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  #1  
Old 02-04-2012, 02:06 PM
wbski007
 
Join Date: Jan 2012
Location: Mary Esther, Fl
Posts: 17
Anybody tell me what this is and what it does

This is off my 92 300CE with a 3.0 you know the one not getting gas to the injectors, I sucked on the vacuum line and it doesn't seem to have any resistance, I still haven't checked the fuel pressure yet, I'm waiting for a gauge, but I thought I'd take this off and see if I could see a filter or screen but no go. Another thing I was thinking of trying is blocking off the return line and see if would run that way??

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Anybody tell me what this is and what it does-picture-191.jpg  
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  #2  
Old 02-04-2012, 03:00 PM
Senior Member
 
Join Date: Nov 2002
Posts: 860
it is a pressure regulator. the line is not vacuum but a vent line to dump fuel in case the diaphram ruptures. blocking the return won't help but dump MORE fuel. good luck, chuck.
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  #3  
Old 02-04-2012, 04:01 PM
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Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 15,438
They can fail. Solution is new one $$$.
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  #4  
Old 02-04-2012, 04:03 PM
wbski007
 
Join Date: Jan 2012
Location: Mary Esther, Fl
Posts: 17
OK thanks, I'm trying to figure out why I have fuel going to the dizzy but non to the injectors?? they say you have to have, 85-90 lbs pressure but then I have one guy saying he's only getting 60 lbs at the dizzy and his car runs fine, I know I'm getting a good amount at the dizzy because after cranking her over a few time and then cracking the line at the dizzy there is alot of pressure, how much I still don't know but it seems to me to be quite a bit, I'm getting a fuel pressure gauge tomorrow and I'll see just how much I'm getting.

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