Boost gauge needle oscillating ???
#1
Registered User
Thread Starter
Boost gauge needle oscillating ???
I just noticed today that my boost needle oscillates whenever the boost is between 10 and 25psi. It is rock solid above and below those pressures. The movement amounts to something like plus and minus 1/2 psi (1psi total movement) and it is pretty fast... the tip of the needle is basically a blur.
Has anybody seen this before? Do I have a bad gauge? Bad hose? Or is it indicative of some other intake problem?
By the way this is an Auto Meter "Phantom" 2-1/16" 0-35PSI mechanical boost gauge. It is run into a "boost bolt" in the intake manifold.
Thanks
-Mark
Has anybody seen this before? Do I have a bad gauge? Bad hose? Or is it indicative of some other intake problem?
By the way this is an Auto Meter "Phantom" 2-1/16" 0-35PSI mechanical boost gauge. It is run into a "boost bolt" in the intake manifold.
Thanks
-Mark
#4
Registered User
Same thing here too. I was told that because of the location of the boost bolt and that the pressure fluctuates because of the opening and closing of the valves of the closest cylinder.
#5
Registered User
Thread Starter
Okay, thanks for the feedback so far. Funny thing is, I don't recall the needle bouncing before... and the gauge has been there for more than 2 years. Maybe my eyes are getting old
Anyway, I am going to move the boost tube to a port on my (Pusher) intake horn and see if there's any difference.
-Mark
Anyway, I am going to move the boost tube to a port on my (Pusher) intake horn and see if there's any difference.
-Mark
#6
Registered User
Thread Starter
Problem Solved!
I took out the boost bolt and moved the pressure tube to a port on my intake horn. Now the pressure reading is stable regardless of the boost pressure.
-Mark
-Mark
#7
Registered User
Join Date: Oct 2004
Location: eastern Washington
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
I have a similar problem now and had it a couple years ago, I found a cracked boost line at the gauge; it would flutter at high boost. I havent looked into the current problem....yet.
Thread
Thread Starter
Forum
Replies
Last Post
piperca
24 Valve Engine and Drivetrain
14
07-04-2006 04:13 PM
SolarYellow05
3rd Gen High Performance and Accessories (5.9L Only)
12
04-09-2006 05:39 AM
RonP
3rd Gen High Performance and Accessories (5.9L Only)
12
04-24-2005 07:00 PM