Nissan Repair: Engine Idle problem, throttle position sensor, nissan bluebird
QuestionThank you so much for your prompt answer to my questions.
Yes, I need your help on the steps of the exact process for removal and cleaning of throttle body.
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Followup To
Question -
I am an owner of NISSAN BLUEBIRD EU-13 with engine SR20 and mechanic transmission. The engine has abnormal idle when I push the acceleration pedal and get it back then the idle speed going down almost "0rpm" and back to normal/~750rpm/ and go down again "~0rpm" and so on for a few time. Then it back to normal speed. Also when I driving the car after I changing the gear sometimes engine off.
What is the problem? How can I repair it?
Answer -
Xu,
If you idle goes up and down you have either a sensor that is defective and the car is hunting for an idle or you have a bad idle air control valve that is plugged up. This is on the intake and it is what meters air to the engine when at idle. I would first check all the vacuum lines to see if any are cracked or disconnected. If not, do a tuneup with new plugs and clean the throttle body. I still think it is going to be the idle air valve. If you get a Haynes manual or a factory one it will show you the exact process for removal and cleaning. Email me back and I will work you through the steps if you need help.
AnswerXu,
First, I would not remove the throttle body unless it is really dirty like chunks of carbon in the intake tract. But, to remove there are only four bolts, the throtle linkage, vacuum lines and the intake hose and throttle position sensor connector. Mark all vacuum lines before you take the throttle body off. Also, get a new throttle body gasket prior to removal as some are hard to come by. Do not get solvent on the throttle position switch or any electronic component as it will destroy them. Spray the throttle body down and make sure you clean out all passages with the spray. Once dry reinstall and reconnect all items mentioned above. Make sure the linkage works properly and you have the throttle position switch in the same location as it was before.
