PeachParts Mercedes-Benz Forum - View Single Post - HELP! W126 Won't Start

gmercoleza · #5 05-07-2007, 11:59 AM

OK, yesterday I was poking around under the hood. Took out the OVP, removed the fuse to inspect (it was fine), and reinserted everything. Tried to start the car, but it wouldn't. Then I wiggled the small plug with the green wire going to the ignition module and noticed it wasn't seated all the way. It was on there tight, just not seated all the way (maybe plugged in about halfway). I reseated it, then checked a couple other things (can't remember which). A minute or two later, I cranked it and the engine fired right up. With the car running, I went back and wiggled the small plug again, loosening it and tightening it, etc. playing with it to see if I could get the car to stall with it partially seated. The only way I could kill the car was by completely unplugging the small plug. Having it partially seated seemed to have no effect on the running engine.

I drove the car an hour to work today, and though it ran fine, I am scared. Could this be an intermittent problem? Will I be stranded when it's time to go home? I'm not fully convinced that reseating the small plug had anything to do with the car running now. Especially since the plug seals all the way around the socket, so I can't figure out how moisture could even get in there.

Questions:

* It was raining heavily when the car was originally parked - is it possible moisture got into the plug and caused a poor connection? Yesterday was in the 80s so it's conceivable that the moisture dried out. If moisture was the cause, wouldnt' the car have run poorly or stalled before I parked it?

* Can this be a sign of the CPS going south? Should I get under there after work and take some measurements? How do I do so?

* Has anyone ever experienced this? The car was running like a champ one day, dead as a doorpost the next, then running great again as of yesterday.