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the cars running perfect yesterday, today i start it and it wont idle took it around the block it sounds like its loading up till you just touch the gas and then it wonts to throw you back in the seat, what happened i checked the float levels and fuel just at the bottom of the sight holes. :CRY:
Vacuum leak, maybe..........:eek: :eek: :eek:
also before after she was warm you just turn the key and shed fire right up now you can turn the key as long as you want and she wont start looks to me like im giving quarter throttle to keep it running and if you ring the throttle down a bit sounds like shes running on seven cylinders, i checked all hose connections every things still the way it was i havent touched anything on the motor except for cleaning
Cleaning?? With water? Did you spray it? I that's all you did, I would look for wet wires or distributor.
Yup. that could be. Check for moisture under the dist. cap.
no water just a dry towel why do i have to pump the gas one time when shes warm and i never did before im going nuts guys, i have three car shows this weekend help
i respect all you guys help. im going to call holly tech line tomarrow , i think somethings restricting fuel at idle, if some ones had a simular problem and found the problem please let me know..thanks
If it's not water,,,,,, if it wants to die at idle, but runs when you give it gas, i'd say check for vacuum leak. Maybe a vac hose cracked or got pulled off ??:eek: It's the easiest thing to rule out first. Spray some ether around suspect areas while it's running. If there's a leak the rpm will change when you spray it.
Might be dirt in the carb (Like the idle circut maybe) hard to tell with a keyboard. :o
i diagnose cars all the time with a keyboard at work.... then again they're on the smog machine :LOL:Quote:
Originally Posted by pro70z28
First thing I'd check is the power valve.
Maybe a bad or loose plug wire??? Like Pro said, kinda hard to tell with just a keyboard. Whatever you find out, please let us know.
Good Luck,
Dutch
ill do the ether check, and anything else i can , ill let yas no , thanks everyone
what is the purpose of the power valve? how do you know if its bad? im not sure
holly e mailed me back and said it sounds like a bad power valve ill purchase one today and see
You've probably got a grain of sand or similar stuck in the needle valve.
Since you're running a Holley, checking is easy.
Pull the needle valves one at a time - it's probably the primary - and see if the needle is off the seat.
If so, spray it with water from a hose while shaking it.
Once it seats ok, reinstall.
If you haven't pulled a Holley needle valve, be aware that the hex nut is the adjuster and the slotted screw head is the lock bolt.
Unscrew the lock bolt with a screwdriver then spin the needle valve out with the hex.
After the lock bolt is loose, you can usually spin the needle valve out with your fingers.
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.
Quote:
Originally Posted by 383 chev
Nah....Holley's hold their tune 4 ever......really.....:LOL:
:LOL: we must have two different holley companies then HUH!:LOL:
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
Believe me, I know EXACTLY what you mean. That's why I run edelbrocks now.Quote:
Originally Posted by S19243H
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
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.Quote:
Originally Posted by S19243H
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.
Not if you know how to adjust one, they'll run rings around any Carter or Edelbrock ever built.Quote:
Originally Posted by S19243H
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. :eek:
what am i missin here cause for sure i would not shell out that kinda doe for the biggest pieces of shit ever built.Quote:
Originally Posted by S19243H
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