Weird Oil Pressure Issue - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1979-1995 Mustang GT

Join Mustang Evolution Today

Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 05-22-2014, 09:09 PM   #1
Registered User
Join Date: Apr 2014
Location: South Riding, VA
Region: Virginia
Posts: 1
Weird Oil Pressure Issue

New to the forum! New to 5.0s! Thanks in advance!

So normal driving, oil pressure is great. It is very steady around 60 psi. But under heavy acceleration, the oil pressure slowly drops. It does not drop to zero but goes pretty low to about I would say 20 psi. As soon as you take your foot out of it, it goes right back to normal. Factory gauge.

Here are the particulars on the car: 89 LX 5speed. I just bought this car a couple of weeks ago. It looks like an aftermarket block but its hard to tell. Was told it is a 306 with forged pistons at minimum. TFS heads, X303, original cobra intake with 70mm throttle body, Vortech V1, Aftercooler, FMU, T-Rex booster pump, MSD 6AL BTM, BBK Long tubes, off road h-pipe, mac 2.5 cat back. When I bought it, the car was way over the previous guys head. It had a wicked vacuum leak that was the plenum gasket and it ran like total crap so I never pushed it hard. That is till today after I fixed all that.


PWR SHFT is offline   Reply With Quote
Old 05-23-2014, 02:41 PM   #2
Registered Member
smurf stang's Avatar
Join Date: Mar 2014
Location: Miami
Region: Florida
Posts: 1,276
Factory gauge is doodoo.

Unfortunately a good aftermarket one would dispel any concerns.

2016 VW GTI 2.0 Turbo

1989 Sonic Blue LX Coupe, 349 ci, TW heads, TFS Track Heat Intake, 75mm Accufab TB, 80mm ProM, 30 lb. inj, TKO, 3.73, 31 spline w/ TruTrac, MAC 1-5/8" LT headers w/ H pipe, Flowmaster, electric fan Moates QH
391 rwhp & 424 rwtq...Mustang Dyno 11.5@122mph
smurf stang is offline   Reply With Quote
Old 05-28-2014, 05:52 PM   #3
scottydsntknow's Avatar
Join Date: Apr 2013
Location: JB MDL
Region: New Jersey
Posts: 15,297
Factory gauge? There's your problem. The factory gauge is not accurate in any way shape or form whatsoever. You need a good aftermarket gauge to have any idea what your actual PSI is.
2000 Mustang GT Steeda build #48. Bolt ons, suspension, Novi 2000.

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
scottydsntknow is online now   Reply With Quote

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1979-1995 Mustang GT

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are On
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Weird electricsl issue pony_dogg 2005-2010 Mustang GT 7 01-07-2013 10:07 AM
weird pulling issue nosympathy 2011-2014 Mustang GT 36 11-20-2012 06:06 PM
Oil, Oil Additives, Oil Filters, FACTS robb15033 General Mustang Discussion 2 08-02-2012 11:37 AM
fuel line pressure vs rail pressure Sirtat 2005-2010 Mustang GT 2 01-10-2012 06:03 PM
OMG.. WEIRD.. so weird.. wiarumas The Bar 14 02-17-2005 01:45 PM

» Like Us On Facebook

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2012 Social Knowledge, LLC All Rights Reserved.

10:29 AM

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 is in no way associated with or endorsed by Ford Motor Company.