Q-Jet help -Fuel overflowing onto manifold?

[Hop-up]

I bought one of these - http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=350246175753&viewitem=&sspagename=STRK%3AMEWAX%3AIT#ht_1052wt_978

Ive used a rebuilt Qjet from him before, didn't have a problem.
Anyway, Here's the deal.

i had been driving for about 20 minutes around town, no WOT or anything like that. Once I get back into campus and let off, it goes down to idle speed (700RPM) and then stumbles, chokes, and stalls.

I get out and check, sure enough there was fuel spilling out onto the intake from the carb.

Obviously it was flooded...bad.

When I say flooded, I mean that when looking into the secondaries, there is a light pool of fuel on the butterflies.

My idle screws are turned 1.5 turns out. I really don't know much about Qjets, Ive been readin up on tuning but can't proceed until I can get it to at least idle! ( this is a new crate motor, too, so id like to get along with the breakin procedure)

Thanks !

 

[BIG BROWN 79]

throw off the quadra-JUNK and put an edelbrock on!!!

 

[ryoken]

it'll be coming out the vent tube.. could be the needle stuck off the seat.. but more than likely it's in the float, either adjusted wrong, or more likely, stuck...

try wrapping on the top plate with a screw driver handle to free up the float..

 

[ryoken]

throw off the quadra-JUNK and put an edelbrock on!!!

gee, trade the best offroad carb ever for a rebadged Carter, no thanks...

 

[Big Ray]

it'll be coming out the vent tube.. Could be the needle stuck off the seat.. But more than likely it's in the float, either adjusted wrong, or more likely, stuck...

Try wrapping on the top plate with a screw driver handle to free up the float..

+1...

 

[Thunder]

throw off the quadra-JUNK and put an edelbrock on!!!

Wrong answer! I really doubt you will find many here that agree with you.

As said you have a stuck float or needle and seat issue.. Get it fixed ASAP. You dont want to break in a new engine with a over rich fuel mixture.

 

[Hop-up]

Ok.

I brought the Carb into the dorm, pulled it apart.

The top of the float is set to 1/2", as in a 1/2" space between the top of the float and the bowl.

Everything LOOKS clean. Should I just spray it all off and try again?

Also I have a question about my secondary butterflies. There is a lever that opens them on the lower passenger side. There should be something touching this lever, right?? As in to open the butterflies at WOT? Well, there aint! there is nothing actuating them.

 

[ryoken]

the float would have been stuck down.... check the operation of the float and needle, manually.. make sure it isn't hanging up anywhere.. and that the needle is moving up and down in the bore and seating....

sometimes people put that needle hangar, that clips on the end of the float so it goes from one hole, over to the other hole.. sometimes this causes the needle to hang up in the bore... it's best to have the hangar come thru one hole, than "sit on the flat" section of the float arm...

secondaries are vacuum controlled...

 

[Big Ray]

Here's an excellent how to...linky

float adjustment is on page 4

 

[Big Ray]

re the butterflys.

the unique thing about the q-jet is the air valve, which most folks confuese for the butterflys.

the secondarys are vacuum operated...

 

[Kenny78]

Check how the needle is attached. If it doesnt want to fall off easily it aint on there right. The clip hangs on the little nub. Not thru the two little holes. If I understand right, that lever your refferring to is the secondary lockout activated by the movement of the choke mechanism. Move the choke to the full off and see if it unlocks to allow the throttle to move the secondaries.

 

[Hop-up]

Ok, Well the clip wasn't passing through either hole. It was just slipped over the back and setting on the flat part of the float arm. So it's best to sit there still or to pass through one hole and sit there?

Vacuum operated, check. Should have realized that.

On the primary piston and rods, is it common to hit the rubber seal/carb body around the piston with a flathead screwdriver, to keep it from coming out? The little keeper seal is damaged, almost cut, from the screwdriver.

 

[Kenny78]

Shouldnt be cut, but also shouldnt cause flooding. Doug Roes book says to hook it over the bump. At least I think, Ill double check

 

[Hop-up]

OK well i got it cleaned and put back on. Cleaned the plugs off, they were nastyblack.

Im thinking maybe the float could have stuck while coming to idle after hard acceleration?

The lower spring for the accelerator pump is contorted, like not a well wound coil - it all cockeyed and weird. As if someone took and stretched it out and twisted it. Could this pose a problem for the over flow?

 

[jms]

I've once had a mild flooding problem (nothing as severe as you described, but gas on the outside of the carb) due to a disintegrated accelerator pump gasket. You say the spring on the acc. pump is all weird (get a new one - rebuild kit) - how's the gasket?

...and float set at 1/2" (provided the measurement was taken correctly...) seems low...

 

[Kenny78]

Honestly, if you bought it rebuilt from those guys I would try customer service. They supposedly are great to deal with so they should jump thru thuer butts to fix this botched rebuild. One tip ill pass along. I rebuilt my first quad recently and didnt clean out one of the idle feeds good enough. In swapping carbs and disassembly, I unknowingly lost the filter bypass spring out. This allows unfiltered fuel all the time. A little spec of crud got in the needle/seat. This spring is behind the fuel filter(and check the plastic rim seal on the fuel inlet,

Good luck