudent to install a set screw at the throttle stop just as it has for setting idle.

Oct 21, 2014 | 03:02 PM

#24

Raoul-Duke

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From: South Chicago

Quote:

Originally Posted by demonspeed

Perhaps it may be prudent to install a set screw at the throttle stop just as it has for setting idle.

I'm not sure how I would install it? Sorry that I am stupid

Could you show where in the pics that I supplied? You're speaking about the bump/throttle stop that was shaved off some?

Oct 21, 2014 | 03:56 PM

#25

demonspeed

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From: Pittsburgh, PA

Quote:

Originally Posted by Raoul-Duke

You're speaking about the bump/throttle stop that was shaved off some?

Yes. You'd need to drill/tap for it, but you'd then eliminate the concern of it opening beyond 90.

Oct 22, 2014 | 10:48 AM

#26

Raoul-Duke

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From: South Chicago

Quote:

Originally Posted by demonspeed

Yes. You'd need to drill/tap for it, but you'd then eliminate the concern of it opening beyond 90.

I disconnected the cable from the tb last night and had my brother slowly push down on the gas pedal until WOT a few times, while I held the cable end and kept tension, and it felt smooth. It definitely did not get stuck or snag or anything like that.

Can you confirm that if the blade is going past 90 degrees that it typically would be causing the throttle to get stuck?

Oct 22, 2014 | 06:51 PM

#27

Fry_

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From: Marengo, Ia

Maybe you could try putting a few layers of tape on the bump stop to make sure it can't go past 90* then see if you can get the throttle to stick. If it gets stuck you need to look for a different problem, if not then you need to look for a more permanent but similar solution.

Oct 23, 2014 | 12:37 PM

#28

Raoul-Duke

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From: South Chicago

Quote:

Originally Posted by Fry_

Yeah tape would be a good temporary fix so I can test it. What sucks is it is do damn rare and random when it happens. I drove it yesterday and got on it a lil and it was fine. It's supposed to be 70 here Saturday so I'm going to take it on a nice 50 mile cruise with the tape and see what happens. However, its so rare I could probably not use the tape and have no problems.

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Oct 23, 2014 | 01:04 PM

#29

inssanity21

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From: illinois

To me it looks like that blade is not centered... its probably getting hung up somewhere on the throttle body housing.

Oct 24, 2014 | 12:17 PM

#30

LS1nut346

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Honestly you should probably just throw it in the trash and get a new aftermarket one. I know it will be tough to do but you'll be kicking yourself for not doing it if you end up wrecking the car.

Oct 24, 2014 | 12:33 PM

#31

Raoul-Duke

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From: South Chicago

Quote:

Originally Posted by inssanity21

To me it looks like that blade is not centered... its probably getting hung up somewhere on the throttle body housing.

But I've moved the blade so many times back and forth, slow and fast, with the cable and by hand, and it has never done anything but be super smooth/perfect.

Quote:

Originally Posted by LS1nut346

Honestly you should probably just throw it in the trash and get a new aftermarket one. I know it will be tough to do but you'll be kicking yourself for not doing it if you end up wrecking the car.

I hear that, well I will be taping the throttle stop and going for a cruise tomorrow to see if I can replicate it getting stuck. I have driven the car for weeks though before without it happening. Then all of a sudden, it gets stuck.

In the end, the car is being stored this Winter as usual and if I cannot figure it out by Spring then I will get an aftermarket one when I cam it.

Oct 28, 2014 | 09:20 AM

#32

gagliano7

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From: Monroe,NY

Are you sure your gas pedal isn't getting stuck to the floor some how. Could be getting caught on something (floor mat)or the pedal pivot point is worn and binds up with a certain pressure. I could be wrong but I don't think its the TB.

Oct 28, 2014 | 10:23 AM

#33

98cherrySS

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Quote:

Originally Posted by inssanity21

To me it looks like that blade is not centered... its probably getting hung up somewhere on the throttle body housing.

This ^^^

I've see it happen on a ported throttle I was cleaning. See if it sticks when you pull outward or push inward on the throttle cam. I bet that blade is just slightly off center. It doesn't take much.