[T3] I'm a little confused about the cylinder head temp sonsor

[William J]

What do I need to release the tangs that hold the terminals in the MPS and 
TPS and trigger plastic plugs . I have never checked them or tightened them 
. I have jewelers screw drivers yet they have a round shank and may not work 
well . It seems the tang at least on the TS2 , once I pressed it down so I 
could pull the terminal out the tang stayed down and had to be bent back up 
. I was hoping I could use something to just depress the tang and not do 
that or is that not possible?


----- Original Message ----- 
From: "Jim Adney" <jadney at VWType3.org>
To: <type3 at vwtype3.org>
Sent: Monday, August 01, 2016 12:41 PM
Subject: Re: [T3] I'm a little confused about the cylinder head temp sonsor


>I know that some people think it make sense to add series or parallel
> resistance to the temp sensors, but I've never done that and never
> seen the need. I wouldn't expect to see this change the idle speed,
> just the mixture. Yes, it would take a sniffer to see this, or you
> might see it on your gas mileage if you keep really careful records.
>
> On 1 Aug 2016 at 12:11, William J wrote:
>
>> . I've read VW had a 200 ohm resister in series to offer a richer mix . 
>> Then I read charts showing the temps and relative resistance .
>>
>>  Then I read the ECU does not see the TS2 below 300 ohms and it needs to 
>> get below 300 to show the engine is fully warmed up . Also read if it 
>> does down to 70 ohms it will take to long to richen until the head temp 
>> brings it back up .
>>
>>  I found the plastic cover on the TS2 was so black I could not see the 
>> terminals so I found a double clear one and then realized the terminals 
>> were only touching or held together by the fit of the plastic cover now I 
>> can see they are connected and tight .
>>
>>  I know the ECU see's the sensor because if un plugged no start or un 
>> plugged running it will quit yet how do I know if the ECU see's the 
>> change and changes the mix ?
>>
>>  Say it's hot and I add 250 ohms and it runs the same at idle should I 
>> notice a change in running or is this something only a sniffer would see? 
>> I did try a 250 ohm resister and at idle everything seemed the same , I 
>> though it might make a change in RPM .
>
> -- 
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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