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Holley running EXTREMELY rich

Started by hemi68charger, March 19, 2024, 07:55:19 AM

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hemi68charger

March 19, 2024, 07:55:19 AM
Hey gang...

Car: 71 440 six pack Challenger RT
Situation: The motor is idling EXTREMELY rich, black smoke out the exhaust and running really rough at idle. The outboard carbs have been disconnected to eliminate them. None of the 3 carbs has fuel flowing out the booster ventures at idle which typically means high float level. Metering block fuel/air mixture screws only about 1 turn out. My gut says the new power valve from a basic rebuild kit is bad. The car was running fine earlier, so the ignition and timing haven't changed.
Troy
'69 Charger Daytona 440 auto 4.10 Dana ( now 426 HEMI )
'70 Superbird 426 Hemi auto: Lindsley Bonneville Salt Flat world record holder (220.2mph)
Houston Mopar Club Connection

69hemibeep

#1
March 19, 2024, 08:38:16 AM
Power valve

70 sublime

#2
March 19, 2024, 09:53:30 AM
Would a vacuum leak from a brake booster make it act like that ?
next project 70 Charger FJ5 green
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