Re: Chasing Rough idle...compression?

Posted by Mike On 2011/5/26 9:27:46

The old spray mist of water over the ignition wires and watch for the electric glow trick? Worth a try, even quicker than playing with the clothespins.


PackardV8:

Perhaps, but keep in mind that most makes used the same carbs and idle settings for an entire v8 line up. One carb number with the same jets throughout would be listed for a 350-455. Again, i don't think that's the most efficient way to get the most power and mpg out of your car, but they did at least idle ok and ran good that way from the factory.

I took the 2bbl carb from my 4 cyl 153 chevy boat and put it on my 2bbl 350 truck motor once to test some issues i was chasing. It ran so good i left it for the rest of the season. Plugs perfect color and all.

Now, again, i know my experience with V8's may not translate, but i would suspect jet issues to be evident with part throttle cruising, WOT, and higher speed breathing and power. But for the idle circuit, i would really feel that almost any carb from a motor type and size remotely close would idle well, especially with being able to adjust the idle mixture screws to fine tune.

It's something to think about though, i'll call the carb shop and ask if that's something to consider. Get all my info before i get the car out and start troubleshooting again.