[W126 Coupe] Re:IDLE AIR VALVE

[Dan Gardner]

I have been running my SEC with the 45o bypass tube removed and the holes 
plugged this has brought the idle down to an acceptable 750 RPM.(from 
1200RPM)
    I was thinking of fitting an adjustable valve but it needed to be 
blocked of totally to acheive the desired result.
I priced a new one at the MB dealership @$1475 AUD but they offered me a 
club discount of $70AUD(How generous!).Aftermarket suppliers quoted me 
$375AUD for the same original VDO part.I would estimate it costing $10 to 
manufacture.
    Question is how do I test the existing one to make sure it is definitely 
out of specification,(the problem occurred after I cleaned it with carb 
cleaner) before I buy a new one.
    I cannot find a vacuum leak anywhere,resistance is to spec.(as per CD 
ROM)
    All suggestions most welcome.

                                            Kind Regards  Dan Gardner  1986 
560 SEC (Euro 220KW) 




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