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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

carb issues

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Old Mar 26, 2008 | 01:24 PM
  #1  
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speedracer54729
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From: Marshfield WI
Exclamation carb issues

I recently rebuild my holley 4bbl i think it was a 4180 for the first time.lots of respect for all of you who can do it RIGHT. I am having issues with rough idle,back fireing. My floats are adjusted right no idea what my problem is??

If it helps I am running a stock intake with a 2in carb spacer cause the throttle linkage wont fit without the spacer.
 
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Old Mar 26, 2008 | 01:43 PM
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Did you check the powervalve?, backfire will kill one quick.
 
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Old Mar 26, 2008 | 02:20 PM
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what is that please keep in mind i'm a virgen this was my first time
 
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Old Mar 26, 2008 | 03:18 PM
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This is a link to a 4180 page.
You'll see the powervalve half way down the page, comparing old to new style.
Make sure you have the right type of gasket for your Powervalve.

http://www.flemworld.com/Hto/CMod.html
 
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Old Mar 26, 2008 | 03:59 PM
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If your power valve is blown consider installing a protection device such as shown in this link: http://www.powervalveshield.com/ . Several companies make them including Holley and sometimes they show up on Ebay.
 
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