1990 300E oil pressure sending unit...where
Thread Starter
Joined: May 2006
Posts: 60
From:
1990 300E oil pressure sending unit...where
My 1990 300E, (3.0) pegs the dash oil pressure gauge (high end) in the on position and stays in the same position when the engine is started and all the time its running. I suspect the sending unit has gone to ground but am at a loss as to where the sending unit is. Anyone out there have this situation occur?
Your input is greatly appreciated!
Thanks much!
Michael
Your input is greatly appreciated!
Thanks much!
Michael
Joined: Nov 2004
Posts: 43
From:
RE: 1990 300E oil pressure sending unit...where
my 94 e320 did the same. This was because the wire from the sending unit (which is located on the side of the oil pan) was not connected, giving this false reading. You can connect the wire, and if it goes down to 0 reading then the sending unit is bad. (which is what occured with mine). You have to remove the oil pan to remove the sending unit. I heard it was a common problem on these cars. Hope this helps.
j-mang
j-mang
Joined: Jan 2006
Posts: 76
From: Houston, Texas
RE: 1990 300E oil pressure sending unit...where
ORIGINAL: mgw_300e
are you talking about the oil level sensor or the pressure sensor? I thought the pressure sensor was up near the filter somewhere.
are you talking about the oil level sensor or the pressure sensor? I thought the pressure sensor was up near the filter somewhere.
Member
Joined: Jul 2006
Posts: 86
From:
RE: 1990 300E oil pressure sending unit...where
on my e320...the pressure sending unit was on the side of the oil pan...the reason it shot to 3 was becuz the main plug was unplugged..(previous owner unplugged it...so it can read 3...so i wont know the sending unit was bad) i plugged it back in...it read 0..never changed....so i changed the sending unit (located inside the oil pan) and bam..it works...hope this helps
j-mang
j-mang
Thread Starter
Joined: May 2006
Posts: 60
From:
RE: 1990 300E oil pressure sending unit...where
J-Mang,
What do you mean by the "main plug" and where is it. I still fail to understand a pressure sending sensor on the pan, I thought that was for oil level.
thanks for your reply!
Michael
Disregard...I see the new account and name change above.
What do you mean by the "main plug" and where is it. I still fail to understand a pressure sending sensor on the pan, I thought that was for oil level.
thanks for your reply!
Michael
Disregard...I see the new account and name change above.
Member
Joined: Jul 2006
Posts: 86
From:
RE: 1990 300E oil pressure sending unit...where
Sorry for the earlier confusion. I have uploaded 2 pdf files to my site so maybe some help will come of them.
j-mang
www.blueboxpcs.com/testingoilpressure.pdf
www.blueboxpcs.com/oilpressuresensor.pdf
j-mang
www.blueboxpcs.com/testingoilpressure.pdf
www.blueboxpcs.com/oilpressuresensor.pdf
