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#1
11-29-2002, 10:58 AM
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Small Shake at Idle
If someone has any idea what's happening here I would really like their opinion.
The car feels fine. When I pull up at a stop light and the engine slow's to idle, I get a small shake kind of like a engine miss, but I'm pretty sure the engine is running well. Here's the rub (so to speak) If I shift it into neutral the shake goes away. The idle speed changes only slightly maybe 50rpm or so. When I drop it back into Drive with my foot on the brake, the shake has, for the most part gone away. It builds back slowly as I sit with the car in gear and my foot on the brake. In neutral it hardly feels like the car is running. But with the car in drive I get the vibration. I haven't heard anyone talk about this before so I'm worried about the transmission.. ( I always worry about the transmission  ) Any help ?Thanks
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Mitch Hansen
"uncamitzi" This is a Dark Ride 92 Teal SVX LS-L 128K tranny swap with 4.11's Well.. my days of not taking you seriously have certainly come to a middle . 
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#2
11-29-2002, 12:04 PM
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Mine does the EXACT same thing. Todd (wawazat??) even commented on it when we went for a "beer run" in my car a few weeks ago. I dont let it concern me, but it would be fantastic if we could figure out how to fix it.
Mike
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#3
11-29-2002, 02:52 PM
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Glad to hear my car is not the only one with a little vibration -- only at low idle too. If the AC is on -- no vibration. My tech is convinced the motor mount bushings need to be replaced. Will let you know how it turns out.
aloha nick
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#4
11-29-2002, 04:59 PM
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Probably a small vacuum leak. I found one in mine some time ago. There's a vacuum reservoir under the right side of the intake manifold. In front of it (towards the p/s pump) is a vacuum hose with a small check valve. My check valve had cracked from years of heat and was just enough of a leak to put a small 'bump' in the idle. See: 'Vc tank' at http://www.subaru-svx.net/photos/files/Beav/5309.gif
Others have found loose intake plenums and manifolds, etc. Vacuum leaks are the most common cause of idle roughness (with no other symptoms.)
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ASE Certified Master Automotive Technician w/L1. ASE Certified Master Medium/Heavy Truck Technician. Certified EVT (Emergency Vehicle Technician) Last edited by Beav; 11-29-2002 at 05:02 PM.
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#5
11-30-2002, 12:03 AM
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Thanks Beav
Quote:
__________________
Mitch Hansen
"uncamitzi" This is a Dark Ride 92 Teal SVX LS-L 128K tranny swap with 4.11's Well.. my days of not taking you seriously have certainly come to a middle .
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#6
12-01-2002, 02:24 AM
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Quote:
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Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads.
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#7
12-01-2002, 09:13 AM
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Quote:
Todd
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Down to none 
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#8
12-01-2002, 12:02 PM
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I've found that some gas makes my car shake a little at idle. When I lived in VT, there was a 'discount' gas station that I always bought my gas at. I tried switching to a Sunoco station or something like that, and the shake went away.
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 2005 RX-8 Grand Touring 2005 Outback 2002 Mercedes-Benz E320 wagon END OF LINE
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#9
12-02-2002, 08:31 AM
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When I removed the intake I found that alot of those small rubber vacuum hoses were so brittle they just fell apart. Probably leaked quite a bit up until that point.
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Matt Locker Link 2015 BRZ Limited 6MT 92 Ebony LS-L ECUtune Stage2av1, Z32 MAF, 370cc injectors, TomsSVX intake, BontragerWorks 22mm RSB #003, HID Hi and Lo beams, OT endlink and bushing mods, PWR Aluminum radiator, Harvey's QC shift kit, 2.5" flowmaster 80 exhaust, 17" Michelin Pilot Sport A/S, Poly sway bar bushings, Slotted Bradi rotors, AFBeefcake powdercoated calipers, 97 grill, and a huge set of air horns. 300,000 miles and counting 92 Ebony LS-L. ecutune stage1v4, motorsport 1pc pulley. Garage Queen - sold to Dad in upstate NY 155,000 miles 19 Subaru Ascent Premium - -Hers !. 89 DL 4x4 little red wagon - a.k.a. The immortal suby. 275k R.I.P.
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#10
12-02-2002, 10:05 AM
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?
Quote:
__________________
Mitch Hansen
"uncamitzi" This is a Dark Ride 92 Teal SVX LS-L 128K tranny swap with 4.11's Well.. my days of not taking you seriously have certainly come to a middle .
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#11
12-02-2002, 10:25 AM
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Just the top intake part. Pictures are in my locker. It is not hard to do at all, just plan on having enough extra hose to replace the ones that are cracked and new intake gaskets. If you haven't changed the PCV valve yet, this is a good time to do it.
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Matt Locker Link 2015 BRZ Limited 6MT 92 Ebony LS-L ECUtune Stage2av1, Z32 MAF, 370cc injectors, TomsSVX intake, BontragerWorks 22mm RSB #003, HID Hi and Lo beams, OT endlink and bushing mods, PWR Aluminum radiator, Harvey's QC shift kit, 2.5" flowmaster 80 exhaust, 17" Michelin Pilot Sport A/S, Poly sway bar bushings, Slotted Bradi rotors, AFBeefcake powdercoated calipers, 97 grill, and a huge set of air horns. 300,000 miles and counting 92 Ebony LS-L. ecutune stage1v4, motorsport 1pc pulley. Garage Queen - sold to Dad in upstate NY 155,000 miles 19 Subaru Ascent Premium - -Hers !. 89 DL 4x4 little red wagon - a.k.a. The immortal suby. 275k R.I.P.
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