Boost gauge problem ..
02-14-2004, 08:03 PM
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Boost gauge problem ..
So ..My gauge only shows -15 to -16 hg at idle ..Noramly people are running -20 hg. My car boost fine..runs fine ...Think I have a small leak possibly ? Anyone else have this problem ? 
02-14-2004, 08:20 PM
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Re: Boost gauge problem .. (Hoosier Daddy)
Well ...That could also be a prob ...It reads 5 psi and kinda spikes to 8 but thats called for on a GReddy kit .
02-14-2004, 08:29 PM
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Re: Boost gauge problem .. (Im Rick James)
mine idles at 15-16 hg at idle. When im on the road and let off the gas, it goes to 20 hg. I thought that was kind of weird but not sure.
02-14-2004, 08:34 PM
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Re: Boost gauge problem .. (Im Rick James)
A leak would cause you to have a false vac reading but my d16y8 pulled a solid 20-22 hg and it still pulled that with a cracked ring land in the end too. It just blew out a nice cloud when i hit boost 
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02-14-2004, 08:54 PM
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Re: Boost gauge problem .. (Im Rick James)
I was running 7psi with a greddy kit but i would spike anywhere from 9-10 psi trying to hold 7 psi to red line with my profec A. For fuel I just had a inline pump and a fmu. It took me about 30,000 miles to kill the sohc and about 5-6 150+ mph top speed runs.
02-14-2004, 09:32 PM
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Re: Boost gauge problem .. (Im Rick James)
I had the same problem with my boost gauge when i was running the greddy kit. I found out the problem was in the gauge itself. Where the hose was connecting to the back of the gauge i used some of that plumbers take to seal the connection. I after i did it fixed everything and i consistently read -20 on the gauge.
02-15-2004, 12:08 AM
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Re: Boost gauge problem .. (Im Rick James)
well i'll let you know that your not alone + i'm running the greddy turbo 15g... Mine read 16 vac on idle, sometimes it would go down to 20. And the boost would only read 5psi when i floor it and 9psi in 4th gear. Also it can read about 9psi when its 3/4 throttle. not too sure if its a vac leak yet, really had no time to figure it out.
02-15-2004, 05:15 PM
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Re: Boost gauge problem .. (Im Rick James)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Im Rick James »</TD></TR><TR><TD CLASS="quote">You mean teflon tape ?thanks</TD></TR></TABLE>
Yes exactly..I had crushed at least two of those little ***** inbetween the boost gauge connection before I finally taped that damn thing up and fixed the problem.
Yes exactly..I had crushed at least two of those little ***** inbetween the boost gauge connection before I finally taped that damn thing up and fixed the problem.
02-15-2004, 05:22 PM
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Re: Boost gauge problem .. (Dengar)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dengar »</TD></TR><TR><TD CLASS="quote">
Yes exactly..I had crushed at least two of those little ***** inbetween the boost gauge connection before I finally taped that damn thing up and fixed the problem.</TD></TR></TABLE>
**** mine are crushing also. So I need telpon tape to make that stop ?
Yes exactly..I had crushed at least two of those little ***** inbetween the boost gauge connection before I finally taped that damn thing up and fixed the problem.</TD></TR></TABLE>
**** mine are crushing also. So I need telpon tape to make that stop ?
02-15-2004, 05:24 PM
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i am running no boost right now and only have 45K on my car and my vafcII reads about 11-12psi in vacume and about -13-14psi when i let off the gas while going. my car runs awesome and responds great, i dont think i have a vacume leak or anything.....any opinions?
Modified by smurfey002 at 3:00 AM 2/16/2004
Modified by smurfey002 at 3:00 AM 2/16/2004
02-15-2004, 06:08 PM
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Re: (smurfey002)
Yeah -20hg should be showing boost or n/a ....You might have a leaky gauge like we do. Tephlon tape it up and go from there. Could have a small crack in one of your hoses .
02-15-2004, 07:10 PM
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Re: (Im Rick James)
I think you are fine. I believe 15-21 is normal. For each 1000 feet you go up in elvation your vaccum increase by 1 hg. best way to test vaccum leak is take a propane tank with a hose hooked to it. Go around the engine where you think the leak is, with the propane and if there is a leak then the enigne rpm will change.
02-15-2004, 07:11 PM
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02-16-2004, 05:27 PM
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yea, but i dont have a gauge hooked up just yet (well anymoer that is) it was my vafc that was giving me the -10-12 readings. btw, i am reading in psi. you guys are too right?
