[Jon]

My Z backfires, and runs at a slow and rough idle, after nice warm up, sites for 10-30 minutes, after 30 minutes, no problem, vapor lockup maybe, any advice would help.

 

[Unknown User]

> My Z backfires, and runs at a slow and rough
> idle, after nice warm up, sites for 10-30
> minutes, after 30 minutes, no problem, vapor
> lockup maybe, any advice would help.
Try cleaning the contact on the water temperature
sensor.It's located infront of the thermostat housing.
It's worth a try
Dave S