Pennock's Fiero Forum
  Technical Discussion & Questions
  Oil Pressure Guage

Post New Topic  Post A Reply
Email This Page to Someone! | Printable Version


next newest topic | next oldest topic
Oil Pressure Guage by nightscar
Started on: 05-23-2015 01:24 PM
Replies: 6 (347 views)
Last post by: fierofool on 05-24-2015 06:47 PM
nightscar
Member
Posts: 62
From: Ny, usa
Registered: Feb 2014


Feedback score: (2)
Leave feedback

Rate this member

Report this Post05-23-2015 01:24 PM Click Here to See the Profile for nightscarClick Here to Email nightscarSend a Private Message to nightscarEdit/Delete MessageReply w/QuoteDirect Link to This Post
Hey Guys,
Have a quick question. My Oil pressure gauge in my '85 Fiero I believe is reading right but I'm not sure.
When I turn the key to on the needle goes to 0.. is that where its suppose to read?
With the engine started it goes to 40-60 but after warmed up and in drive with the brake pressed.. it sinks pretty low.. close to 0.
I do have M1 synthetic oil in the car .. I don't know if that is what is causing it? and if its normal .. It sinks low to the point the oil light comes on in the guage as well ...
Should I adjust the needle to read above 0 when the key it set to on? or leave it at 0.. or maybe change the oil pressure sending unit?
Thanks for any help
IP: Logged
PFF
System Bot
Gall757
Member
Posts: 10656
From: Holland, MI
Registered: Jun 2010


Feedback score: N/A
Leave feedback





Total ratings: 88
Rate this member

Report this Post05-23-2015 04:02 PM Click Here to See the Profile for Gall757Send a Private Message to Gall757Edit/Delete MessageReply w/QuoteDirect Link to This Post
Sounds like it is working correctly. What weight Mobil 1 are you using?
IP: Logged
cmechmann
Member
Posts: 973
From: Baltimore Md.
Registered: Dec 2012


Feedback score: (1)
Leave feedback

Rate this member

Report this Post05-23-2015 04:05 PM Click Here to See the Profile for cmechmannClick Here to Email cmechmannSend a Private Message to cmechmannEdit/Delete MessageReply w/QuoteDirect Link to This Post
I would tee in a mechanical gauge to test what the real pressure is first to see if is not a wear problem.
IP: Logged
nightscar
Member
Posts: 62
From: Ny, usa
Registered: Feb 2014


Feedback score: (2)
Leave feedback

Rate this member

Report this Post05-23-2015 04:29 PM Click Here to See the Profile for nightscarClick Here to Email nightscarSend a Private Message to nightscarEdit/Delete MessageReply w/QuoteDirect Link to This Post
thanks for the reply guys.
I believe it's 10w30 for the M1 oil..
and I don't have a oil pressure tester .. (could I / should I) pick up an after market one, would that work the same way?

If the gauge is working correctly .. I guess just pull out the bulb for the oil light.. so it doesn't come on every time I'm at a red light haha?
IP: Logged
theogre
Member
Posts: 29386
From: USA
Registered: Mar 99


Feedback score: N/A
Leave feedback





Total ratings: 550
Rate this member

Report this Post05-23-2015 04:31 PM Click Here to See the Profile for theogreClick Here to visit theogre's HomePageSend a Private Message to theogreEdit/Delete MessageReply w/QuoteDirect Link to This Post
Low pressure is NEVER good. Pressure should be within rage at all engine RPM and temperature.
PSI See my Cave, Oil and Filter

 
quote
Originally posted by cmechmann:
I would tee in a mechanical gauge to test what the real pressure is first to see if is not a wear problem.

Yes. Never trust dash gauge anytime you have problems.

because if braking the car or brake lights On causing your issue then could be:
Have wiring/ground problems
Oil Pump and/or pickup tube have problems
low oil level. OP sender and tube or filter can leak w/o a big oil slick in a driveway.

Update/upgrade to 88 sender
See my Cave, Oil Sensor

------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)


The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)

IP: Logged
84fiero123
Member
Posts: 29950
From: farmington, maine usa
Registered: Oct 2004


Feedback score: N/A
Leave feedback





Total ratings: 325
Rate this member

Report this Post05-24-2015 10:23 AM Click Here to See the Profile for 84fiero123Click Here to Email 84fiero123Send a Private Message to 84fiero123Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by theogre:

Low pressure is NEVER good. Pressure should be within rage at all engine RPM and temperature.
PSI See my Cave, Oil and Filter

Yes. Never trust dash gauge anytime you have problems.

because if braking the car or brake lights On causing your issue then could be:
Have wiring/ground problems
Oil Pump and/or pickup tube have problems
low oil level. OP sender and tube or filter can leak w/o a big oil slick in a driveway.

Update/upgrade to 88 sender
See my Cave, Oil Sensor



Ditto, I have an old school mechanical oil pressure gauge that I keep in my test equipment tool box with a bunch of different fittings that I have used a few times over the years. interesting fact, years ago I looked up the amount of oil pressure that is the min recommended by the manufacturer in a Chilton manual, it said like 5 lbs. if I remember right. I was at a buddy's shop when I was looking at it and we both thought that was just a little low.

Steve

------------------
Technology is great when it works,
and one big pain in the ass when it doesn't



Detroit iron rules all the rest are just toys.

IP: Logged
fierofool
Member
Posts: 11833
From: Auburn, Georgia USA
Registered: Jan 2002


Feedback score:    (13)
Leave feedback





Total ratings: 151
Rate this member

Report this Post05-24-2015 06:47 PM Click Here to See the Profile for fierofoolClick Here to visit fierofool's HomePageClick Here to Email fierofoolSend a Private Message to fierofoolEdit/Delete MessageReply w/QuoteDirect Link to This Post
You can pick up a Sun oil pressure gauge at your auto parts store for about $15. They're designed for mounting under the dash, but that doesn't matter. Mine came with the correct fittings on the end of the long nylon tube. Makes it easy to tape the gauge to the rear window while you test drive. Just turn around and look at the pressure. On a notchback, you might even have enough line to bring around inside the passenger window.
http://shop.advanceautopart...n+oil+pressure+gauge
IP: Logged

next newest topic | next oldest topic

All times are ET (US)

Post New Topic  Post A Reply
Hop to:

Contact Us | Back To Main Page

Advertizing on PFF | Fiero Parts Vendors
PFF Merchandise | Fiero Gallery | Ogre's Cave
Real-Time Chat | Fiero Related Auctions on eBay



Copyright (c) 1999, C. Pennock