Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor
idle help
Cliff Ruggles:
I was hoping it would be something that simple like the PCV plugged into one of the runners and not into the carb to be evenly distributed to all cylinders.
A few years ago my engine developed a slight miss at idle and low RPM's. Started idling rough as well. I isolated the troubled cylinder by removing one spark plug wire at a time from the HEI until I got little to no change. Coincidentally it was the #2 cylinder.
At that point I replaced the plug and wire, no improvement. Then I did a compression test and it was same as all the other cylinders.
Hum? So I removed the intake and replaced the intake gaskets and it corrected the issue. Good thing that I did because the gaskets were failing everyplace. They were the grey paper type gaskets. I replaced them with the Felpro blue variety with the metal reinforced centers and material bonded to both sides and haven't had any issues since......
73ss:
Thoughts on this? I don't like the way the plug is slightly recessed. I noticed this while assembling the motor and sent some pics to Brodix and they said it would be fine. This is the correct NGK plug that Brodix lists for this head. Could this have something to do with why this motor needs so much lead? I would think that the plug should be at least flush with the head opposite side of the valves.
I finally figured out how to re-size images!!! ;D
old cars:
There called extended tip spark plugs.
old cars:
pics
73ss:
--- Quote from: old cars on July 21, 2021, 10:00:30 AM ---There called extended tip spark plugs.
--- End quote ---
Thank you for the info. I did some research and decided upon an autolite 3924, extended tip. Installed a few and rotated motor over with no interference. Edelbrock & Trick flow both list the 3924 for their BB oval port heads. It didn't make any difference on the amount of timing lead that it needs, but I'll be curious to see if the #2 plug stays clean.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version