Edlebrock carb question

[SilverLakeYfz]

Well i cleaned and rebuild my edlebrock 1405 since it sat with old gas in it for a while. Put new floats in and adjusted them. New metering jets nd stuff. Well now it fires up a lot better and sits and idles with the choke on a lot better than before. Only problem is it wont idle off choke. Never would idle before even with choke so its gotten better since rebuild, just may need tuned. Looking for insight so when it finally gets warmer i can tune it. Also when idling on choke it will pop out of the exhaust every once awhile.

 

[Swims350]

first the idle speed most likely needs setup higher to make it idle. it's on the side where the throttle cable hooks and the screw faces the front of the truck with a spring around it, it's like a 1/4 head with a flat blade screwdrive slot in it.

then...


you need to turn the mixture screws on the front in until it stumbles and then out to max rpms. or with a vac. gaguge turn them otut to get the highest vacuum number.

 

[fallguy]

Edelbrock

Well i cleaned and rebuild my edlebrock 1405 since it sat with old gas in it for a while. Put new floats in and adjusted them. New metering jets nd stuff. Well now it fires up a lot better and sits and idles with the choke on a lot better than before. Only problem is it wont idle off choke. Never would idle before even with choke so its gotten better since rebuild, just may need tuned. Looking for insight so when it finally gets warmer i can tune it. Also when idling on choke it will pop out of the exhaust every once awhile.

Are your metering rods & helper springs correct for your application? Edelbrock tech support is TOP NOTCH with helping find the right parts. Also, turn in both front set screws all the way in (one at a time), then back out 3-4 turns (make sure you go slow & count right. Mine's right at 3 1/2.

 

[Swims350]

that's only a good initial setting, fine tuning should be done with a vac. gauge or at least a tach to get them as good as can be. vac. would be best, most vac. is perfect setting.

 

[supercharged]

How well did you really clean it out ?

Pull it off and really clean it out.

Just my opinion ,the **** gas we get these days,with all the ethonol and crap it can't sit for more than 6 months before it turns to white crusty **** that clogs up jets.

Hummm

 

[crazy4offroad]

Take the top off and put compressed air on the primaries if you didnt when you cleaned it out. That is how you blow the goop out of the idle circuits. Then be sure to use a good paper element fuel filter, not one of those "cleanable screen" pieces of crap.

 

[HotRodPC]

Yep, my first guess will be there is a tiny idle circuit orfice that is gummed up. That is the #1 failure of these Eddys. They don't like trash or **** in them. Very important to clean the idle circuits and use a good inline filter. I like to use 2 inline filters. One before the fuel pump and 1 after.

Next would be Vac Leak.

And of course this is all assuming the idle screws are set right.

 

[89Suburban]

 

[SilverLakeYfz]

carb was completely torn down and put in the part washer. Venturi's sprayed out with carb cleaner and air. Im pretty sure i got all the other little ports and stuff sprayed wit carb cleaner and air. Only have the idle screws out 2 turns though. When it gets warmer ill have to try them screwed out to around 3 turns

 

[Swims350]

again that's ONLY a base line to start by, raise the idle speed then fine tune them as I described.

 

[SilverLakeYfz]

Ill give it a shot. Like I said Im only looking for insight right now so that when i go to work on it when it gets warm again ill know where to start my baselines. Havent rele got to run the motor since rebuilding the carb but from what i can tell it has gotten better since cleaning.