Rotating the pot body while the engine is running IS how you make the adjustment. If the engine runs ok when you start it, leave the pot in that position until up to operating temperature, and idle has stabilized. If voltage reading is out-of-range, then make a very small rotation, and wait until idle has restabilized before remeasuring. Repeat until correct.

Steve

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'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7

Yes, I aligned the pot with the engine running. I installed the pot using the same alignment marks from the old one and left the screws slightly loose. Then I started the car and and watched the voltage reading (pin 2 to ground) while adjusting the alignment. Be careful to rotate the pot VERY slowly or the engine will surge or die.

Also be aware on the M103 that you have to disconnect the fuel pressure regulator to get at the lower right screw on the pot. I just undid the big fuel connection on the top of the regulator (a small amount of fuel will leak out) and also removed the mounting bolt and pushed the regulator aside enough to get the screw out. My car had T10 Torx screws and a Craftman torx screwdriver worked well to reach through all the wires and hoses. When aligning the pot, you have to hook up the fuel line and then disconnect it again to tighten the lower right screw when completed.

Gents,

Trying to find out where in the WIS are the specs to adjust the potentiometer of my 300E and didn't found anything. Can anyone point me to the right page/direction?

TIA,

Mobi

They should all be 0.7 volts. The service manuals were on Braingears.com but that site is now closed. Get a set of manuals, CD's actually, on Ebay or they may be for sale here.

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Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.

wbain5280,
Thank you, i have all the WIS CD's/EPC allready installed, could you please be a little bit more specific, which section/number, etc ? BTW, sad to know that braingears is off-line, had many times checked out those webpages when i was away.
Another question, is it 1<->ground, 2<->ground, 3<->ground pins 0.7V? Or between 1<->3, 2<->3 and 1<->2 pins? That's why i need to find the .pdf directly from the WIS, to not disturb the forum and you with questions that i can access myself directly in the WIS-CD's.

Thank you,

Mobi

It is on the CD, but it is buried in one of those tables in the CIS troubleshooting and diagnosis section. Unfortunately, my CD's went with the car.

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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe

Finding 3437224015 or the new one ending 035?

Hi, does any body know if these available anywhere at the moment?

Thanks, Paul.

I have searched on-line for one recently and was told by everyone that they are no longer available. I think you can still purchase the entire airflow sensor but that is really expensive and much more work.

-John

Is the 0.7V the same for the V8? It's the same part.
I have 1.1 volts at idle and it idles fine...but the rpm does surge while driving. Could this still be the pot.?