Re: Car surges on freeway driving

Posted by Owen_Dyneto On 2010/4/2 19:54:08

All together a different engine, but I had that annoying attribute with my 56 Caribbean for several years and also I thought it was an improperly functioning vacuum advance. Easy enough to check semiquantitatively if you have a hand vacuum pump and a timing light.

What ultimately solved it for me was increasing the carb main jet size a couple of thousands. The change made no measureable difference in the gas mileage. Carb float level might also be a good candidate to check out.