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02-15-2003, 01:00 PM
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#1 |
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Registered User
Join Date: Feb 2001
Location: Winnipeg, MB, Canada
Posts: 73
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Rochester Quadra-Jet - Idles Too Fast
Just rebuilt my Quadra-Jet and now the minimum idle speed is about 900 RPM. Idle screw is backed all the way out. Choke fast idle not engaged.
Everything seemed to go back together OK with a new carb kit...Float level adjusted to spec., etc. Anyone have any idea what the problem could be? |
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02-15-2003, 01:20 PM
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#2 |
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Recovering Truck Driver
Join Date: Mar 2002
Location: Orleans, NE USA
Posts: 1,883
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Have you checked your timing? Maybe it was advanced a little to help make up for half plugged jets.
__________________
67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska |
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02-15-2003, 01:43 PM
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#3 |
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CCRider
Join Date: Feb 2000
Location: Olive Branch,MS,USA
Posts: 2,232
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Return spring? vacuum leak?
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72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS |
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02-15-2003, 04:50 PM
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#4 |
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Senior Member
Join Date: May 2001
Location: West Central Minnesota
Posts: 568
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My bet is on vacuum leak, probably the primary throttle shaft. Gunk builds up in there and them when you clean it up for a rebuild it allows air to get sucked in where the gunk used to be.
__________________
V-6....only GMC Trucks have it! 62 GMC W5000 NAPCO-V6 65 GMC 2500 NAPCO Panel-V6 66 GMC 1000-V6 66 GMC 1500-V6 67 GMC K1500-SBC (originally a KM-V6) 68 GMC C1500-V6 68 GMC C1500-V6 68 GMC Suburban C2500 70 Chevy K20-SBC 71 Chevy C30 Longhorn-SBC 72 GMC Suburban C1500-BBC 72 Chevy C10-SBC 72 GMC C5500-ToroFlow Diesel |
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