Thread: wont idle all of a sudden

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is the carb new? did u back fire thru the carb? if u did u prolly blew the power valve. did u see if ur idle screws are where u adjusted them. cause i am having a prob at idle but my cork gaskets that keep the idle screws from vibrating in and out are junk so they are never where i put them after running it for awhile. and do remember timing and fuel delivery give same symtoms.

Originally Posted by 383 chev

is the carb new? did u back fire thru the carb? if u did u prolly blew the power valve. did u see if ur idle screws are where u adjusted them. cause i am having a prob at idle but my cork gaskets that keep the idle screws from vibrating in and out are junk so they are never where i put them after running it for awhile. and do remember timing and fuel delivery give same symtoms.

Nah....Holley's hold their tune 4 ever......really.....

we must have two different holley companies then HUH!

thats not what im thinkin hollys are the biggest piece of shit ever built imo i have problems with everyone i ever owned. i put the new power valve in it and atleast it idles know but i give it throttle it misses and farts and blowssmoke like its loading upand then smooths out again/. i sprayed ether all around the intake and the damn thing and nothing ,my idle screws wont even adjust anymore. i can turn them all the way in and it still idles ,i boughtrand new this carb a year ago brand new. and everything adjusted fine then dont look like theres no show tonite$@#%&^%$#@$%*&^%$ piece of crap

timings 12 and 34 fuel pressures 5.5 vacuum 17 at 800

Originally Posted by S19243H

thats not what im thinkin hollys are the biggest piece of shit ever built imo i have problems with everyone i ever owned.

Believe me, I know EXACTLY what you mean. That's why I run edelbrocks now.

Like I said before in another thread, maybe it's just a limitation of mine; but, I have never owned a Holley that I could tune so that it held it for much more than about 9-12 months. It always happened all of a sudden and they were running either way to lean and starving, way to rich and belching black smoke, or the power valve would fail etc.

The nicest thing about banging your head against a brick wall is that it feels good when you stop.

Cheers,
Dutch

wanted edelbrock 650 or 750

Originally Posted by S19243H

what is the purpose of the power valve? how do you know if its bad? im not sure

The power valve is simply a "switch" that opens at a predetermined manifold vacuum, measured in inches of mercury (Hg). A vacuum passage in the throttle body transmits manifold vacuum to a chamber in the main body. When manifold vacuum drops, a spring opens a power valve in this chamber to admit extra fuel. This fuel flows through the power valve, through the power-valve channel restriction and into the main well. There it joins the fuel flow in the main metering system to enrich the mixture.
If the power valve is blown it can result in a very rich condition at idle.
Most of this information came from the Holley Carburetir Handbook by Mike Urich. If you're going to work on a Holley I highly suggest you get a copy of this book or one like it.

This is the book I'm refering to.

Originally Posted by S19243H

thats not what im thinkin hollys are the biggest piece of shit ever built imo i have problems with everyone i ever owned. i put the new power valve in it and atleast it idles know but i give it throttle it misses and farts and blowssmoke like its loading upand then smooths out again/. i sprayed ether all around the intake and the damn thing and nothing ,my idle screws wont even adjust anymore. i can turn them all the way in and it still idles ,i boughtrand new this carb a year ago brand new. and everything adjusted fine then dont look like theres no show tonite$@#%&^%$#@$%*&^%$ piece of crap

Not if you know how to adjust one, they'll run rings around any Carter or Edelbrock ever built.

I usta' run Holley's on all my stuff. Never had any issues with them once I got the right jets in 'em. Maybe I was lucky.

Originally Posted by S19243H

thats not what im thinkin hollys are the biggest piece of shit ever built imo i have problems with everyone i ever owned. i put the new power valve in it and atleast it idles know but i give it throttle it misses and farts and blowssmoke like its loading upand then smooths out again/. i sprayed ether all around the intake and the damn thing and nothing ,my idle screws wont even adjust anymore. i can turn them all the way in and it still idles ,i boughtrand new this carb a year ago brand new. and everything adjusted fine then dont look like theres no show tonite$@#%&^%$#@$%*&^%$ piece of crap

what am i missin here cause for sure i would not shell out that kinda doe for the biggest pieces of shit ever built.

went and bought a brand new elde today .. after talking to a couple other people who complained about hollys doing the same thing as mine did ,they bought the eldes and never had a problem since ill let you know what happens

went and bought a brand new elde today .. after talking to a couple other people who complained about hollys doing the same thing as mine did ,they bought the eldes and never had a problem since ill let you know what happens