[W126 Coupe] question about throttle position switch help anyone/everyone

[Dick Spellman]

Gary, for your original question the answer is NO there is no way to
calibrate the tps.  You should get closed at idle, open anywhere else in the
throttle plate movement and a closed at WOT (wide-open-throttle) which is
the other circuit on the 3-pin switch.

I've torn down one throttle body to remove a heavy carbon build-up and
replace the original tps that proved to work just fine. There is the painted
(yellow) screw to the side of the throttle body which adjusts the stop on
the throttle plate but, if you go just a bit too far on this screw, the tps
will not give you a closed at idle reading.  It's factory set and should be
left alone IMHO.

Take care,
Dick

On Sat, Jan 3, 2009 at 6:24 PM, Gary <garysalas at yahoo.com> wrote:


> alright !   thanks for the info     ....can always count on you.  thanks

> again !!

>

>

> *Dick Spellman <dick.spellman at gmail.com>* wrote:

>

> Gary,

> I don't know what year MB we are talking about but, if the code is on the

> diag. connector with red LED up at the firewall by battery, you need to

> reset the code and then see if it crops up again.

> Do you have this type of code reader and does it have a little thumb button

> next to the red led? If so, depress and hold for something like 5 seconds

> until it gives one long blink then release.  That should reset it.

> Dick

>

> On Sat, Jan 3, 2009 at 5:46 PM, Gary <garysalas at yahoo.com> wrote:

>

>> once i close the throttle plate and hook the meter to the electrical posts

>> what should the meter do or display?

>>

>> *Dick Spellman <dick.spellman at gmail.com>* wrote:

>>

>> Gary,

>>

>> You need to check the closed position of the throttle plate in the

>> throttle body then attach the tps and test.  You may have a bad wiring

>> harness to the tps as well.  If the car was starting then stopping abruptly

>> it could well be the throttle plate and body have a build up of carbon. This

>> will prevent the throttle plate from closing and your tps will never read

>> closed circuit at idle as it should.

>>

>> Regards,

>> Dick

>>

>> On Fri, Jan 2, 2009 at 7:53 PM, Gary <garysalas at yahoo.com> wrote:

>>

>>> i replaced the old one and i still get the number 10 code   which is the

>>> tps.    so i'm wondering do i need to calibrate the tps.  i was told if i

>>> did i had to use a analog multi meter.  and what parameters/numbers am i

>>> looking for?

>>> The MB Coupes Website!

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>>> Postings remain property of MB Coupes, L.L.C.

>>>

>>

>> The MB Coupes Website!

>> W126 SEC Mailing List

>> Postings remain property of MB Coupes, L.L.C.

>>

>>

>>

>> The MB Coupes Website!

>> W126 SEC Mailing List

>> Postings remain property of MB Coupes, L.L.C.

>>

>

> The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain property of MB Coupes, L.L.C.

>

>

>

> The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain property of MB Coupes, L.L.C.

>

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