W201

190E 2.3 ecu temp sensor

I am having trouble with cold running and now with running period. Starts fine and stumbles until warm. Changed ovp with new one-better but not much, changed O2 sensor with NGK model-initially better but now appears lean when running above 1500rpm-stumbling. O2 appears to be working. Don't have duty function meter. Stumped. Coding but do not have code reader. Going to get one. Ecu temp sensor resistance supposed to be 250 hot to 2000 cold but that does not jive with charts I have seen. 260 to 300 hot. Very inconsistent cold.

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88 190d shut off lever staying down/ hard start

After I drive my 190D and shut It off,I noticed it has a hard time to restart sometimes.It has been like this for awhile now.After checking things out, I found that the stop lever on the injection pump stays down and takes a long time to come back up.Would this be a fault in the shut off valve?If i have someone hold the lever up the car starts right up.What would cause this to do that?

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