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Registered
Join Date: Jun 2005
Location: East Coast USA
Posts: 144
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Easy question.....
Which direction do I turn the throttle body nut to lean the mixture? It's running a little rich...
Thanks
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-- 1969 Mercedes 280/8 114k miles [RETIRED]1985.5 944 NA just under 300k miles [RETIRED]1972 914/6 190k miles [RETIRED]1997 951 180k miles |
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02-20-2007, 10:35 AM
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Greasy Member
Join Date: Mar 2006
Location: Indiana
Posts: 1,457
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clockwise = richer
counter clockwise = leaner (edit- this is for the CO adjust on AFS) -Nick
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Owner: Bennington Motorsports www.benms.com Sponsor for Midwest Region 944-SPEC racing series -When was your timing belt changed or tensioned?? -Yes, I'm the crazy man that will loan out my 9201. Just PM me, I will add you to the list and get it out ASAP. |
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02-20-2007, 10:50 AM
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Registered
Join Date: Jun 2005
Location: East Coast USA
Posts: 144
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is there any way to adjust the fuel delivery?
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-- 1969 Mercedes 280/8 114k miles [RETIRED]1985.5 944 NA just under 300k miles [RETIRED]1972 914/6 190k miles [RETIRED]1997 951 180k miles |
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02-20-2007, 11:00 AM
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Greasy Member
Join Date: Mar 2006
Location: Indiana
Posts: 1,457
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This screw adjusts the over-all air-fuel mixture. If you are trying to just lower the idle, there may me a little play on your throttle stop nut. However, make sure the throttle switch still clicks just as it opens.
-Nick
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Owner: Bennington Motorsports www.benms.com Sponsor for Midwest Region 944-SPEC racing series -When was your timing belt changed or tensioned?? -Yes, I'm the crazy man that will loan out my 9201. Just PM me, I will add you to the list and get it out ASAP. |
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02-20-2007, 11:06 AM
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Registered
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The bleed by screw on the AFS adjusts the idle mixture only. Once the baffle comes off of it's idle position the bleed by has no effect. The screw on the throttle body adjusts idle speed. The engine block temp sensor and the inlet air temp sensor and the O2 sensor contribute to the air/fuel mixture.
If the O2 sensor is not working or disconnected you will get a rich mixture. The real question is why do you think the mixture is rich?
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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02-20-2007, 12:09 PM
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Registered
Join Date: Jun 2005
Location: East Coast USA
Posts: 144
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because i unplugged the 02 sensor because it was running like crap with it in place lol
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-- 1969 Mercedes 280/8 114k miles [RETIRED]1985.5 944 NA just under 300k miles [RETIRED]1972 914/6 190k miles [RETIRED]1997 951 180k miles |
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02-20-2007, 12:13 PM
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That Guy
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I would advise against making adjustments to the AFR unless you have a wideband O2 sensor hooked up or a exhaust pipe sniffer.
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Jon 1988 Granite Green 911 3.4L 2005 Arctic Silver 996 GT3 Past worth mentioning - 1987 924S, 1987 944, 1988 944T with 5.7L LS1 |
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02-20-2007, 12:22 PM
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Registered
Join Date: Apr 2005
Location: Ontario, Canada
Posts: 4,554
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replace the o2 sensor.
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Kyle 2008 Mini Cooper // '83 Porsche 944 // '01 Mazda Protege [sold] // "Never break more than you fix!" - SoCal Driver |
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02-20-2007, 02:47 PM
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Registered
Join Date: Jun 2005
Location: East Coast USA
Posts: 144
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The chip I have ignores the O2 sensor completely, and in circuit, it acts "funny so I pulled it. The sensor itself was new before I chipped it...around 30k miles on it now, so 3/5 dead now anyway I guess
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-- 1969 Mercedes 280/8 114k miles [RETIRED]1985.5 944 NA just under 300k miles [RETIRED]1972 914/6 190k miles [RETIRED]1997 951 180k miles |
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02-21-2007, 03:27 AM
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1983 Porsche 944 2.5 liter
The Kraut Burner
The Bratwurst Burner
Das Boost
