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dabaron
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Joined: June 21, 2018
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Location: Philly, mang
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 Posted: Wed Nov 06, 2019 3:06 pm Post subject: GoWesty Throttle Body with automatic weirdness |
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i replaced my well worn throttle body with a GoWesty model. the idle has improved considerably and the movement of the arm is smooth and easy, but...
i'm noticing that the arm does not always close fully when i remove my foot from the accelerator pedal. if i mash it and let it spring up quickly, no issue. if i just take my foot off at a mid-pedal range, the throttle does not close... not a great feeling when pulling up to a stop sign! i can left up on the pedal with my foot to close the throttle so that tells me it's not closing fully.
i've tightened the return spring by moving it to the end of the plenum "flange" and that does not seem to help. has anyone noticed this sort of issue with the GW TB?
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1991 Vanagon GL Camper
i had no idea i wanted to be a mechanic |
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dschaftlein
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Joined: October 11, 2016
Posts: 106
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| Posted: Wed Nov 06, 2019 3:15 pm Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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| I’ve had the same or similar problem with mine. I also had to adjust the switch from the factory setting as it wouldn’t consistently close. Adjusting the switch is also a pain, the whole throttle body needs to be removed |
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mikemtnbike
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Joined: March 26, 2015
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Location: North Carolina
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| Posted: Wed Nov 06, 2019 3:20 pm Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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I have not had any issues at all the gw tb has been proof against even this fool...but I did proactively re bend the spring to make it shorter pretty sure it said in the directions might be necessary to do so.
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1991 Vanagon GL 2.1 AT Westfauxlia. "Frankie" Totaled  https://www.thesamba.com/vw/forum/viewtopic.php?t=764510&highlight=carnage
1995 Eurovan Camper "Marzivan"
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djkeev
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Joined: September 30, 2007
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dabaron
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Joined: June 21, 2018
Posts: 2698
Location: Philly, mang
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| Posted: Wed Nov 06, 2019 3:28 pm Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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I have shortened the factory spring by 3/4" with no change. Zero issues with the factory TB returning to zero. It's almost as if there is a dead zone at the "past center" arc of the arm.
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1991 Vanagon GL Camper
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Igeo
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MarkWard
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Joined: February 09, 2005
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Location: Retired South Florida
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| Posted: Wed Nov 06, 2019 4:52 pm Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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| I’d be looking at the relay lever on the automatic as well as the cable that runs between the automatic and accel pedal. Something else could be dragging. |
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dabaron
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Joined: June 21, 2018
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Location: Philly, mang
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| Posted: Wed Nov 06, 2019 6:20 pm Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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| MarkWard wrote: |
| I’d be looking at the relay lever on the automatic as well as the cable that runs between the automatic and accel pedal. Something else could be dragging. |
could this be the case when there are no issues with the factory TB?
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1991 Vanagon GL Camper
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MarkWard
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Joined: February 09, 2005
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| Posted: Wed Nov 06, 2019 6:40 pm Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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| Yes. It’s a bit convoluted in design compared to a standard trans setup. |
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dabaron
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Joined: June 21, 2018
Posts: 2698
Location: Philly, mang
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| Posted: Wed Nov 06, 2019 6:43 pm Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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| MarkWard wrote: |
| Yes. It’s a bit convoluted in design compared to a standard trans setup. |
i was just under there, nada, nothing is keeping the rod from moving freely. i connect it to the TB and the movement becomes sluggish on the return of the arm when there is a light pedal release, like when letting off the pedal ahead of a stop sign.
maybe a more resistant spring is in order? too much of bending of the long spring arm and it restricts the WOT movement. stupid automatic.
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MarkWard
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| Posted: Wed Nov 06, 2019 6:56 pm Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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| A heavier spring would probably be fine. My guess is the rod is not square to the bushing in the throttle shaft arm causing it to bind. Over time it will probably wear in. I assume the throttle plate works fine without the trans rod connected? You might be able to tweak the rod to improve the angle. |
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dabaron
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Location: Philly, mang
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| Posted: Wed Nov 06, 2019 7:32 pm Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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| MarkWard wrote: |
| A heavier spring would probably be fine. My guess is the rod is not square to the bushing in the throttle shaft arm causing it to bind. Over time it will probably wear in. I assume the throttle plate works fine without the trans rod connected? You might be able to tweak the rod to improve the angle. |
yeah, the action is fine without the resistance of the arm. i'll see what i can come up with. other than that, holy crap this makes the response super lively. 1.5 hp gain, easy 
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djkeev
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mikemtnbike
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| Posted: Thu Nov 07, 2019 5:36 am Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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I'm sure you've probably done this, but I'd be futzing with the other adjustment points, just slight changes make a big difference. Maybe even try shooting some lubricant into the housing on the accelerator cable, not going to hurt, might help.
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1991 Vanagon GL 2.1 AT Westfauxlia. "Frankie" Totaled https://www.thesamba.com/vw/forum/viewtopic.php?t=764510&highlight=carnage
1995 Eurovan Camper "Marzivan"
2020 GTI SE manual |
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dabaron
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Location: Philly, mang
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| Posted: Thu Nov 07, 2019 6:02 am Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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| djkeev wrote: |
Can you post a good photo or 2 or 3 of the throttle body installed and hooked up?
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There is a clear rubber or plastic grommet in the spring hole on the throttle arm, I'm going to remove that and see if that helps. I also have a stronger spring i'll see if i can make work.
I'll try to get some photos this evening, if it's not raining.
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Igeo
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Joined: September 25, 2018
Posts: 897
Location: Oakland, CA
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| Posted: Thu Nov 07, 2019 7:20 am Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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Maybe temperature affects how smoothly the throttle opens and closes. One thing you could try in order eliminate other linkage parts would be to heat your oven to 180-200 degrees or so and let it soak in there for a bit and then see how it feels when its hot. You could also put it in the freezer. If it is binding at temperature extremes, then send it back to them.
Who makes these throttle bodies? If you look at the TB that the Buslab sells, it looks like the same part.
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dabaron
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Location: Philly, mang
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| Posted: Thu Nov 07, 2019 7:31 am Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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| Igeo wrote: |
Maybe temperature affects how smoothly the throttle opens and closes. One thing you could try in order eliminate other linkage parts would be to heat your oven to 180-200 degrees or so and let it soak in there for a bit and then see how it feels when its hot. You could also put it in the freezer. If it is binding at temperature extremes, then send it back to them.
Who makes these throttle bodies? If you look at the TB that the Buslab sells, it looks like the same part. |
GoWesty makes the part. there is no binding with the automatic throttle linkage disconnected. it appears to me the factory spring is not strong enough to pull the arm the last bit to close the TPS... i'll switch out to a stronger spring from the rear drum brakes and see how that does.
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Jake de Villiers
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| Posted: Thu Nov 07, 2019 8:58 am Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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| dabaron wrote: |
GoWesty makes the part. |
No they don't. GoWesty doesn't make parts. They may design parts and market parts and sell parts - but they are not fabricators! 
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dabaron
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Location: Philly, mang
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| Posted: Thu Nov 07, 2019 10:08 am Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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| Jake de Villiers wrote: |
| dabaron wrote: |
GoWesty makes the part. |
No they don't. GoWesty doesn't make parts. They may design parts and market parts and sell parts - but they are not fabricators! |
GoWesty contracted the manufacture of the product, better?
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Igeo
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Location: Oakland, CA
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| Posted: Thu Nov 07, 2019 10:29 am Post subject: Re: GoWesty Throttle Body with automatic weirdness |
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Here is an idea posted by member Tencentlife in the thread I posted above that is about the same issue you are experiencing.
"There's an easy mod that improves throttle closure and makes spring tension lighter as the throttle opens. Make a stout wire loop, or use a hose clamp, around the top of the PCV tower, and move the return spring anchor point there. That moves the direction of pull more CCW at idle, so there is more pulling tension at closed throttle, then as throttle is opened, spring tension is progressively less, so less effort to hold the pedal down at cruising rpms."
Also- Slimvest's van is a manual.
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