Rep Power: 0

hey guys- my car just hit 90,000 miles last week! i was so impressed about how ive never taken it to the shop for anything- even tho i did buy the car with an extended 100k mile/7yr warranty back in '01

anyway, as luck would have it- my first problem has come through.

i drive a 5spd. when i shift into neutral so that i can coast into a stop- my revs usually smoothly go down to idle- somewhere at 750 rpm. BUT NOW.. they go down to 750, then immediately kick up to 1500 and hold for about 4 or 5 seconds, then drop to 1000 (maybe 750). whats up with that? any ideas?

ive had my FIPK2 K&N air filter on for years, i just cleaned it last year. maybe its an air sensor?

Thanks

 
Rep Power: 313

IACV?

have you ever cleaned it?

 
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Check your idle air valve.

 
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Idle air control valve probably messed up. My civic was like yours it didnt have any problems untill 90k miles when my batter finaly died after 4 years lol took it long enough.

 
Rep Power: 238

does it continue to do this after the engine is up to temp? it could be a faulty cold start enrichment. basically what this does is raises the idle to about 1200-ish until the engine is up to temp, in order to get it to temp faster. i had to have mine replaced last year

 
Rep Power: 0

samethin happened to mine, but i totally dont care..two days later..it got normal.. lol

 
Rep Power: 0

i noticed that if i turn my steering wheel, the revs drop too.

i took it to the dealer- turns out that the wires from my power steering pressure sensor switch were worn out. they repaired the wires and im good to go!