squirell

Hi,
I installed a rebuilt q-jet by Holley on my 67 Cutlass 330/320 yesterday,
and the top secondary plates are not opening causing the secondarys to flood bogging down the engine.
All vacume lines are good.
Any ideas ?

66ninetyeightls

Doesn't Holley have a tech help line? I would be contacting them first before messing around with anything. Don't take a chance buggering up your warranty.

squirell

No warrenty,
It was given to me by a friend who bought it 4 yrs ago and never installed it.

Blk71SX

have you checked that the rear metering rods are seated in the jets? the top butterflies are spring loaded and can be adjusted

Oldsmaniac

I did not know that Holley sold a quadrajet rebuild carb but if it is that, the top "secondaries" is the air valve. if it does not open the secondary metering rods will not lift and no extra fuel will be delivered. If the carb is flooding your problem is elsewhere.

Blk71SX

Holley had/has a reman line of carbs of all manufacture. not sure they are still in business

silverriff

I had that problem on my q-jet. Turned out the airvalve spring on the passengers side was binding up. When I manually pushed open the valves they would creak like an old ship's hull. Couple of squirts of wd-40 cleared it right up.

OLD SKL 69

I agree, if that does not work, then the airvalve spring could be adjusted too tightly and needs to be readjusted.

squirell

Thanks for your replys.

I disconnected the clip that holds the top flaps of the secondarys closed and wiretied them wide open just to test it.
It loaded up ...sputtered for a few seconds.... and then ran like a raped ape.
I guess the loading up is due to the top flaps being wide open
(vs opening progessely).
At least now I know the problem still lies with the top butterflies being stuck closed.

So I guess if someone can explain to me about the airvalve springs ...thats the next step.

does anyone have a q-jet diagram to point out the airvalve spring and
rear metering rods ?

Warhead

No pictures, but look on the passenger side of the carb. Where the secondary shaft pivots on the passenger side, about 1/4 inch behind that is a slotted screw (that is your tension adjusting screw for the secondaries) for a small screwdriver.
DIRECTLY beneath that is a set screw for that screw. Using a hex head of .090 inches, loosen that set screw, and you can use a small screwdriver to loosen the tension on the secondary shaft. Start by loosening that to about 1/2 turn from full loose, and tighten your set screw.
You should have a choke pull off keeping the secondaries closed while engine vacuum is high.
Jim

squirell

Blk71sx and Oldsmaniac pretty much pegged it.
Ended up being the thing the metering rods hang off of.
It was bent up and not being engadged by the cam the lifts the metering rods in the center of the carb.
Car runs great now...thanks for your responses