190E 2.6 Random Stall
Ok. I am having a similar problem to several other members. Random stalling of the engine, can occur at idle, while cornering or at steady speed. No warning, spluttering etc. Just sudden and total engine shutdown.
History: Can has rarely run smoothly in the 7 years I have had her. One fuel pump failed about two years ago. I went through three mechanics who failed to diagnose the problem since fuel pressure only declined at 4000 rpm when under load. However to keep car running the CO mixture, Duty Cycle was turned way rich. After I found and replaced the bad pump the car ran wonderfully until about two months ago when the stalls started.
Usually the car restarts after a stall except when really hot. Have since corrected the duty cycle to 50% and restarts are very easy.
I do not think issue is OVP related - I pulled OVP fuse and engine speed increased and no stall. Idle air valve is operating and EHA sits at 0 ma. Have pulled on just about every wire and tapped every relay but to no effect.
Where should I look next?
Thanks,
Ian.
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