Quote:
Originally Posted by lsmalley
Is there a way to check the duty cycle using voltage readings?? I read this article BOSCH KE3-JETRONIC MIXTURE ADJUSTMENT and followed the formula:
reading from pin 2 & 3 on x11 connector divided by battery voltage and then 1-the sum of that and convert it to a percentage. So this is what I got:
my reading from x11 was jumping between 6.5v - 5.Xv
my battery voltage at idle was 14.4v
I divided 6.5/14.4 = .451
then I subtracted 1 - .451 = .549 which gives me roughly 55% + or -
Is this correct? Can anyone tell me what the normal duty cycle for my car should be roughly?
1990 190E 2.6 California versioin
It idles around 700-750 rpm which is what it says on my yellow sticker on the radiator bracket. |
The Landiss article is excellent and specifies the proper range of duty cycles for 2500 and idle. I'm not sure if your duty cycle calculation is correct. It's best to use a meter that reads duty cycle directly to be sure. I borrowed one from a friend that has that function, and I recall there have been some threads on commonly available multimeters with a duty cycle function and one was available at a reasonable price from Sears.
Duke