EHA settings - PeachParts Mercedes-Benz Forum

300holst · #1 01-15-2007, 01:13 PM

I'm not familiar with the adjustment of the EHA (yet), However, you stated that you set the digital voltmeter to 20volts and connected it in series with one of the wires to the EHA. I believe you intended to measure the current flowing to the EHA and thus the meter should be set to a current scale (ma or A).

When the meter, set at volts is connected in series, it has a very high resistance and blocks the current to the EHA. If this is what is happening, the EHA will not be functioning and may explain your starting/ running problems.

just-n-time · #2 01-15-2007, 02:47 PM

Quote:

Originally Posted by 300holst

I'm not familiar with the adjustment of the EHA (yet), However, you stated that you set the digital voltmeter to 20volts and connected it in series with one of the wires to the EHA. I believe you intended to measure the current flowing to the EHA and thus the meter should be set to a current scale (ma or A).

When the meter, set at volts is connected in series, it has a very high resistance and blocks the current to the EHA. If this is what is happening, the EHA will not be functioning and may explain your starting/ running problems.

Well I went out and reset the meter to ma. and it sputters as if to stall so back to DC Volts and it is reading very well.
I dont know for sure but the turn ccw may have shut the fuel down to not enough to allow it to run,I went back into the EHA and turned the screw the half and one more making it a full turn cw and it started up.Then I reset the air mix to smoth it out I now have a reading of 6.2 @ x11 #3
and +9.69 at EHA. j-n-t

just-n-time · #3 01-15-2007, 03:51 PM

Quote:

Originally Posted by just-n-time

Well I went out and reset the meter to ma. and it sputters as if to stall so back to DC Volts and it is reading very well.
I dont know for sure but the turn ccw may have shut the fuel down to not enough to allow it to run,I went back into the EHA and turned the screw the half and one more making it a full turn cw and it started up.Then I reset the air mix to smooth it out I now have a reading of 6.2 @ x11 #3
and +9.69 at EHA. j-n-t

Ok,recap time,I reset the EHA,then got it to start,readjusted the air mix till a very smooth Idle tried the MA. settings again after pulling the ICV plug to get 2000 readings.it worked no sputter,these are the readings,hold on there,well
Warmed fully 80C
EHA idle -.00 to +.01
X11#3 10MA setting .2 to.5 slow rise and fall
EHA 2000 -.01 to +.08
X11#3 10MA setting .02 to.06 very slow rise and fall with a very long pause between movement.
Thats it how did I do?
next the potentiometer settings and more need for help thanks for the help.
j-n-t