so as im trying to sort out the new setup im noticing that under breaking the carb is flooding out.... and if i smack the brakes from a good speed it'll just cut the motor out. what might this be? float set too high?

waiting for the truck to cool so i can take a plug reading.....

also, for anyone who has run a holley on a 22r before, what fuel pump is suggested? i think my fuel pump (universal 5-9psi) is not flowing enough fuel and is cutting out at around 5000rpm...

 

Your on the right track....
I would start with checking the float adjustment, the Holley should be happy with 4-5psi, more could also cause flooding.

What combo you running? 2 or 4bbl

 

its a 500cmf 2bbl. running into a offy single plane intake. waiting for stuff to cool a bit for me to check the sight hole and see where its at....

 

I used to run the 500 on mine with the S/C, I finally swapped it out for an Edelbrock 500 4bbl, the Holley was fine but the 4bbl was much more user friendly in my application except in fuel economy, actually neither was very economical, but I,m still working on that part.

 

so i reset the float and its still getting flooded........ whent through and looked around online, looks like there was a piece of foam that was supposed to have gone in the middle between the metering block and the carb body in order to prevent fuel slosh ....im wondering if this may be my issue since mine didnt come with one and so i have none in there.......?

 

I doubt the foam not being there is causing the problem, I eliminated it on mine just so I didn't have something in there that might breakdown and plug something up later down the road and never had any issues.
Is the flooding happening at idle, normal driving, or just under braking, if just at braking is it possible somethings up with the brake booster and your getting a major vacuum leak when the brake pedal is pressed?
Hows the power valve?

 

just under breaking.... essentially anything too hard will cause it to flood over since i can prevent it from dying by gassing it just slightly and i can hear it gurgguling under the fuel spilling over. i doubt its a vaccume leak....... although i havent tried it i know it wont flood over if i smack the brakes in reverse...

power valve ive yet to check....

 

Thats a strange one, the flooding? the fuels coming out of the vent tube when it does it? The float level is set correctly, just trickling over the sight plug edge at idle? the float is OK, not leaking and sinking in the bowl? power valve again, excess fuel pressure blowing the needle open? I would double check all those items again just to make sure. Its a 4412 model carb with the center hung bowl, or a side hung bowl? not that it really matters but the float pivots different between the two.

 

if you are running too rich, suddenly closing the throttle with cause it to bog and even die. Have you tried driving it hard putting the clutch in and just coasting real rappidly? Like acting like you are going to shift real quick and then just never touching the gas? IF it stalls I say either smaller jets or tune back the carb a lil

 

yeah....... checked it and checked it again. float is right where it should be. im gonna try and check it on a known flat piece of concrete slab to make sure its dead even and set there. i took into account my truck sits at a rake and figured it evened out with the slight incline of the driveway so imma just try a lower setting on the bowl tomorrow see if this renders any results. i also tried extending the chimney vent with a rubber hose and still flooded out when i hit the brakes too hard.

if i cant find a solution ill pull the bowl also and check things out internally. yes its a 4412, center hung float.

havent tried that yet but i dont think it does it since ive likely done that already. i looked at the plugs today to take a general reading and they are actually right on the money shade brown so.....

 

PCV valve hooked up? Where is the vacuum port for the brakes on that manifold? #4 port or centered under the carb?

 

pcv is not hooked up...... i have it open to the engine bay.....

the brake vaccume port is into the number 4/3 runner...... im starting to wonder also if this could be an issue taking too much vaccume out from the back 2 cylinders and making thye vaccume inside the manifold uneven??

 

Ok, so the PCV is out of the picture now.

Does the carb have a fast idle adjustment? It's the idle screw for the choke plate? Electric choke?

#3/4 runner should be fine...

 

float needle i'm assuming. this happened to me. when i adjusted the float, a piece of the gasket thats under the adjusting bolt went in the carb and held the needle open.

 

yea....pcv gone. manual choke. its got the fast idle mixture screws at each end of the carb. but the idle mix is just perfect, not rich or lean at all.... the issue im gonna venture is gonna be the seat... somethin is goin on. i eliminated the FPR since the pump sits at a steady 6-7 psi. however im thinking that the fuel line may be getting pressured under breaking from the gas tank???? not sure but im gonna upgrade to an internal fuel pressure gauge since having it in the engine bay is not helping me monitor it very well when driving to see what its doing.

yea..... gonna tear into it tomorrow and inspect everything make sure nothing is keeping it from seating properly as well as the power valve. thanks

 

so after some investigation, i found out i had a #50 power valve in the carb, so i replaced it according to holley's recomendation (reading 17 in. of vacuum divided by half needing a #85 power valve) should have sorted out the hesitation issue.

now, the truck cuts out when i hit the gas unless i back off quickly so it dont cut out..... WTF?!?!

any insight guys?

 

Should kept the sidedrafts....

 

to be honest......... it didnt pull nearly as hard with the side drafts as it did with the holley...... (when its up top anyways)

 

That's cool, I know mine pulls up top with the sides..

Hope you figure out them bugs bro...

 

What happens if you set your fuel pressure down about 4-5? I've always set my regulator on my EFI-carb swapped dodge with a 4bbl to about 5.5/lbs. You might just have too much volume and the pressure from the fuel is pushing the float bowl fill needle off its seat and overflowing out of the carb.

And it sounds like with their recommended power valve it threw off your other settings, so you might have to rejet and retune things. Carbs can be a hassle for sure, but once they are set, there shouldn't be much changes needed. If you could actually keep one setup in the truck long enough for that theory anyways