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Registered
Join Date: Apr 2008
Location: TX
Posts: 95
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Poor Idle when cold
My car idles really low maybe at around 500 rpm when cold and as it warms up it comes to a normal 900-1000 what could be happening?
It also has a lot of gas smell when starting I have a freshly rebuilt stock WUR |
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03-14-2012, 10:26 PM
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Two thoughts.
You really need to verify your cold pressure. This requires specific gauges /fittings. Also you need to check your auxiliary air valve is working - ie is opening when the vehicle is cold. This lest the extra air in your engine may be looking for. Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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03-14-2012, 10:46 PM
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Tinkering Pays!!
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Like Alan said: AAV valve...
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LIVN80S - - Red '79 Porsche 930 Steel Slant Nose Conversion [in 1987] w. 46k miles 3.3L; 964 Cams; K27HF @ 1.0 BAR, with Garrettson Intercooler; Rarly Zork; CIS Flowtech Fuel Head & BL-WUR. |
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03-15-2012, 05:01 AM
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what year is your car and Is your car stock and does it have any of the smog stuff on it , and do you have a dual vacuum distributor, I had the same problem as did J930 here on pelican and I was able to help him out on this subject, Your WUR and AAV may fine, Let me what we are working with first an if you have a pic of your engine bay would help,
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1986 944 turbo -first car 1997 993 Cab 6 speed-sold 1992 964 C2 turbo SOLD, 911GT ,CIS, 428 fwhp 450 trq, Carrillo rods, 964 cams, TT retainers,7.5 comp 1.1 bar boost 320 ml black fuel head 009 injectors, 044 pumps, 60-1 T4/T3 dual scroll turbo |
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03-15-2012, 05:10 AM
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Registered
Join Date: Apr 2008
Location: TX
Posts: 95
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Quote:
Last edited by JGC930; 03-15-2012 at 08:47 AM.. |
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03-15-2012, 08:44 AM
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Crotchety Old Bastard
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Jose, before replacing parts you should verify function.
- Verify the voltage getting to both WUR and AAR. - Remove the AAR, note % open, place in refrigerator and again note % open. - Put gages on CIS and verify cold pressure and system pressure are in spec. - Verify no vacuum leaks. - Verify the cold start injector is not leaking. I assume it is hot where you are. If the cold pressure is a touch low or the CSI is leaking you will have these symptoms. AAR malfunction will reduce idle but not cause rich smell.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 Last edited by RarlyL8; 03-15-2012 at 06:37 PM.. Reason: spelling |
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03-15-2012, 10:17 AM
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Porsche 930
Ford Truck
Blackbird
78 Porsche 911SC 3.0L, 3.3Turbo soon. 
