Noisy Gauge

[Old Smoky]

Hey, Guys. I installed a Boost gauge and pyrometer on a 98 1/2 this evening. When I took it for a test drive I noticed a mechanical fluttering sound. When I looked at the boost gauge I could see it quivering a little. The gauges are from Banks, cant remember who really makes them though. Anyway, I have heard of this happening before but can’t remember the cause. Is it just the way it is, is the gauge bad, or what? Any help is appreciated. Thanks.



Mike

 

[hdm48]

Hey mike, I don't think they dampen those guages for responce/time reasons. And I remember this topic being covered before also but I don't know how it was listed. Do you have a different guage you can swap it with just to be sure it is the guage?

A bad valve or blown head gasket can make a guage do that. SORRY, just trying to scare ya. snicker-snicker

I tried looking for the post but it would help if I knew what the name of the thread was. So I guess I'm not being any help so Ill shut up.

Good luck



Dave

 

[BushWakr - RIP]

The last time a topic describing "fluttering sounds" was discussed, it was due to "air seperation" in the turbo. The earlier 1st gen hot end sufferred from that.



Or, it just may be someone put a cigarette paper across the end of your tailpipe..... ----> dave... .....



bOB.

 

[dshockley]

Bob,



I thought that fluttering sound was coming from the turbo itself, not the gauge???



Dan

 

[MikeO]

Been there...

... done that.



I had that same problem on my race Audi. It would resonate at part throttle between 5-10psi. Pretty annoying.



The trick is to install a fuel filter stuffed full of fiberglass insulation in line. Some companies sell a resonation eliminator for like $30 but you can make it for about $2.



I have a small metal in-line fuel filter stuffed with pink insulation between the manifold and the boost gauge in the Audi. It works like a charm.



Mike O.

 

[Old Smoky]

Thanks for the input guys. I have an extra Automeeter gauge that is off of my rig that I know works. I'll try it today and see what happens.



The noise is definitely coming from the gauge itself. It flutters/vibrates throughout its range. Only slightly at low boost, but quite noticeable at higher boost levels. I wouldn't't think that Banks would sell something that acted like this, having a reputation for high quality parts. I think it would really annoy me after a week or so seeing the needle twitch and having to listen to it, especially for how much $ their stuff costs.



Dave - I'll tear the head apart and check the gasket and valves. Maybe it just has too many valves.



Bob - If all else fails I will check for cigarette paper over the end of the tail pipe.



MikeO - Thanks for the idea. If its just the nature of the beast I might have to give that a try.



On a side note, the rig has a K&N filter, straight pipe, EZ box, and 300hp injectors. I thought that an over valved rig like this would really move. But, the ol' 92 still has it beat pretty good. Oo.



Mike

 

[Old Smoky]

It's the gauge. When I installed the Automeeter gauge everything was normal. So, should I recommend that he send the gauge back and get a new one, or is this normal for the Banks gauges?



Mike

 

[JStoll]

Im glad to hear that a diferent guage worked Ok I was concerned about possible valve problems as well

Id at least call banks & talk to them about it

but yeh the guage shouldent be noisy & twichy like that they will prolly fix/replace it

JAK