After having my 1965 396 rebuilt (original specs except hydraulic lifters), I am having trouble getting it to start and idle. The only way I can get it to start is by leaving my foot on the accelerator and then its only hit or miss after cranking it for what I know is way too long. When it starts it runs pretty well except for when I get anywhere close to idle- it dies abrubtly. Sometime when I am attempting to crank, it backfires out the carb with a flame (very impressive). Its not the original carb - its a rebuilt 3310 that ran fine earlier. I thought it was the carb so I tried another and the same excact same thing happened- only would start after pumping and cranking wide open. I am confident that the wires are not crossed and the TI is working correctly because it runs well at higher speeds. I was wondering if maybe I misadjusted the valves when putting it back together. Would an exhaust valve that is not fully closed cause this too happen. Any help or ideas appreciated.
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Re: C2 396 Idle/starting problems
Not sure what you exact problem is, however with backfires you mentioned the power valve in your Holley has to be ruptured. A Holley with a ruptured power valve will run at higher speeds when more fuel is required. A correctly tuned, timed, and properly operating carb on your 396 should provide a immediate start and run. -
Re: C2 396 Idle/starting problems
What procedure did you use to set the valves. An exhaust valve not fully seated would backfire thru the carb.Comment
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Re: C2 396 Idle/starting problems
Wayne,
The way I adjusted the valves was to turn the engine by hand until I observed the valves, both exhaust and intake, fully close and then to tighten down until snug plus an extra 1/4-1/2 turn. I guess I really need to get a compression gauge and check the pressure on each cylinder. I really thought it was the carb until the new one did the exact same thing which is why I think it must be something else. It also does not seem like it can be the TI since it runs well, but again I do not know that much about low speed TI problems. It seems to have good spark. Thanks for any help you can provide.... its extremely frustrating. MattComment
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