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Old 08-13-2008, 11:04 AM
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Really Cold Blooded

My car has a Chevy 350 crate engine with an Edelbrock 4bbl. carb. In the mornings it starts and idles just fine, but it has a habit of cutting out or stumbling on light acceleration until completely warm. Afterwards, it runs just fine. I recently had some suspension work done on it and the guy who did it adjusted the electric choke slightly and made some minor adjustments to the mixture screws. Now the problem is worse. It still starts fine and idles OK, but the stumble under light acceleration is more pronounced and now it also backfires through the carb. and exhaust until completely warm. I'd like to take it to a shop that specializes in carbureted cars, but I'm hesitant to leave it overnight as this problem only occurrs after a cold start. It's been a long time since I've worked on carbureted cars, but I'll get back into it if I have a sense of direction before starting. Based on my limited knowledge, I'm convinced this is a carburetor problem, but I wouldn't rule anything out. Since this is essentially a cold start problem, could the ignition (i.e. the timng) also be part of the problem? Once the car has been started and run for a while it runs great other than a very slight shudder under light throttle inputs.
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