Often having rough idling and switch off
I have a Toyota premio 2004.when the
engine is on for about 30 mins,it starts
having rough idling and at times has engine
check light.
It has been diagnosed but couldn't pick the
real problem.
Spark plugs checked,idle control checked,
injectors checked, exhaust checked,fuel
pump checked and replaced, airflow sensor
checked but still to no avail.what could be
the problem.engine 1NZ