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Old 04-21-2004, 06:53 PM
psfred psfred is offline
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Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
Sonny:

That model EHA uses 8 mV as "zero" current, I believe, with 0 being full fuel cutoff and 16 being full rich. When the cold start shut off, so did the fuel.

MB tends to use the same plug for everything, so if the wires reach, watch out! Seems silly to me, but hey, I only work on them!

Set the idle mixture to cure the hot start problem -- you are too lean. Use a digital VOM that reads duty cycle (not frequency) connnected to the #3 (red lead) and #2 (black lead) sockets in the round diagnostics connector. Set to 50%, or as close as you can get. The adjuster is under the "tower" on the fuel distributor, 3mm allen wrench. Insert wrench into fitting, then press down to engage the actual adjuster. Turn a small amount and lift wrench back up and let the number stabilize -- takes about 20 sec at idle for the O23 sensor to settle down.

Peter
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