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Author
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Topic: Won't Idle cold
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Stangcrzy
Journeyman Posts: 68
From: Whittier, Ca
Registered: Feb 2005
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posted 04-23-2006 11:16 AM
   
I have a 289 ci with a weiand hi tunnel ram intake with dual holley carbs # 9776 (450 cfm ea).I have to keep the rpm's up above 1200 to keep idle otherwise it will turn off. It idles fine when it warms up. I am about 2000 ft above sea level.
How do i adjust to idle when cold?
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Moneymaker
Administrator Posts: 28357
From: Lyons, IL, USA
Registered: May 99
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posted 04-23-2006 06:31 PM
Do the carbs have power valves?
If so what size?
It may be too lean when cold.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Stangcrzy
Journeyman Posts: 68
From: Whittier, Ca
Registered: Feb 2005
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posted 04-23-2006 09:26 PM
Thanks Alex for the reply. I will ck on that and reply my findings.
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Blacksmith
Gearhead Posts: 278
From: Front Royal, Va., USA
Registered: Feb 2006
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posted 04-24-2006 01:59 PM
Manual or electric choke?
Choke adjustment may be in order, same thing on my Holley 600. Electric choke adjusted forward & she runs perfect now when cold.
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buening
Gearhead Posts: 256
From: Decatur, IL
Registered: Mar 2005
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posted 04-25-2006 08:05 AM
Not sure if this is the case, but i couldn't get my edlebrock to idle anything under 1200rpms and it turned out to have the idle circuit plugged up. One of the primary boosters was plugged and was killing the idle circuit. Once the debris was removed it idled like a champ.------------------
1970 Grabber Blue Mach 1 H-code
1970 Fastback
2003 Torch Red Mustang
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DidgeyTrucker
Gearhead Posts: 1708
From: Greenbrier, TN USA
Registered: Oct 99
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posted 04-25-2006 10:29 PM
Cold motors like to run rich. That's why we have chokes. Your problem sounds normal.Tracy
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Stangcrzy
Journeyman Posts: 68
From: Whittier, Ca
Registered: Feb 2005
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posted 04-26-2006 06:58 PM
Motor idles great when warmed up about 1200-1400 rpm. But when I shut it off and let it cool for a little it does not want to idle, it stumbles lower on the rpm's than it will shut off. I will try to ck the power valves.
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jww_289
Journeyman Posts: 55
From: Victoria Australia
Registered: Feb 2006
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posted 04-26-2006 08:02 PM
I have my choke disconnected and that is normal operation, as the guys have asked "what is your choke set up and is it adjusted properly" ??
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Stangcrzy
Journeyman Posts: 68
From: Whittier, Ca
Registered: Feb 2005
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posted 04-26-2006 10:42 PM
There are not any choke plates. Model 9776
which I referenced to a 4160 model carb. Similiar to there carb 0-4224. see linkhttp://www.holley.com/0-4224.asp
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Hemikiller
Gearhead Posts: 684
From: Killingworth, CT
Registered: Feb 2002
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posted 04-27-2006 07:55 AM
quote:
Originally posted by DidgeyTrucker:
Cold motors like to run rich. That's why we have chokes. Your problem sounds normal.Tracy
Sounds pretty much normal to me too. If you've got a motor built to support that tunnel ran, driveability should not be a big concern.....
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TomP
Gearhead Posts: 6234
From: Delta BC Canada
Registered: Dec 99
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posted 04-28-2006 01:31 AM
I don't use chokes on anything, i just put up with it. What i do is warm the engine up a bit then shut it off for a few minutes to let the heat soak in. Usually i'll do that by shutting it off at the first red light. It'll idle fine after that.
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