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#1
08-16-2006, 10:55 PM
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Tempmatic-Feedback Pot. Adjustment
My 87 190D 2.5 N/A is gonna get a new feedback potentiometer and I was hoping someone has done this R+R before? How is the best way to get the voltage reading?
 Gonna do the 3 vacuum elements as well...Any pointers? I also noticed that the 1987 supplement states that the voltage is a much tighter number than the previous models; 2.4 to 2.7V as opposed to 3.9 to 4.4V........anyone know why? Thanks! Clip
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#2
08-17-2006, 08:08 AM
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The 1987 & later cars use a different pushbutton assembly. measure the voltage on the old feed-back pot first...they are adjustable.
2.7V when at min & at least 15" vacuum on the green vacuum line to the pot.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#3
08-22-2006, 03:16 PM
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Anyone know
 where to measure the voltage of the Feedback Pot.??
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#4
08-22-2006, 03:33 PM
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At pins 1 & 2 of the 3 pin connector that is part of the feedback pot behind the glovebox.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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Linear Mode
