LOw oil pressure at idle - Diesel Forum - TheDieselStop.com
Ford Diesel Forum / Powerstroke Forum
Ford Diesel Forum / Powerstroke Forum
Go Back   Diesel Forum - TheDieselStop.com > Ford Diesels > 7.3L IDI Diesels (Not Power Strokes)

7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

TheDieselstop.com is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 04-06-2007, 04:21 PM   #1 (permalink)
Junior Member
 
Join Date: Apr 2007
Posts: 5
My Photos: (0)
Feedback Score: 0 reviews
LOw oil pressure at idle

OK the deal is I have an 89 f350 7.3 diesel. Love this truck first diesel and never going back to gas. The issue iam having is the truck just recently started to have low oil pressure after it is warmed up at idle. We talking idiot lite on and my oil pressure gauge at the minimum. But only at idle. If i give it a little gas the pressure comes back up.From talking to a few mechancs there saying that its probly bearing wear. AHHHH. I was hoping i could get away with changing the oil pump but I iam still green with this engine any advice is very welcome. Thxs
robdog89 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 04-06-2007, 05:43 PM   #2 (permalink)
Senior Member
 
Join Date: Aug 2002
Location: near Cleveland, Ohio
Posts: 5,224
My Photos: (0)
Feedback Score: 0 reviews
Re: LOw oil pressure at idle

What weight oil are you running?
__________________
1997 Ford F350 SRW 7.3L PSD
1985 Ford Ranger 2.3L 5 speed
1966 Mustang 200 I6, auto, 4 wheel disk, power brake retrofit, Corvette master.

Former vehicles, 1994 E350 7.3L IDI, 1985 International 1654 rollback, 6.9L IDI, (2) 1994 Ford E350 7.3L IDI, 1985 Ford F350 DRW 6.9L IDI, 1985 Ford F350 wrecker 6.9L IDI.

*dual ASE Master Certified, Automotive, Medium & Heavy trucks*

Owner / operator, Patriot Automotive, N Ridgeville OH
Mr_Roboto is offline   Reply With Quote Quick reply to this message
Old 04-06-2007, 05:52 PM   #3 (permalink)
Senior Member
 
Snotzalot's Avatar
 
Join Date: Sep 1999
Location: Pocono Mountains, PA
Posts: 4,190
My Photos: (5)
Feedback Score: 0 reviews
Re: LOw oil pressure at idle

Replace your sending unit before you do any major repairs.
__________________
Regards,

Paul - Pocono Mtns. USA
02 E350 15 Passenger Cream Puff, 72,000 Miles, 5.4L Gasser

'90 E350 7.3L Ex-Ambulance High Top 420K Miles, No Turbo, Stock Stock stock, No ELC! (Extended Life Coolant) & 10 Oz. Bars Stop Leak. 10 wonderful cool years using Freeze12 without any AC system modifications. Retired 11/8/2011 with blown trans.


Drunk Driving - America's #1 Form Of Terrorism!
Snotzalot is offline   Reply With Quote Quick reply to this message
Old 04-06-2007, 07:03 PM   #4 (permalink)
Senior Member
 
cdnsarguy's Avatar
 
Join Date: Jan 2003
Location: Neepawa, Manitoba Canada
Posts: 20,671
My Photos: (109)
Feedback Score: 0 reviews
Re: LOw oil pressure at idle

Do a pressure test or hook up a manual oil guage.......

Our diesels only have 10 PSI at curb idle 650 RPM and 40-70 PSI at 3000+ rpm.

The OEM sender and guage are on/off switch at 7 psi......
__________________
93 F250 7.3 IDI S/C XLT 4X4 E40D 3.55LS, Captains chairs, Tutone Mocha, Leer 48" Hiboy cap, FR & RR hitches, full DeeZee running boards. Factory ordered/delivered Jan 93

Toys: 2006 37' Triple E Embassy coach (powered by Cummins), 18' Sylvan Pro Fish with Mariner motors.

Proud Canadian BOOB man too!!

Please PRIVATE MESSAGE only!! ...
Please DO NOT.....visitor message me...
cdnsarguy is offline   Reply With Quote Quick reply to this message
Old 04-07-2007, 11:38 AM   #5 (permalink)
Senior Member
 
Join Date: Sep 2006
Location: Cleveland OH
Posts: 113
My Photos: (0)
Feedback Score: 0 reviews
Re: LOw oil pressure at idle

after the sending unit and mechanical gauge, it is probably the oil pressure relief valve in the oil cooler. pull off the oil cooler and see if its stuck open. even a little will have a drastic effect on oil pressure. the way i look at it is

new oil pump and bearings (rod and mains)= alot of money'
oil cooler header= 264 (if i remember corrrectly)
check that before doing bearings and save yourself some money becuase unless its knocking it probably isnt your bearings.

or you could do what i did and replace everything while your in there

good luck
matt
__________________
ASE Certified: Medium and Heavy Truck Diesel

Federally certified air brake technician

1990 F-250 7.3 IDI N/A 4x4 ZF5 Dana 60 front, LUK Clutch SMF, 215k

1991 Ford B700 6.6l School bus, Straight pipe

1987 Ford F350 Dump 4x4 c6, 38k miles, 8 foot meyers plow
2002 VW Golf TDI
1989 Festiva (my favorite)
1989 Saab 9000 Turbo
2002 Saturn SL1 (Daily Driver)
1950 Dodge Coronet
1996 F150 2wd 4.9 5 spd, 136k
Http://www.ammomotorsports.com
90734x4 is offline   Reply With Quote Quick reply to this message
Old 04-08-2007, 08:01 PM   #6 (permalink)
Junior Member
 
Join Date: Apr 2007
Posts: 5
My Photos: (0)
Feedback Score: 0 reviews
Re: LOw oil pressure at idle

Thanks for the advice. I'am going to replace the oil pump the cooler and sender. and but it all back in. I took the engine out to do a clean up on the engine and the bay. Thxs again.
robdog89 is offline   Reply With Quote Quick reply to this message
Old 04-08-2007, 08:17 PM   #7 (permalink)
Senior Member
 
Join Date: Aug 2002
Location: near Cleveland, Ohio
Posts: 5,224
My Photos: (0)
Feedback Score: 0 reviews
Re: LOw oil pressure at idle

If you are going to drop the pan, replace the oil pickup also. No matter how much you work at it, you can never get all of the hardened sludge buildup out.
__________________
1997 Ford F350 SRW 7.3L PSD
1985 Ford Ranger 2.3L 5 speed
1966 Mustang 200 I6, auto, 4 wheel disk, power brake retrofit, Corvette master.

Former vehicles, 1994 E350 7.3L IDI, 1985 International 1654 rollback, 6.9L IDI, (2) 1994 Ford E350 7.3L IDI, 1985 Ford F350 DRW 6.9L IDI, 1985 Ford F350 wrecker 6.9L IDI.

*dual ASE Master Certified, Automotive, Medium & Heavy trucks*

Owner / operator, Patriot Automotive, N Ridgeville OH
Mr_Roboto is offline   Reply With Quote Quick reply to this message
Old 04-09-2007, 12:28 AM   #8 (permalink)
Senior Member
 
cdnsarguy's Avatar
 
Join Date: Jan 2003
Location: Neepawa, Manitoba Canada
Posts: 20,671
My Photos: (109)
Feedback Score: 0 reviews
Re: LOw oil pressure at idle

[ QUOTE ]
I'am going to replace the oil pump the cooler and sender

[/ QUOTE ]

Now there is a ton of money.........possibly wasted. We here usually advise check things out first.......but you have aready removed the engine...
__________________
93 F250 7.3 IDI S/C XLT 4X4 E40D 3.55LS, Captains chairs, Tutone Mocha, Leer 48" Hiboy cap, FR & RR hitches, full DeeZee running boards. Factory ordered/delivered Jan 93

Toys: 2006 37' Triple E Embassy coach (powered by Cummins), 18' Sylvan Pro Fish with Mariner motors.

Proud Canadian BOOB man too!!

Please PRIVATE MESSAGE only!! ...
Please DO NOT.....visitor message me...
cdnsarguy is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  Diesel Forum - TheDieselStop.com > Ford Diesels > 7.3L IDI Diesels (Not Power Strokes)

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Forum - TheDieselStop.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 10:26 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.