Wierd Sound from carb

Goose

Well follow the steps to figure out what is causing it. first pull a plug wire at a time if it makes no difference in how the engine is idling/the noise then put it back on and move to the next.. when oyu locate the cyl that is missing pull the plug and look for mechanical damage.. then pull the valvecover and check the mechanicals (rockers too tight, pushrod bent etc.. ) Something is either causing the plug to fire when the intake valve is open, or the valve to not close completly..

fifesjeep

It's never a good idea to look down the carb while revving it... On the other hand, Nothing beats a good laugh, especially seeing a grown man screaming and running around with a head of fire will most likely get me chuckling a little bit... =D>

Goose

It's never a good idea to look down the carb while revving it... On the other hand, Nothing beats a good laugh, especially seeing a grown man screaming and running around with a head of fire will most likely get me chuckling a little bit...

Heh Heh. yahh! you betcha! almost as funny as that video clip of that D/A that does the flaming shot and spews fire everywhere. (someone here has that clip as an avatar..)

woodfar51

This is old school but if you take a spray bottle with engine running and spray a little water into carb it will break the carbon loose.

woodfar51

This is old school but if you take a spray bottle with engine running and spray a little water into carb it will break the carbon loose.

Rhinolined360

I dont know if you said, but what kind of carb is it, I know Holley has issues with truck avenger series carb when it first came out.

JFlanny11

Edelbrock Performer 650

ironman_gq

could it be a backfire through the carb? I had a buddy with a 258 that did that and another one that had a bad miss that made a very strange chugging/whack sound. you can check for bad valves with a compression tester and some oil. I would think it is a bad valve. could be bent or sticking or it could be a pushrod.

JFlanny11

Well Now that I actually had time to go out and pull the valve covers. The cause of the sound because very evident! A Pushrod Blew right through one of the rockers. Awsome

Goose

coool, glad it was somethimg easy..

tufcj

I wouldn't exactly say something easy. There had to be a cause. Those factory rockers should go 100K easily. Questions: :-| High mileage? Oiling problem (blocked pushrod or bad lifter)? Too much cam lift (valve spring binding or retainer hitting guide)? Make sure everything is working right before just bolting a new one on and driving away. Next time, damage may be worse. #-o Bob tufcj

ironman_gq

I saw that on a Chevy 383 once. the pushrod wore a hole right through the rocker. see if you have any coil bind or check your spring pressure.

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