I have a 1994 Lexus ES300 and when i first start it up in the morning the idle loops up and down and wants to turn off but remains on and no check engine light is on. Help
I think your throttle body need to be cleaned of carbon. Start there. Could also be a dirty MAF (Mass Air Flow Sensor).
I cleaned out the Throttle body and the MAF sensor at the same time not long ago. What else can it be? Maybe a TPS sensor????
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