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Slimvest Samba Member
Joined: March 20, 2014 Posts: 431 Location: Portland, OR
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Posted: Sun Sep 17, 2017 8:27 am Post subject: Re: Throttle body replacement recommendation. |
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Installed the new GoWesty TB last night. Wow, what a difference in throttle response! I love upgrades that make notable driving improvements. Replacing a 30 yr old component, the bar was obviously low though.
Everything went together easily, quality looks good from what I can tell. Two items I would change:
- No dust cover on their TPS. Switch is exposed and wonder if dust/debris will be an issue over time
- TPS connector does not mount like the stock unit to the intake tube. I pulled the L bracket of the old TB and was able to press the plug into it for mounting. _________________ '87 GL w/ Reimo top |
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Tark_CA Samba Member
Joined: May 18, 2017 Posts: 4 Location: Pittsburgh, PA
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Posted: Sun Sep 17, 2017 9:30 pm Post subject: Re: Throttle body replacement recommendation. |
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Slimvest wrote: |
Installed the new GoWesty TB last night. Wow, what a difference in throttle response! I love upgrades that make notable driving improvements. Replacing a 30 yr old component, the bar was obviously low though.
Everything went together easily, quality looks good from what I can tell. Two items I would change:
- No dust cover on their TPS. Switch is exposed and wonder if dust/debris will be an issue over time
- TPS connector does not mount like the stock unit to the intake tube. I pulled the L bracket of the old TB and was able to press the plug into it for mounting. |
This thread was exactly what I was looking for, as my '85 is having some serious idling issues. After trying to decide to change the TPS or TB out to what GoWesty has available, I think I'm going to go with the new TB from them. Any chance you could post a photo or two of the issues you mentioned? Just curious about mounting issue. Thanks! |
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Steve M. Samba Member
Joined: July 30, 2013 Posts: 6798 Location: Fort Lauderdale, Fl.
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Posted: Sun Sep 17, 2017 9:42 pm Post subject: Re: Throttle body replacement recommendation. |
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https://www.thesamba.com/vw/forum/viewtopic.php?t=662485
Still driving it! _________________ This free advice is worth exactly what you paid for it.
There are seven days in a week. Someday is not one of them. |
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airsweden Samba Member
Joined: June 17, 2011 Posts: 119 Location: Honolulu
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Posted: Sun Sep 17, 2017 11:54 pm Post subject: Re: Throttle body replacement recommendation. |
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Holy moly, i've switched every bit of engine management hardware on this van of mine chasing a crazy high idle. I parked next to a pal's perfect running 2.1 and swapped out ecu, air flow meter, idle control valve, idle control relay, etc... no change to my idle whatsoever. The only thing I had not tried was the throttle body so this week I got one of GoWesty's brand new ones and a new gasket, not even that helped.
I've been trying to check for vacuum leaks with propane all along but never got a lead anywhere. The other day I started squirting water on stuff while it was running and whenever I squirt around the the junction of the throttle body and the plenum... bingo the engine bogs. I took the plenum off to inspect for cracks, bends, rust, etc but it looks perfect. The throttle body looks perfect too as well as the gasket. When I put it back together, I used silicone on the gasket too but the engine still has an erratic 2k idle and still bogs when I squirt water there.
So, has anybody ever seen this? I thought maybe the seam on the manifold was leaking but it really looks like the interface with the throttle body to me when I squirt it. What do you gotta do to get a good seal there? _________________ 1982 1.6 NA Diesel Westy
1982 AHU MTDi CHC
1984 1.9 WBX Westy
1985 1.9 WBX Westy
1986 2.1 WBX Syncro Westy |
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Slimvest Samba Member
Joined: March 20, 2014 Posts: 431 Location: Portland, OR
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Posted: Mon Sep 18, 2017 10:02 am Post subject: Re: Throttle body replacement recommendation. |
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Tark_CA wrote: |
Any chance you could post a photo or two of the issues you mentioned? Just curious about mounting issue. Thanks! |
Had to rotate the harness plug 90deg to fit into the original mounting bracket. It's wedged in there pretty tight, so I'm not too worried about it shaking loose.
_________________ '87 GL w/ Reimo top |
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Slimvest Samba Member
Joined: March 20, 2014 Posts: 431 Location: Portland, OR
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Posted: Thu Oct 05, 2017 8:29 am Post subject: Re: Throttle body replacement recommendation. |
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Have a couple hundred miles on the this unit now.
I experienced slow or no return on the TB upon letting off the gas on the freeway this morning. Go to shift from 3rd to 4th and the RPMs remained steady in the 3-3.5k range through the shift. If I left the van in gear and slowed down via braking to 2K RPM or thereabouts, the idle would return to normal upon depressing the clutch. Let off the accelerator while cruising at 3k RPM and I could tell the van was not decelerating as it should be. Depress the clutch pedal and the same thing: RPMs did not drop to idle levels. TB was not closing.
Thoughts? I'm wondering if the original tension spring isn't up to the task and needs to be bent/shortened some to increase return force on the TB. _________________ '87 GL w/ Reimo top |
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dougass Samba Member
Joined: December 13, 2016 Posts: 300 Location: NJ
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Posted: Thu Oct 05, 2017 8:53 am Post subject: Re: Throttle body replacement recommendation. |
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Slimvest wrote: |
Thoughts? I'm wondering if the original tension spring isn't up to the task and needs to be bent/shortened some to increase return force on the TB. |
Have you opened up the engine bay to check it out?
Check your throttle linkage to make sure that is running smooth; disconnect it and manually operate the throttle and see if it is sticking.
I have the new GW throttle body also, no more than 300 miles so far and no issues. My first test drive I forgot to connect the return spring and it still ran fine, just a very light throttle. _________________ '91 GL - 2.1 automatic named Klaus for weekend adventures.
#klausvan & @thisisklausvan |
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mikemtnbike Samba Member
Joined: March 26, 2015 Posts: 2779 Location: North Carolina
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Posted: Thu Oct 05, 2017 9:21 am Post subject: Re: Throttle body replacement recommendation. |
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Mine is in my shopping cart waiting to be bought when there's a little more "disposable" in my account; but the directions on the website even give a pictorial on how to shorten the return spring to tighten the throttle feel. Did you try that? _________________ 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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Slimvest Samba Member
Joined: March 20, 2014 Posts: 431 Location: Portland, OR
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Posted: Thu Oct 05, 2017 9:51 am Post subject: Re: Throttle body replacement recommendation. |
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Thanks, guys. I'll dig into it more.
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just a very light throttle. |
This is very true. Upon initial install, I barely had to touch the throttle, but it has noticeably more resistance as I depress the pedal further. This may be a sign of something hanging up as well.
I was driving to work this morning and had to get in the office. I will take a look on my lunch break. _________________ '87 GL w/ Reimo top |
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Gauche1968 Samba Member
Joined: April 13, 2006 Posts: 1518
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Posted: Thu Oct 05, 2017 12:03 pm Post subject: Re: Throttle body replacement recommendation. |
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OK, so how difficult is it to make the "EFI wiring harness modifications" for an early 1.9L? _________________ 1984 Vanagon GL
1984 Vanagon Westy |
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mikemtnbike Samba Member
Joined: March 26, 2015 Posts: 2779 Location: North Carolina
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Posted: Fri Oct 06, 2017 4:52 am Post subject: Re: Throttle body replacement recommendation. |
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I don't know exactly how difficult it is, but I remember a different thread where 10cent said it was relatively easy and he didn't understand why it didn't come equipped appropriately. I think. Could be completely wrong. But, 10cent. _________________ 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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Slimvest Samba Member
Joined: March 20, 2014 Posts: 431 Location: Portland, OR
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Posted: Fri Oct 06, 2017 8:18 am Post subject: Re: Throttle body replacement recommendation. |
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All seemed to be functioning as it should after disconnecting cable and checking TB for any hang ups. Van sat in the 60-70deg parking lot at work and then I drove 125 miles to the beach and never had the issue. Woke up this morning to a crisp 40 deg and high idle had returned. Disconnected the cable and tried to get the TB to repeat the symptoms and couldn't do it. I have the stock tension spring attached from the plenum to the TB. Accelerater cable has never been changed in the 14 years I've owned the van so I may swap in my spare, but I'm troubled by the coincidence of the cable now being bad right after my TB was changed out. Would a vacuum leak when cold cause this?
Thanks everybody! _________________ '87 GL w/ Reimo top |
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CessnaJon Samba Member
Joined: August 15, 2008 Posts: 677 Location: Senoia,GA
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Posted: Fri Oct 06, 2017 9:47 am Post subject: Re: Throttle body replacement recommendation. |
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Check your temp 2 sensor. _________________ 1973 Westy (shared birthday)
1990 Westy Multivan
2015 Passat TDI 6sp
2015 Sportwagon TDI 6sp
LR-JET, Gulfstream 159 |
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Slimvest Samba Member
Joined: March 20, 2014 Posts: 431 Location: Portland, OR
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Posted: Fri Oct 06, 2017 3:22 pm Post subject: Re: Throttle body replacement recommendation. |
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What should the resistance be on the temp II?
I'm getting 1.1 ohms on a warm motor. _________________ '87 GL w/ Reimo top |
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Slimvest Samba Member
Joined: March 20, 2014 Posts: 431 Location: Portland, OR
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Posted: Sat Oct 07, 2017 9:22 am Post subject: Re: Throttle body replacement recommendation. |
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Temp II sensor is at 5.9 ohms cold.
I'm wondering if I've been dealt a funky Thottle Position Switch. It clicked just off idle position once and again at full throttle, but when I made the movement again, no click just off idle. Only clicks consistently at full throttle position. I may pull the TB to investigate further. TPS does not look to be adjustable when the TB is in the vehicle.
Emailed Gowesty and got a less than helpful reply: "Did you try adjusting the idle screw?" It may be time to just call Gowesty. _________________ '87 GL w/ Reimo top |
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CessnaJon Samba Member
Joined: August 15, 2008 Posts: 677 Location: Senoia,GA
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Posted: Sun Oct 08, 2017 8:02 am Post subject: Re: Throttle body replacement recommendation. |
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I had a temp sender fail at operating temp. Took a while figure out since it checked fine at temps below 140. There are cheap and easy to replace. _________________ 1973 Westy (shared birthday)
1990 Westy Multivan
2015 Passat TDI 6sp
2015 Sportwagon TDI 6sp
LR-JET, Gulfstream 159 |
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Slimvest Samba Member
Joined: March 20, 2014 Posts: 431 Location: Portland, OR
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Posted: Mon Oct 09, 2017 10:29 am Post subject: Re: Throttle body replacement recommendation. |
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Pulled the thottle body and adjusted the TPS to click just off idle as it's supposed to. Problem seems to have been resolved and I can now swap a TB in 5 minutes or less.
GW offered to ship a new TB free of charge with return shipping of the old one pre-paid. They also informed me that high idle can be a result of the TPS not functioning properly. _________________ '87 GL w/ Reimo top |
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IoWesty Samba Member
Joined: February 17, 2014 Posts: 181 Location: Iowa
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RoryGirl Samba Member
Joined: October 14, 2016 Posts: 768 Location: WestWorld Nanaimo BC
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Posted: Fri Nov 17, 2017 10:03 am Post subject: Re: Throttle body replacement recommendation. |
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Almost every post on this page is about that unit... _________________ 1991 Double door pop top conversion |
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tencentlife Samba Member
Joined: May 02, 2006 Posts: 10067 Location: Abiquiu, NM, USA
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Posted: Fri Nov 17, 2017 10:35 am Post subject: Re: Throttle body replacement recommendation. |
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Quote: |
What should the resistance be on the temp II?
I'm getting 1.1 ohms on a warm motor.
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Temp II sensor is at 5.9 ohms cold.
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It's supposed to be about 2.5-3kohm at room temp, higher if colder, and around 200-250ohm at running temp. You have a bad one or you're testing it wrong.
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I have the stock tension spring attached from the plenum to the TB.
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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.
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I don't know exactly how difficult it is, but I remember a different thread where 10cent said it was relatively easy and he didn't understand why it didn't come equipped appropriately. I think. Could be completely wrong. But, 10cent.
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Yes I'v explained this before, the TBS circuit is a simple switch, one wire is 5V from the ECU and the switch merely connects that to the other wire which returns to the grounding bus inside the ECU; essentially the TB signal as the ECU senses it is to ground that 5V line. Digijet or -fant, it's just a 2-wire simple-switched binary circuit, Digijet just has each wire leg split to go to the two parallel switches. To adapt the late-style single switch to Digijet, you just connect one leg on either side of the switch, an EV1 connector can be added if the mod is permanant. It couldn't be simpler and I'm amazed that a vendor can't, or won't, explain something so elementary to customers so they could sell more throttle bodies.
EV1 connector kit:
https://www.bmotorsports.com/shop/product_info.php/products_id/943 _________________ Shop for unique Vanagon accessories at the Vanistan shop:
https://intrepidoverland.com/vanistan/
Please don't PM here, I will not reply.
Experience is kryptonite to doctrine.
Last edited by tencentlife on Fri Nov 24, 2017 8:01 am; edited 1 time in total |
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