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Rapid Moving Needle On Oil Pressure Gage - Need Ideas

  • Thread starter Thread starter Wknd_Warrior
  • Start date Start date Feb 15, 2006

Wknd_Warrior

TunaMan
Founding Member
Jan 31, 2000
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0
36
New Jersey
Feb 15, 2006
#1
  • Feb 15, 2006
  • #1
I just got my 347 running last week. I have put about 150 miles on it. Today, the needle on my oil pressure gage starting doing something I've never seen before. It was moving incredibly fast between 40-60 lbs. So fast I couldn't capture it on my video phone. It's a blur...

I changed the oil filter, and it seemed to help, but I haven't driven it.. now its "flickering" between 40-45 lbs at idle.

This is a mechanical gage, and it's not leaking on either end. I don't see any leaks on the engine... so I'm stumped. The oil looked good in the filter, and I pulled the dipstick....looks nice and clean.

I'm gonna go to the auto parts store tomorrow and buy a cheap gage to see if my Autometer gage is malfunctioning... also will drop and change the oil.

Any ideas what it could be or what to check?
 

Grn92LX

Fidanza Man!
Founding Member
Jan 14, 2001
6,819
64
129
New York
Feb 15, 2006
#2
  • Feb 15, 2006
  • #2
It could be the gauge. My friend has an autometer phantom mechanical fuel pressure gauge and it will bounce back and forth rapidly sometimes.
 

Wknd_Warrior

TunaMan
Founding Member
Jan 31, 2000
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Feb 15, 2006
#3
  • Feb 15, 2006
  • #3
More info.... It's braided line from the block to the gage. Also, it wasn't doing it earlier this morning, or now....

I went to a friend's house and he lent me a gage. I just started it cold, and it's fine. ???? I didn't change gages... this is the same one.

What does that mean?
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,260
17,945
224
Massachusetts
Feb 15, 2006
#4
  • Feb 15, 2006
  • #4
Must have been something inside the gauge internally loose.
 

Wknd_Warrior

TunaMan
Founding Member
Jan 31, 2000
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Feb 20, 2006
#5
  • Feb 20, 2006
  • #5
Just wanted to let everyone know, that it was the gage that was bad. Put a new one in and all is well. Thanks for all the help.
 

Rick 91GT

Mustang Master
Nov 29, 1999
9,692
95
99
PA
Feb 20, 2006
#6
  • Feb 20, 2006
  • #6
Glad to see all is OK, I was leaning towards improper pan to pick-up clearance....
 

Grn92LX

Fidanza Man!
Founding Member
Jan 14, 2001
6,819
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129
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Feb 21, 2006
#7
  • Feb 21, 2006
  • #7
Yay I was right

Whats the combo again?
 

Wknd_Warrior

TunaMan
Founding Member
Jan 31, 2000
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36
New Jersey
Feb 21, 2006
#8
  • Feb 21, 2006
  • #8
Grn92LX said:
Whats the combo again?
Click to expand...
It's a big bore 347. Same heads CNCed Brodix T1s, .640 lift solid roller (I forget the duration), spyder intake....new fuel system, Hooker Super Comp headers and 3 inch X and flows. 38# injectors....everything else is the same.

Be putting it on the dyno next week. Will post N/A #s and Nitrous.
 

Grn92LX

Fidanza Man!
Founding Member
Jan 14, 2001
6,819
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129
New York
Feb 21, 2006
#9
  • Feb 21, 2006
  • #9
Can't wait to hear about the numbers. How high are you spinning? What rear gear are you running?
 
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