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#1
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I put an ohm meter on the Air Flow Sensor on a 300E.
I get inconsistent readouts, and jumpy readings. I am assuming there is crud on the wipers of the potentiometer inside. I would like to replace it, but cannot find one at any parts houses. all they sell are Air Flow Meters, which in the books, point to the intake housing that the fuel distributor mounts on. The car looses power AFTER a quick stop. Then it seems to run 'rich', for a mile or so, then "jumps" to full power. (Disconnecting the ESH solves the problem, but then I have no cold-start ability.) An eratic Air Flow Sensor seems logical to this problem. True? Or other sensor? (The computer has been replaced, and did not solve the problem.) The only thing that abated the problem ws to spray "Gummout" in the Air Flow Meter throat/hinge area (near the A/F Sens.) Any place I can locate a "Sensor".??? Or repair the one I have??? |
#2
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To get a new sensor you MUST purchase the shiny aluminum housing that it's bolted to. Thank UNCLE Sam for that! Very hard to calibrate w/o dyno, so spend $500-$600 & you get new sensor. Part number is 000-074-20-14 & has $585. list
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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 |
#3
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is it that whole assembly underneath the
air filter housing?? |
#4
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Yes, the Air Flow Meter is the large (5x10") cast aluminum
intake housing that the fuel distributor sits on, under the BIG air filter housing. |
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