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Car wants to die when it idles.

Started by Harlow, November 07, 2007, 12:02:42 AM

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Harlow

November 07, 2007, 12:02:42 AM
This suddenly started happening. The car is hard to start up and wants to die while idling in gear. Once I start moving everything is fine and seems normal, but if I have to slow to a stop again it wants to die once it reaches idle. Where should I start? Could there be something wrong with the idle mixture metering? I've got a 750 edelbrock on the car right now. It'll only die or have these symptoms if its idling under load, if its out of gear its fine.

Hot_Rodder

#1
November 07, 2007, 12:11:08 AM
It could be flooding, any smell of a rich condition, or black smoke, bunch of soot around tag area?

firefighter3931

#2
November 07, 2007, 12:14:48 AM
The idle circuit on an edelbrock carb is not designed for a low vacuum situation. You need to swap the cam or use a more performance oriented carburator. I know you're in luv with that cam so :

The holley HP series with 4 corner idle is what i would be using with a severely overcammed 383.  :Twocents:


Ron
68 Charger R/T "Black Pig" Street/Strip bruiser, 70 Charger R/T 440-6bbl Cruiser. Firecore ignition  authorized dealer ; contact me with your needs

Harlow

#3
November 07, 2007, 12:28:09 AM
I'm getting about 12.5-13" of vacuum at idle. I do notice that that the exhaust smells rich at idle. Could it be a stuck float?

firefighter3931

#4
November 07, 2007, 12:34:41 AM
Quote from: Harlow on November 07, 2007, 12:28:09 AM
I do notice that that the exhaust smells rich at idle. Could it be a stuck float?


Float could be stuck or idle mixture is set too rich or your ignition system is weak.



Ron
68 Charger R/T "Black Pig" Street/Strip bruiser, 70 Charger R/T 440-6bbl Cruiser. Firecore ignition  authorized dealer ; contact me with your needs

Harlow

#5
November 07, 2007, 12:37:10 AM
I found that the air gap on my electronic distributor was too big so I re set it to .008. After I did this all these problems started. Do you think it could be generating a smaller/weaker spark with the smaller air gap? I'll try changing it and see if it helps as well as check the floats.

70charger_boy

#6
November 07, 2007, 01:28:28 AM
Quote from: Harlow on November 07, 2007, 12:37:10 AM
I found that the air gap on my electronic distributor was too big so I re set it to .008. After I did this all these problems started. Do you think it could be generating a smaller/weaker spark with the smaller air gap? I'll try changing it and see if it helps as well as check the floats.

It could be. 

I had a similar problem on my T/A and it was a bad fuel filter.  I also had  vapor lock in my line running to the carb.  Run the car for a little bit, shut it off and remove the gas cap.  Listen for air coming out of tank.

It doesn't sound like it's too hard of a problem to fix
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