Rep Power: 0

Hi there.

I am a newb so I apologize in advance if I do this wrong.

Have a 2002 Civic Si with about 96k on it. Car is manual and lately when I've been starting it the engine will idle to about 1,500-2,000 revolutions. It settles down after a few minutes.

Have done basic maintenance over the years, but have not done a tune-up, timing belt, etc.

Any ideas on what this could be?

 
Rep Power: 313

Probably the TPS sensor, are you getting a check engine light? Is it a Canadian Si? If so you are due up for a timing belt, though the timing belt would not cause your issue.

https://www.civicforums.com/forums/3...e-posting.html