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  #16  
Old 08-28-2008, 04:43 PM
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You can't argue with success...but I wonder about the ECM failure since it was initially a fuel issue you were encountering on the car (air in the fuel lines as I recall)...was that resolved too?

It seems very coincidental that the ECM got fried when you had another problem...one of the causes of ECM failures is improper jump starting (like reversing the polarity of the cables). Is it possible after your battery was dead that someone improperly jumped it?
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2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz
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  #17  
Old 08-28-2008, 07:47 PM
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Quote:
Originally Posted by nhdoc View Post
You can't argue with success...but I wonder about the ECM failure since it was initially a fuel issue you were encountering on the car (air in the fuel lines as I recall)...was that resolved too?

It seems very coincidental that the ECM got fried when you had another problem...one of the causes of ECM failures is improper jump starting (like reversing the polarity of the cables). Is it possible after your battery was dead that someone improperly jumped it?
My initial diagnosis was also biased towards a problem with my fuel system because I had just replaced my shut-off valve and some fuel lines. After reading more about the schematics of the fuel system, I noticed that the "return" line was the line that had air in it. What was weird was that no fuel was pumping at all through the lines. What I did see was air bubbles slowly coming up through the return lines. My application of a vaccuum to the lines was also on the wrong fuel line. I had opened up my fuel prefilter and stuck the vaccuum hose into the well of the prefilter housing. I know, dumb. I should have hooked it up to the line that went into the prefilter instead to check flow.

It is probable. Unfortunately, I'm the guy that was jump starting the car so the only blame could be placed on me. I was using the charger on "low maintenance" and at the 50 amp setting for jumping purposes. I don't really know what reversing the polarity of the cables means. Can you explain?

Thank you for all your help guys. I really appreciate it. This weekend I'm going to attempt to replace my delivery valve seals based on Parrot Of Doom's DIY.
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-1984 Mercedes 190D 2.2 5-speed gray market(bought@30,000 miles) (Sold back to original owner@170,000 miles)
-1999 Mercedes E300DT (245,000 miles)
-1999 Mercedes S500 Grand Edition (80,000 miles)
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  #18  
Old 08-28-2008, 08:05 PM
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Quote:
Originally Posted by EdzBenz View Post
...I don't really know what reversing the polarity of the cables means. Can you explain?
It means accidentally reversing the + and - jumper cables when connecting them from the charger to the car. You can also blow a battery up by doing that but easily can fry the ECMs in these cars even if it is just for a moment reversed.
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