car cuts out when putting in gear

[dmartin]

when you put car in drive or reverse it tends to want to choke down is it my timing or is it my carb needs to be adjusted(very embarassing going anywhere and stop at light and car wants to cut off) HELP!!!

 

[Roadcuda]

Is your idle set correctly?

 

[dmartin]

i've got it idled a little high but don't want it to sound like its going to run away

 

[moparchris]

Its probably a few things working all together. Most common is the distributor curve. When you put it in gear the idle drops a little and this allows the centrifugal advance to take away a few degrees of timing which makes less power and also drops the RPM more which happens over and over until it stalls.

 

[dmartin]

Its probably a few things working all together. Most common is the distributor curve. When you put it in gear the idle drops a little and this allows the centrifugal advance to take away a few degrees of timing which makes less power and also drops the RPM more which happens over and over until it stalls.

So how do you correct it

 

[69hemibeep]

So how do you correct it

Do you have a vacuum advance? Some of them are adjustable.

 

[dmartin]

Do you have a vacuum advance? Some of them are adjustable.

Yes

 

[69hemibeep]

First open the distributer put a vacuum pump on it and see if it works or at idle with a tachometer pull the vacuum hose off and plug it toward the carb ant see if the idle drops. If adjustable an allen wrench goes right down the nipple, as to what direction look at a service manual unless some one on here knows off hand.

 

[dmartin]

First open the distributer put a vacuum pump on it and see if it works or at idle with a tachometer pull the vacuum hose off and plug it toward the carb ant see if the idle drops. If adjustable an allen wrench goes right down the nipple, as to what direction look at a service manual unless some one on here knows off hand.

I have moved the vacuum lines around on the carb to distr but nothing changed but if I put my finger over the hose coming from distr it wants to die down

 

[69hemibeep]

I would refer to the service manual to see how much advance should be in the pod. Of coarse if you changed the cam its a guessing game if the factory adjustments don't help. I would guess at that point you might need more vacuum timing, but check the air fuel mixture at idle aslo.

 

[dmartin]

Yea I have a 440 4 bbl auto trany my cam is a little bigger than stock can't remember what specs it is but I rebuilt the motor and trany


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[moparchris]

Vacuum advance has nothing to do at idle. Its fed by ported vacuum (which is from high speed airflow through the carb venturi) and ported vacuum only comes into play when the carb is running off the main booster venturi. So I would say find a high performance tuner/dyno shop to recurve your distributor. Or you can by an MSD distributor and set the curve using the supplied springs and stop bushing and more importantly the instructions.

 

[69hemibeep]

I'm thinking the of the non ported vacuum in earlier cars which can be done, the ported was for emissions purposes. I would give full vacuum a try still, easy enough to reverse.

 

[dmartin]

I'm thinking the of the non ported vacuum in earlier cars which can be done, the ported was for emissions purposes. I would give full vacuum a try still, easy enough to reverse.

Thanks