Polish

I installed a Prosport Boost Gauge using the wrxtra boost gauge install kit (the one that came with the gauge looked cheap. I was very impressed with the workmanship of the kit from wrxtra.com). I followed the instructions from wrxtra.com and installed the "T' fitting into vacuum line coming off (or in) of the BOV. I used the clamps that came with the kit and clamped down all three sides of the "T" fitting. I took the hose coming off the bottom of the "T" and fed it through the fire wall ( doesn't go straight the the firewall. I have it zipped tied to some other hoses to make it look clean. The instructions said to do this.) and then to the dash where the boost gauge is located. I hooked it up the the boost gauge by fitting the hose over the needle on the boost gauge and clamping it down.

So here is my problem, at idle the needle flutters. It is not fluttering big (as in needle travel) but just sits there and flutters at about 20 inHg. Once i give it alittle gas it stops fluttering. The gauge seems to be reading right. I don't see alot of boost until 2nd gear and at WOT through 3rd and 4th I am seeing about 13psi. When I get into 4th at full boost it seems like it flutters at 13psi also.

I don't really know what to think. I don't think I have a vacuum leak, but I guess it could be. Would car vibrations cause it to flutter since the hose is zip tied to other hoses?

Is it safe to drive my car?

Any help would be greatly appreciated!!

Polish

Onizuka

iTrader: (17)

Generally on WOT coming close to the end of the power band near red line, the boost should decrease (for safety, I believe). If I'm not mistaken, your car should read around -9 psi while at idle.

I have a Defi BF boost gauge that reads in bar, it doesn't flutter at all at idle, but boost does taper towards the end.

I think it might help if you attached a photo of what it looks like.

Last: I have a brass t-fitting if you feel the nylon one isn't sufficient (and this one won't snap either, I've snapped a nylon one by accident). I had to buy them in a package of 5, so let me know if you need one, we can work something out.

Polish

Hey whats up Charlie,

Long time no see. I have been out of town about every wednesday for the last 2 months. I am going to try and make it out this week.

Anyways, the install kit i bought from wrxtra.com came with a brass fitting.

I just did about 3 hard runs to see then I got scared to drive my car untill I get this fixed. So I don't know if it was tapering off at WOT. It could be though.

Polish

Anyone else?

Polish

Here are some videos!!!

Sorry for the shakyness, hard to hold a digital camera and drive.

Boost Gauge at IDLE: http://www.youtube.com/watch?v=1nvozVCQ1mE

Boost Gauge from 5mph to 15mph in first gear: http://www.youtube.com/watch?v=tDicVXuZljI

Boost Gauge in second gear, mild gas, to 5k RPM: http://www.youtube.com/watch?v=55kR1zHbLo0

Boost Gauge at WOT in third gear:http://www.youtube.com/watch?v=9D5u-euC298

Polish

No kinks from firewall to boost gauge either.

Polish

bump for some help

VRT MBasile

iTrader: (17)

my car does that too. I have a defi BF. mods are TBE, Up Pipe, and tune. i cant remember if its always done this though...I never really paid attention before

mattsn0w

iTrader: (23)

that's what you get for using a mechanical boost gauge instead of digital.

I had a gauge that did similar jumping. it's mostly just poor assembly and part quality IMHO.

Polish

Ya I was thinking about calling the people I bought it from to see if I could get another one. Probally not though.

Krinkov

iTrader: (21)

saw the vids and still not sure I understand your problem, what all is it doing(not doing) in those vids that has you concerned?

Polish

Only the Idle video expresses the problem I am having. The other videos were to make sure nothing else is going wrong which I assume there isn't. If you look closely at the idle video (might be too blurry, damn digital camera) the needle sits there and flutters or vibrate. I am assuming at idle the needs should in a relatively fixed location. I don't have exprerience with boost gauge because my WRX is my first turbo car.

Polish

I called Prosport Gauges today and they said they would give me another one if I send this one back.

The guy was really nice and helpful. +1

RedStage

iTrader: (4)

With mechaincal gauges you will have some movement at idle.

The car when idling does not put out a 100% constant vacuum.

I wouldn't be surprised to see the new gauge do the samething once you get it installed.

Polish

Well....might as well try. I really like the way the gauges look and I have the matching Oil Pressure and EGT Gauge. So...I guess I'm stuck with it if the new one does the same thing.