General Category > Quadrajet Carb Talk and Tips
Hesitation when taking off
Kavesh:
Here are the videos on youtube
https://www.youtube.com/watch?v=WSnqfFfRq9U
https://www.youtube.com/watch?v=Pl9vtBegGy4
https://www.youtube.com/watch?v=_4hrdZREmLU
Kenth:
Sounds like you´ll need to adjust the valves.
What does an intake vacuum meter show?
Kavesh:
The Holden 308 does not have adjustable valves like the Chevy motors.
I did not put the vacuum gauge in yesterday but will do.
Kavesh:
I checked a couple of things today.
As I am using an HEI, i tested the voltage to the wire going to the BAT terminal on the dizzy with ignition on, read 11.93volts. Is this a real problem as it should be 12v?
Started up the motor and she struggled to idle. At higher revs there were no issues. I let the RPM down gradually and down to idle and when it wanted to die I used my fingernail to push down the accelerator pump which gave it a shot of fuel, this kept the motor running, and then another shot of fuel when it wanted to die to help it run.
Will the above test be sufficient evidence that the problem is indeed the carb and on the idle circuit?
Kenth:
Take a measurement over the battery at idle, should read 13.5-14.5 volts.
This is what you should read at the HEI.
I have forgot how many "carb issues" i have cured for folks by feeding the HEI with correct voltage.
The HEI needs a dedicated feed wire, not the wires aimed for the points distributor which contains a resistor cable reducing volts an amps for the points to live.
You may use the points wires to control a relay from which you feed the HEI.
Been there done that a couple of decades ago, now i´m running the factory points ignition system again since i don´t care for the looks of the big ugly HEI and i don´t mind tinkering with points, checking/setting dwell once a year and replace the points every 10:th year or so.
JMHO
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