Zero vacuum at idle(SR20) - TriStateTuners.com :: Home of Tristate Auto Enthusiast

XAlliedYouthX · 06-25-2011, 06:43 PM

I haven't really driven my 240, has an SR20DET, in about a month so I'm not quite sure what could be going on. I noticed while I was driving around that my Defi boost gauge isn't going below -1 vacuum when I'm at idle or cruising in gear but not on the throttle. Before the car was sitting it was reading at the normal -20 or so. Other then the gauge reading wrong the car seems to be running just fine, no bogging or backfiring. Once or twice I think I saw my RPM's drop to nearly zero but it was out of the corner or my eye so I'm not 100% sure. Still, nothing felt strange when I thought it did that.

No idea if this could just be from a cracked vacuum line, bad gauge or what. Any ideas?

Renegade_ · 06-25-2011, 07:03 PM

If the car feels the same, try a different gauge or trace the line.

Ive melted, broke, and popped plenty of vacuum line and broke 2 boost gauges on my car.

OutToWinPAHC · 06-25-2011, 07:35 PM

Do your brakes work..... if so check the gauge. Before I did the Z brakes on mine and I cammed the V8 I was only making 6-8 feet of vacuum and the brakes would not hold so well.

XAlliedYouthX · 06-30-2011, 11:53 PM

I forgot to post that I found what the issue was. The next day I went out and followed my vacuum lines for about 10 seconds and found the issue real quick: http://instagr.am/p/Gcqfw/

I replaced the hose and everything is back to normal.

06-25-2011, 06:43 PM	#1
XAlliedYouthX Tri-State Addict Join Date: Feb 2007 Location: Horsham, Pa Member #3585 My Ride: '010 GTI / '91 240sx Hatch iTrader: (1)	Zero vacuum at idle(SR20) I haven't really driven my 240, has an SR20DET, in about a month so I'm not quite sure what could be going on. I noticed while I was driving around that my Defi boost gauge isn't going below -1 vacuum when I'm at idle or cruising in gear but not on the throttle. Before the car was sitting it was reading at the normal -20 or so. Other then the gauge reading wrong the car seems to be running just fine, no bogging or backfiring. Once or twice I think I saw my RPM's drop to nearly zero but it was out of the corner or my eye so I'm not 100% sure. Still, nothing felt strange when I thought it did that. No idea if this could just be from a cracked vacuum line, bad gauge or what. Any ideas? __________________ Xbox 360 Gamertag: XAlliedYouthX Last edited by XAlliedYouthX; 06-25-2011 at 06:49 PM.

06-25-2011, 07:03 PM	#2
Renegade_ Tri-State Post Whore Join Date: May 2006 Location: NNJ/NYC Member #1912 My Ride: 1J Swaggon iTrader: (2)	If the car feels the same, try a different gauge or trace the line. Ive melted, broke, and popped plenty of vacuum line and broke 2 boost gauges on my car. __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

06-30-2011, 11:53 PM	#4
XAlliedYouthX Tri-State Addict Join Date: Feb 2007 Location: Horsham, Pa Member #3585 My Ride: '010 GTI / '91 240sx Hatch iTrader: (1)	I forgot to post that I found what the issue was. The next day I went out and followed my vacuum lines for about 10 seconds and found the issue real quick: http://instagr.am/p/Gcqfw/ I replaced the hose and everything is back to normal. __________________ Xbox 360 Gamertag: XAlliedYouthX

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06-25-2011, 07:35 PM	#3
OutToWinPAHC Tri-State Post Whore Join Date: Jun 2007 Location: Tokelau Member #5081 My Ride: R33 GTS25T, RHD E46, Truck, part R32 GTR iTrader: (2)	Do your brakes work..... if so check the gauge. Before I did the Z brakes on mine and I cammed the V8 I was only making 6-8 feet of vacuum and the brakes would not hold so well.