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Starting issues.. Not cps!

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Old 07-15-2011, 02:08 PM
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Starting issues.. Not cps!

So this morning my car wont start the first time, it will start on the second or third try. I changed the cps last summer and it is not the same thing again. Seems like fuel pumps or fuel relay problems from what I've read on here. I checked under my seats like 4 months ago and there were no leaks from the pumps/filters but now since the starting issue I hear a buzzing noise comming from under the rear seat? Gonna check my pumps and relays right now. Any other thoughts? Thanks!
Old 07-15-2011, 02:28 PM
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Check also the fuel socket in the trunk, I got it melted once
Old 07-15-2011, 10:23 PM
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Checked the fuel socket on the right side, and everything was fine. When I removed the backseat and started the car, the pass side fuel pump was humming pretty loud. Never heard this before untill the problems started. So I need a new pass side pump? The part number I got from it is A211 470 1794, is this still correct or is there any updates on the part#? Anyone know how hard install is?
Old 12-27-2012, 03:15 PM
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Hello,
I know this is an old posted but i did like to know how you solved your issue. I have the same problem now. Please help. Thanks
Old 12-27-2012, 04:22 PM
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W212 E63 AMG S Model
Originally Posted by nphra
Hello,
I know this is an old posted but i did like to know how you solved your issue. I have the same problem now. Please help. Thanks
I had a similar issue as well. It wasn't CPS for me... but apparently some fuel leaked and shorted the harness for the fuel pump. I ended up having to replace the pump and harness at the stealership. Wasn't a cheap bill...
Old 12-28-2012, 11:08 AM
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Originally Posted by efiftyfizzle
I had a similar issue as well. It wasn't CPS for me... but apparently some fuel leaked and shorted the harness for the fuel pump. I ended up having to replace the pump and harness at the stealership. Wasn't a cheap bill...
Thanks for the reply. I will, focus on the fuel pump.
Did your pump running or making sound when you have the key in the "ON" position?
Old 12-28-2012, 02:25 PM
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Originally Posted by nphra
Thanks for the reply. I will, focus on the fuel pump.
Did your pump running or making sound when you have the key in the "ON" position?
I can't remember to be honest with you... it literally happened like right when I got the car and I didn't know too much about all of these issues. I happened to do all the research about it after I got the problem fixed because from what it sounds like, it's likely to happen again.

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