454. Mild build-049 heads 278 xtreme marine cam. 10.5 compression, New 850DP Holley as of last July. Toward the end of the season I started noticing the idle getting worse and worse, didn't look into it cause I didn't want to bother at the time.

Took it out today and it kept dying after I would slowly left off the gas after cruising. Other thing it does is when it idles it does so sporadically, every time I start it, it will idle at a different rpm and sound different. If I give it gas real quick it will hesitate and cut out.

I'm thinking its a vacuum leak..any other ideas?

Thanks 

MSD Streetfire HEI. I know its not the best but the weight don't seem to bind at all every time I test them.

Spray and  even sure your air bleeds are clear

If I give it gas real quick it will hesitate and cut out.

I'm thinking its a vacuum leak..any other ideas?

Thanks

Check the accelerator pumps.


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Make sure they're both squirting properly.. If not, that would definitely cause your hesitation on acceleration


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