[W126 Coupe] engine will not rev past 5,000 rpm

[Jim Nowak]

I changed both fuel pumps last night so we'll see if
that was the issue.  If not, I may have to switch to
an EFI system sooner than expected.  

Jim


--- Mister McGoo <eelploot at hotmail.com> wrote:


---------------------------------

Jim;

I know this is not the same problem as yours, but last
week, coming to the end of a 2 hour drive, I suddenly
couldn't rev above about 1500rpm.  I had been driving
110-120 Kph and out of the blue, 70 Km/hr was the top
speed.  And a hill slowed me down to 40 Kph.  No bad
noises, oil pressure fine, temp fine, perfect idle.

I figured something had crawled under my accelerator
pedal and died there, but no.

The problem?  The tri-pivot (mounted over the #1
injector) connecting the accelerator to the throttle
rod and the cruise servo rod, had seized absolutely
solidly.  Obviously, so solid it was that a 200lb foot
on the accelerator pedal couldn't budge it.

When it cooled down (the day was hot, the engine
compartment was hotter!) I could move the pivot and
take it apart.  Bizarre! 

-Bellamy





>From: Jim Nowak <jjnowak_32503 at yahoo.com>
>Reply-To: Mercedes Coupes Mailing Lists
<mbcoupes at mbcoupes.com>
>To: Mercedes Coupes Mailing Lists
<mbcoupes at mbcoupes.com>
>Subject: Re: [W126 Coupe] engine will not rev past
5,000 rpm 
>Date: Mon, 20 Jun 2005 20:24:40 -0700 (PDT)
>
>Does anyone know if a bad throttle position switch
can
>hinder the engine in the upper rpm range?  My engine
>hts a wall at 5,000 rpm and will rev no further.  Any
>ideas?  How do you test the TPS to make sure it is
>working properly?
>
>
>Jim
>The MB Coupes Website!
>W126 SEC Mailing List
>Postings remain property of MB Coupes, L.L.C.



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