This car was running fine and then one day it wouldn't start. I let it set for a couple days and then it started right up. I drove it around for about 12 miles and then parked it. When I went to start it I ran into the same problem.
I have replaced the fuel regulator an that didn't fix anything.
Does anyone have any ideas regarding what the issue might be or a way to troubleshoot the problem?
The most common cause of flooding on start in this era Toyota is a failure of the coolant temperature sensor. When it fails the ECM thinks the engine is -40 deg F. The ECM therefore adds much extra fuel to help with this false arctic weather start. The warmer the actual temperature the harder it is to get it started.
To test for this check the voltage on the sensor of the light green wire. About .5 volts is normal for a fully warm engine. Failed will read over 4 volts.
