Thread: deeply confused
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08-10-2008 03:50 PM #1
deeply confused
Hey everyone as the title said im stumped. I recently swapped my quadrajet for a holley and also swapped my points for an hei distributor. I thought i had it pretty well dialed in until i put the car in drive to take it around the block. When I put the car in drive and hold the brake I it idles really rough and im out of ideas. If it helps here is a photo.Attachment 32145
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08-10-2008 03:56 PM #2
Is it a square bore Holley??? What did you use for an adapter to the Q-jet manifold...Could be a big old vacuum leak....Yesterday is history, tomorrow is a mystery, Live for Today!
Carroll Shelby
Learning must be difficult for those who already know it all!!!!
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08-10-2008 04:36 PM #3
Also what size and model holley did you swap it with?
Live everyday like it were your last, someday it will be.
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08-10-2008 06:30 PM #4
its a 650cfm sitting on a edlebrock performer intake I didn't need an adapter the intake had two mounting locations for the rochester or holley and what is a square bore?
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08-10-2008 06:37 PM #5
square bore is all four holes the same size.... Anyway, sounds like things are matched up correctly, did you check for vacuum leaks at the base of the carb and around the intake gaskets? What do you have the timing and idle speed set at??? Have you adjusted the mixture screws???Yesterday is history, tomorrow is a mystery, Live for Today!
Carroll Shelby
Learning must be difficult for those who already know it all!!!!
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08-10-2008 08:30 PM #6
I personally believe that you need a spacer to mate the square bore Holley to the spread bore manifold, but don't take my word for it. Call the Holley tech line and explain your problem and I believe they'll be able to solve it.Ken Thomas
NoT FaDe AwaY and the music didn't die
The simplest road is usually the last one sought
Wild Willie & AA/FA's The greatest show in drag racing
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08-10-2008 09:22 PM #7
I have it timed to ear I've got the mixture screws backed out 1 1/2 turns, how would i go about checking for vacuum leaks at the base I do have a vacuum gauge.
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08-11-2008 06:23 AM #8
I use a spray bottle of degreaser sprayed around the base of the carb and along the intake manifold gasket. If the RPM increases, you found your leak!
Another thing, I would suggest borrowing or buying a good timing light, much more accurate then by ear.....Yesterday is history, tomorrow is a mystery, Live for Today!
Carroll Shelby
Learning must be difficult for those who already know it all!!!!
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08-11-2008 05:54 PM #9
thanks for the tips do you happen to know what the vac pressure should be at the manifold
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08-11-2008 07:07 PM #10
If the engine is stock, probably around 17" or so, less if you are running a performance cam...Yesterday is history, tomorrow is a mystery, Live for Today!
Carroll Shelby
Learning must be difficult for those who already know it all!!!!
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08-11-2008 07:42 PM #11
hay croom if you go to home depot buy a cheap propane torch unscrew the tip and put a 3 ft peice of vacuum hose and clamp turn on the propane use the end of the hosse to find your leak the rpm will go up when you find the leak works great no mess ted
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08-11-2008 10:12 PM #12
Hey Ted Dehaan
Where you at in Whittier?
I'm at Mills and Broadway...
MM64Last edited by MrMopar64; 08-12-2008 at 09:28 PM.
"LIFE IS NOT A JOURNEY TO THE GRAVE WITH THE INTENTION OF ARRIVING SAFELY IN A PRETTY AND WELL PRESERVED BODY,
BUT RATHER TO SKID IN BROADSIDE,
THOROUGHLY USED UP, TOTALLY WORN OUT, AND LOUDLY PROCLAIMING:
WOW.... WHAT A RIDE !!!"
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08-12-2008 08:17 PM #13
I'm in mesa
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08-12-2008 08:18 PM #14
oh yeah thats in the profileLast edited by croom7401; 08-12-2008 at 08:22 PM.
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08-12-2008 08:21 PM #15
alma school and main
And a Happy Birthday Wish for Mr. Spears. Hope you can have a great one. :)
A little bird