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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?
Comments: To: OlRivrRat <OlRivrRat@comcast.net>
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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