after my car is fully warmed up... whenever i get to a stop and put it in neutral like waiting for light to turn greeen or a sto psign... my car idles down to like 100 and the motor shakes bad and tries to die then eventually it will die... if i dont keep reving... any ideas

just got a valve adjustment thought that might be it but didnt fix the dying problem...

check the throttle posistion sensor. and adjust the throttle cable also.

tommorow ima have a shop check my tps and stuff...

they think its a vacume line or something...could that be

IAC valve, check that, CODE 14

now the engine does the total oposite of that. now whenever i go to a stop the engine drops to 1,000 then goes up to 1800 never goes below that... what is the problem now...

IAC valve, Idle Air Control

replaced the IAC VALVE.... still does it.

hmmm.... just wondering, but where is your coolant temp. gauge usually run at? and does it move when you stop the car?

little below middle and and it goe's to cold when turn off car

thats normal

My son's car 97 Civic revs up and down at neutral and sometimes when driving. I put in a fuel intake cleaner into the gasoline tank filled it up and so far the problem has not returned. I posted the problem under 92 + Civic in this AF forum and one replied that it did that when his oxygen sensor shorted.

i replaced the iac valve... my car still does t his crap... when i turn it on in the morning it revs like 2300 rpms.. then when it warms up it still stays at 1800 to 2000 it wont go lower... i rev it and it drops to 1,000 then split second later it bounces back up and idles at 1800 to 2000... i have no idea whats wrong but its ANNOYING and can't be good for the engine

have you tried the engine temp sensor? lots of probs with these.when they go wrong the computor senses cold all the time,hence high revs.

no where is this engine temp sensor.. and i'll replace it...

Check out the Discussion forum for 92+ Civic. Look under The Honda Performance, Section 3 Intakes, IACV Problem. It is a similar problem to yours and the guy solved his problem.

that post just said to replace the throttle body gasket...? i have a custom made gasket on there rite now... maybe thats the case?

Did you ever resolve this issue? I'm interested to hear the results as I seem to be having a similar problem.

~Chris

check the vaccum line from the pcv valve to the manifold. the same thing happened to my si. the line split. i've seen it on several others also.