383 4 speed hesitate

[bobfist]

Hi!

On my 383 with 4 speed i have a hesitate just one sec when throttle and changing gear
i have a stock 4160 holley carb 600 in the engine
Spark plugs a checked, cables and ignition timing

Read somewhere that a glogged fuel filter can cause this?
Can it make this thing just when acceleration if filter is bad?

[A383Wing]

doubt it...bet accel pump on carb is out of adjustment or discharge nozzles are a bit small

[bobfist]

ok got the shop manual so i can adjust the acc pump.
Strange if the nozzels would be to small when its original but who knows

[70moparman]

I have a 383 / 4speed with same problem... Only Im running a Carter AVS.  I took it apart and cleaned it up, adjusted the floats, set timing, advanced timing a little (seemed to run better) and when I give it full throttle it studders... if  back off to 3/4 throttle its smooth as silk and pulls hard...  I was going to buy a rebuid kit next and soak my jets... How do you adjust the acc pump, just the 3 hole settings in the lever?

[bobfist]

i can copy the pages from my book how to adjust
My just stumble for a split of a sec when changing gear , its possible to live with but annoying

[Budnicks]

I have a 383 / 4speed with same problem... Only Im running a Carter AVS.  I took it apart and cleaned it up, adjusted the floats, set timing, advanced timing a little (seemed to run better) and when I give it full throttle it studders... if  back off to 3/4 throttle its smooth as silk and pulls hard...  I was going to buy a rebuid kit next and soak my jets... How do you adjust the acc pump, just the 3 hole settings in the lever?

sounds like it's probably too lean, I'm not a fan of the Carter or the Edelbrock carbs, that will be for someone else to answer... there are books & DVD's on tuning the Weber/Carter/Edelbrock carbs it would be a great idea to get one

[XH29N0G]

This is something that it did not do before? right.  I take it that you have checked to make sure the accelerator pump is working properly and set properly.  I also take it that you have checked the ignition.

[bobfist]

yes ignition checked, but i still thinking of that msd blaster 2 coil, mabaey they aint so good?
Im not the one who putted it there

[Budnicks]

Hi!

On my 383 with 4 speed i have a hesitate just one sec when throttle and changing gear
i have a stock 4160 holley carb 600 in the engine
Spark plugs a checked, cables and ignition timing

Read somewhere that a glogged fuel filter can cause this?
Can it make this thing just when acceleration if filter is bad?

Is it a stock engine ?? Probably something either out of adjustment or clogged partially in the accelerator pump & discharge nozzle circuits or possible a low float level starving the carb at W-O-T {that is if it is carburetor related}... do you live at high altitude ??, or moved from low to high altitude or visa versa ??, anyway jetting could be wrong too... how old is the fuel filter ?? is there a bunch of stuff in the carb bowls from the fuel tank ?? what do the plugs look like ??, how old is the wires, cap & rotor ??, what is the initial timing set at ?? a little more advance may help too.... pretty much sounds like a maintenance or tuning issue... have you checked for a vacuum leak ?? have you checked the air-gap {make sure to use a bronze or non-magnetic feeler gauge} make sure it's .008" {if it's a Electronic ignition} ?? or possibly the dwell, points & condenser {if it's a points type distributor}...

[Cooter]

doubt it...bet accel pump on carb is out of adjustment or discharge nozzles are a bit small

[bobfist]

So, have been checking everything but still have a small hesitage when throttle
i read somewhere that the mopar performance timing sets with the distributor didnt work good a low rpm
is this true? can this be the problem.

I have set the base timing with the vacuum disconnected to 15 deg is this to little?

[Budnicks]

So, have been checking everything but still have a small hesitage when throttle
i read somewhere that the mopar performance timing sets with the distributor didnt work good a low rpm
is this true? can this be the problem.

I have set the base timing with the vacuum disconnected to 15 deg is this to little?

To answer your questions NO I have no problem with the MP CEI Distr. & NO 15* initial timing, really isn't too much, especially if that's what the engine likes & it doesn't ping...

[bobfist]

Ok thanks. Is ot common that the timing tab down at the balancer shows to little degrees.
My just go from -15 to + 15

[XH29N0G]

The original harmonic balancer (I think that is what it is) on mine had one mark and the tab had sparing marks at 0 +5 or 10, and maybe a minus mark.  I am sorry I cannot be more precise as the engine has been rbuilt.  What I did was to use a sharpie on the harmonic balancer to mark off a few more  divisions.  I think I did it correctly.  I measured the circumference of the harmonic balancer, divided by 360 to get an idea of how far the 5, 10, 15 degree marks would be and then marked them on it.  This can be compared with the +/- 15 or +/-5 to check.  Then I was able to check all that I needed to check with timing advance at different engine speeds, etc....

 

[MSRacing89]

What power valve are you running?  What kind of vacuum is the motor making?