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  #1  
Old 05-05-2011, 07:52 PM
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Join Date: May 2011
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What is the switch on throttle linkage

I have a 1993 300d 2.5 turbo. I have a post about excssive smoking posted and still trying to track cause.

I noticed a three prong switch / sensor on the throttle linkage over the valve cover. Does anyone have a pic of this arrangement,? There is a bolt hole beside it with nothing there, just curious if any thing should be there for the switch / sensor to sense?

I checked the SM wiring diagrams and it appears to be the "control rod sensor" but not sure I'm reading the diagram correctly. What does the switch / sensor up there do?

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  #2  
Old 05-05-2011, 08:38 PM
aaa aaa is offline
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AC shutoff?
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Old 05-05-2011, 08:44 PM
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Thanks .....
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Old 05-06-2011, 02:05 AM
sjh sjh is offline
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My car is the 90 300D 2.5 and it has two sets of micro-switches. The nylon (?) races that trigger them switch at different throttle positions.

As above I've been told one is AC related but I do not know the purpose of the other.

I'd like to though.
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Old 05-06-2011, 07:36 AM
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for egr i believe.
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punkinfair
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  #6  
Old 05-06-2011, 09:44 AM
sjh sjh is offline
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Quote:
Originally Posted by punkinfair View Post
for egr i believe.
So having done gsxr's conversion it's now probably inactive?
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  #7  
Old 05-06-2011, 03:42 PM
compress ignite's Avatar
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Micro switches on "Throttle" Linkage

AAA and P.F. have got "it".

(And the D.M. "Wastegate"ectomy negates the EGR switch)

Two Microswitches:
Rear one, I believe, is EGR and the Front one is WOT A.C. shutoff.
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Last edited by compress ignite; 05-06-2011 at 03:59 PM.
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  #8  
Old 05-06-2011, 04:58 PM
sjh sjh is offline
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Thanks. I like knowing what's doing what on my car.

PS - The ...ectomy is a GREAT mod and once one gets over whatever trepidation they have about doing it it's pretty straight forward, except, perhaps getting that clip off the first time!

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