Quote:
Originally Posted by JDmills
Wondering about a balast resistor.. but dont really understand how they work.. I tested mine and it's resistance is slighly higher than the repair manual calls for.. on the primary side, and maybe the same on the secondary side..
so maybe i should replace that? is there also a good test to check the coil? or suggestions as to how to discover more about this ailment.
Thanks
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The ballast resistor is the usual culprit when the engine starts but immediately stalls when you release the key from the start position.
The resistor provides 6V to the coil during normal engine operation. However, when in the start position, it provides the full 12V. If the 6V side fails, the engine will start and run as long as you hold the key in "start". It stalls as soon as you let go of the key.
To confirm this as your issue, just run a wire from the battery to the coil. If the engine starts and runs, the problem is the resistor. Don't drive it that way for too long.........the system doesn't like to live on 12V indefinitely.
If it's not the ballast resistor, the choke calibration is quite sensitive on those vehicles. A very slight choke adjustment causes significant driveability changes. They have a vacuum dashpot to open the choke plate to a specified position upon start. If the dashpot has failed, the engine will run way too rich and stall. Post again if you want to get into it.