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Discussion Starter · #1 ·
Here is the setup: 289, new edlebrock 2121 intake, new edlebrock 1406 carb(electric choke), new coil, new condensor, new points, new plug wire, new plugs, new fuel pump with the huge filter bowl.

problem1: when cold - it won't stay running without a lot of pumping on the accelerator.

problem2: at idle(when warmed up), it will start and run fine for approx. 45 seconds, then it dies if i don't start feeding it a lot of gas.....if it dies, it acts like it is flooded - big puff of smoke once it starts...

all help/advice will be greatly appreciated..

Randy


65 pony from ground up, inline 6 (son's car),
66 Red Convertible, 289(dad's car)
 

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Sounds to me like the float is not set up correctly. Return the carb or have someone who knows what they're doing set it up.

Someone please buy my Ski Doo!
68 fastback, 390 4V premium fuel
80 5.0 hatch, just finished
91 5.0 coupe, daily driver
84 RamCharger 4x4 extreme mudsliger and winter junker
 

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You've surmised you likely have a carb problem, yes?

Cold starts....how's the choke and fast idle cam operating...?

Warm flooding....possibly fuel pressure is overwhelming needle and seat and pushing fuel over into the main venturis (or the float is set too high).....opening the throttle keeps it from dying but I'll bet it still runs a bit rough....

That's a toughie since you'd think the fuel would spill over when cold too...

Can you take a peek down the carb when you are having the hot idle problem and see if any fuel is dribbling out of the booster venturis?....check both primary and secondary. You can check this only at idle...can't open the throttle.... also check for dribbling after the engine is shut off.

Post what you find out or describe any further developments...
BTW...did you adjust the curb idle mixture?

Pat
http://www.jps.net/binay/webdocs/strtmstng002_sml.JPG
 

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The cold start problem is symptomatic of no choke. I have this problem on my race car because thats the first thing that goes in the parts box is the choke on my race carbs. I have to pat the pedal a couple of times and then for cold start I go to the floor with the pedal. As soon as it fires I back it off to around 2000 rpms for a minute or 2 and then it will settle into an idle. Since fuel injected cars have a cold start routine you don't give it any pedal but for old carburated cars the norm is 2 pats and to the floor for cold start.

Maybe you just need to re-adjust your idle mixture. You want to set it with the motor completely warmed up and the choke fully open. Otherwise, it will be too lean when the motor is warm. Once it dies and you start footing it the accel pump will flood it for sure.

It could also be the floats and such like the guys said. I just thought I'd present another alternative that you can consider too.



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Discussion Starter · #5 ·
yes. i did adjust it... after warm up.... same results... i suspected it was a float adjustment, but since i just bought the carb - i figured i would just take it back to autozone... or do you think i should try to adjust it?

thanks

65 pony from ground up, inline 6 (son's car),
66 Red Convertible, 289(dad's car)
 

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If it's a brand new carb (as I suspect), I wouldn't mess with it.....have Autozone warranty it....if you start messing with it and break any of the factory seals, usually on screws, then you'll void the warranty....



Pat
http://www.jps.net/binay/webdocs/strtmstng002_sml.JPG
 
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Discussion Starter · #7 ·
as always - thanks a bunch for the advice.....

65 pony from ground up, inline 6 (son's car),
66 Red Convertible, 289(dad's car)
 
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