Re: hot engine hard starting

Posted by fredkanter On 2016/7/11 12:50:21

In my experience and opinion vapor lock is blamed for many problems where it is not the culprit. As with the subject vehicle other things need to be explored.

As I understand it:

Cold start and run are fine
Problem occurs after the car is warm and it is shut down, then it does not start until is sits fro 1/2 hour.

Here is what I have found:

1. Cold start the choke is closed letting the engine suck in gas to start

2. After a hot run it is shut down and the choke is wide open, thus cannot suck in gas.

3. Problem is often an inoperative accelerator pump circuit which squirts gas in the carb throats.

4. Cooling down for 1/2 hour closes the choke somewhat or 100% and presto the car starts "proving" it was vapor lock.

5. When cold open the choke plate and look into the carb, pump the gas and see if the squirter is working in both barrels. If not, you've probably found the problem.

6. When hot, repeat above.