Engine model 7A-FE
Situation
The engine speed did not get high smoothly and run smoothly at an idle.
Cause
Exchanged all spark plugs , then it run smoothly
.
The contents of the maintenance
There was an alarm on the diagnosis system with the throttle sensor.After delete the cord , it showed normally.
Checked No3 and 4 plug , replaced No1 and 2.
Then got high smoothly and was good idling.
I exchanged new spark plugs.
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