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
>> 
>>