Holly Carb problem:

Started 78 Friday morning, backed out of garage and pulled to front yard- leaving the vet to Idle and warm-up I return to the garage to do some work on the 79. Minutes lated I realize that the 78 is not running, go turn off the key and return to garage. Friday evening go to put the 78 back in the garage &*(^%$) it will not idle at all. After getting it in the garage

 found it will only stay running above 2000 rpm. It ran fine this morning!

Checked fuel flow, removed, and blocked all vacuum lines (no change) maybe fouled plugs (plugs  Look Excellent) remove holly (shows no leak at intake)and replace the original rodchester (idles and runs perfect)

The holly is a realitively new carb but out of warrenty but it just won’t idle… what could/would Happen to cause this.

PS glad this didn’t happen during the last two weeks as I put 500 miles on it during cruis’n the coast>

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Annicorvette
Lifetime member # 35

Put the Q-Jet back on and use the Holley for a paperwieght,never liked them things

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C3VR Lifetime Member #93
 

Holleys are notorious for the needle valves failing.  I would check that first.  Next I would suspect a plugged idle circuit, but I don't think that would require 2000 RPM to overcome.  Just in case, rev the engine to about 4000 RPM, hold the throttle open, and slam the choke shut.  Open it just in time to keep from killing the engine.  Do it a few times.  The high vacuum of 4000 RPM can suck crud out of the passages.

And I agree with the suggestion to go back to the Qjet.  They are good carbs.

Larry

Larry, whenever I do stuff like that, people look at me like I'm NUTZ!! Glad to see I'm not the ONLY one...

I agree tho...prolly got some doo-doo up in there. Happens all the friggin time....I also agree with keepin the Quadrapuke...but that's just me...

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Joel Adams
C3VR Lifetime Member #56    
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

[QUOTE=VetteSpecialties]Holleys are notorious for the needle valves failing.  I would check that first.  Next I would suspect a plugged idle circuit, but I don't think that would require 2000 RPM to overcome.  Just in case, rev the engine to about 4000 RPM, hold the throttle open, and slam the choke shut.  Open it just in time to keep from killing the engine.  Do it a few times.  The high vacuum of 4000 RPM can suck crud out of the passages.

And I agree with the suggestion to go back to the Qjet.  They are good carbs.

Larry
[/QUOTE]

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Annicorvette
Lifetime member # 35

When your vette is stalling out is there black smoke coming out the tailpipes? It could be flooding, you can try and take a hammer and lightly tap on the top to free up the possible dirt in the needle. If not use the hammer hard then remove and Q-jet it.

[QUOTE=acplus]When your vette is stalling out is there black smoke coming out the tailpipes? It could be flooding, you can try and take a hammer and lightly tap on the top to free up the possible dirt in the needle. If not use the hammer hard then remove and Q-jet it. [/QUOTE] Tried the light tap hammer thingy (must need a bigger hammer)

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Annicorvette
Lifetime member # 35

Maybe

It good to hear someone else besides me uses the high RPM choke trick.  Done it for years.  Soak it with a bit of carb cleaner first.

Yep...that trick really sucks...
The real trick is timing it so the engine doesn't completely bog down and die...makes it hard to re-start...
Also, for anyone contemplating this old timers trick, DO NOT put your face over the carb while doing this......don't ask...

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

The saga continues. yesterday had an early morning dr appointment and then took the holly apart (i like to know what is wrong and what parts i need before going to the parts stores) first took off the primary side bowl and inspection looked fine next took off the metering circuit (even before it was completely removed) OH S**t trash was falling out everywhere. removed the metering circuit there was metal trash as large as 1/2" by 3/4" and as small as a bb every where the channel inside had their coating falling off (no rebuid of this). took the metering block to several places that rebuild carb to see if they had an extra metering block they would sell (no luck) all said the had never seen anthing like this even on carbs that had set in salt water) finally went back to where i purchased it and they called holly and spoke to a service rep (woody) and he told them to have me put it back together and send it to them and as soon as he receives it he would pull a new one off the shelf and send it to my location. if everthing goes well i will ups the carb today and have a new carb installed by next weekend.

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Annicorvette
Lifetime member # 35

I have seen some of the surface coatings flake off on Holleys in the past...sometimes in large sheets like you describe.
Hope they do take care of it!

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

What kind of fuel are you using..........Nitromethane?.........makes for getting to the doctor's office pretty quickly

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Fuel could be an issue with the peeling inside.  Perhaps too much alcohol or octane booster.