Re: [T3] Jerky Little Squareback. Fuel injection?

["Randy Hougham" <hougham@indianvalley.com>]

<x-flowed>I pulled the wire on the TVS this afternoon and the problem seems to have 
gone away. It was a intermittent problem so I'll drive it a few more days 
just to make sure we got it. Is the part that needs to be replaced that 
black box to the right of the throttle body?

Thanks, Randy
'71 Squareback
----- Original Message ----- 
From: "Jim Adney" <jadney@vwtype3.org>
To: <type3@vwtype3.org>
Sent: Thursday, March 03, 2005 8:42 AM
Subject: Re: [T3] Jerky Little Squareback. Fuel injection?


> On 3 Mar 2005 at 7:15, Randy Hougham wrote:
>
> > My 73 Squareback starts and idles fine but some times at about 30 -40mph 
> > it
> > starts to buck around. This happens even when the engine is warm. It also
> > happens at higher speeds only not as bad. It seems like if you're doing
> > 65mph and start to go up a very slight grade it will trigger this 
> > bucking.
> > It's got stock fuel injection. What could be the problem?
>
> Here's a test to check out one possibility: Just unplug the throttle 
> position
> switch (TVS.) That's the plug that goes into the black box mounted on the 
> right
> end of the throttle valve shaft. Just unplug it and drive it that way for 
> a few
> days. If THAT problem goes away, you need a new TVS.
>
> During this test, if you drive the car spiritedly, you may notice a
> sluggishness or hesitation which wasn't there before. That's simply due to 
> the
> lack of a TVS, so don't confuse that with the bucking and missing that 
> you're
> watching for.
>
> Let us know what you find in your test.
>
> --
> Jim Adney
> jadney@vwtype3.org
> Madison, WI 53711-3054
> USA
>
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