Date: Mon, 12 Jan 2015 13:07:19 -0600
Reply-To: Kevin Duvernay <kduvey@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Kevin Duvernay <kduvey@GMAIL.COM>
Subject: Re: Hesitation off idle, throttle body issues?
In-Reply-To: <B3A7E8C0-3EDA-40F4-9913-C9E0B26E917B@comcast.net>
Content-Type: text/plain; charset=UTF-8
I'm quite certain I'm adjust the throttle switch... I just mention the
throttle cable because the lever it's attached to is what I'm moving while
adjusting the switch. The Bentley/Haynes manuals specify a very short
distance for that lever to move before the the switch clicks, but I cannot
physically get my switch adjusted to be within spec, I believe it to be
switching too far from idle. The adjustment range bottoms out before I can
get it withing proper adjustment, and I suspect this is why I'm getting the
slight bogging off idle. Does that make sense? Sorry if I'm not making
things clear.
On Mon, Jan 12, 2015 at 12:52 PM, OlRivrRat <OlRivrRat@comcast.net> wrote:
> I get the impression that you are actually adjusting something
> other than the TPS
>
> as the ThrottleCable has nothing to do with the TPS Adjustment ~
>
> ORR ~ DeanB
>
> On 12 Jan , 2015, at 11:36 AM, Kevin Duvernay wrote:
>
> > Thanks Stuart,
> >
> > I would not describe the switch to be 'immediate' upon applying throttle,
> > there is a small distance the cable retracts before it engages. The
> > adjustment bottoms out and will not allow me to make it any closer. Also,
> > the switch does not switch at full throttle, however the van seems to run
> > great even at full throttle.
> >
> > Sounds like I need to remove the TB and inspect/clean it. Any thoughts on
> > Gowesty's vacuum operated TPS? Worth the money?
> >
> > On Mon, Jan 12, 2015 at 12:29 PM, Stuart MacMillan <stuartmacm@gmail.com
> >
> > wrote:
> >
> >> I just did this adjustment, and the first thing you need to do is remove
> >> the TB so you can really see what's going on. Use a voltmeter set on
> ohms
> >> to check, and the TPS should switch immediate upon moving the throttle,
> and
> >> switch again only at max throttle.
> >>
> >> Go Westy has their own version of a new TPS for $50, and a rebuilt TB
> with
> >> switch for $250.
> >>
> http://www.gowesty.com/ec_search_results.php?search_phrase=throttle+position
> >> You only need a TB if the shaft is so worn that it wobbles sideways.
> >>
> >> Stuart
> >>
> >> -----Original Message-----
> >> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
> >> Of Kevin Duvernay
> >> Sent: Monday, January 12, 2015 9:59 AM
> >> To: vanagon@GERRY.VANAGON.COM
> >> Subject: Hesitation off idle, throttle body issues?
> >>
> >> Hey guys,
> >>
> >> I recently messed with the tps adjustment to try to fix a 'bucking' with
> >> on/off throttle that I'm experiencing and it created a new issue. My 87
> >> westy w/ 2.1 is now hesitant just off idle for a second or two.
> Depending
> >> on how the tps is adjusted, it can even actually stall. It's worse if I
> >> punch the throttle rather than ease into it. Once I get up off idle it
> runs
> >> fine.
> >>
> >> Problem is, I cannot get it adjusted enough to be perfect. If fact, the
> >> adjustment seems to do very little to actually change the location where
> >> the switch switches on and off, which I believe is too far from the idle
> >> position (lever moves almost 1/4 inch before the switch clicks no matter
> >> how far I tighten the adjustment screw). If I tighten the adjustment
> screw
> >> all the way and tighten the set screw while still keeping the adjustment
> >> screw tight then I get it to run best, but not quite perfect. Very
> slight
> >> hesitation, but I know it's still there.
> >>
> >> I fear there may be something worn in the throttle body preventing
> >> accurate adjustment of the switch. Also, the braided hose that the
> purple
> >> vacuum tube slips into seems a little damaged, may or may not be leaking
> >> slightly?
> >> I taped it up, didnt seem to change anything.
> >>
> >> Either way, the van ran perfectly before I tried to adjust the switch,
> FYI.
> >>
> >> Time for a rebuilt throttle body? Anything else I can try first? Is it
> >> possible to rebuild a throttle body myself?
> >>
> >> Thanks
> >>
> >>
>
>
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