Date registered: May 2011
Vehicle: 1970 Mercedes 250c, 1977 mercedes 230 (put to rest at a junyard she served me well)
Location: Great Barrington, MA
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ICU, etc. etc.
This happened to me kind of, it wouldn't start, I changed the coil, had the resistors tested, changed the ICU, and it ran w the new ignition module but stalled and stuff like you said. I put the original coil back in, and all the problems went away.
My friend tested the old ICU w a mulitmeter, and found bad resistors, so the module was definitely the problem, but the coil they sold me at carquest, and the ones other stores brought up in their computers ended up being totally wrong. The original bosch coil from 1977 worked. There are some ideas for you, definitely sounds spark related, what type of coil/ resistors are you using?
If it's starting and running, its not a bad connection or wire, because if it was it wouldn't just run and then decide to not be connected. Somethings not sparking the way it should.
Last edited by makinfrenzinmybenz; 05-03-2011 at 07:34 PM.
Reason: another thought.