Rapid Moving Needle On Oil Pressure Gage - Need Ideas

[Wknd_Warrior]

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]

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]

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]

Must have been something inside the gauge internally loose.

 

[Wknd_Warrior]

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]

Glad to see all is OK, I was leaning towards improper pan to pick-up clearance....

 

[Grn92LX]

Yay I was right

Whats the combo again?

 

[Wknd_Warrior]

Whats the combo again?

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]

Can't wait to hear about the numbers. How high are you spinning? What rear gear are you running?