I have a 2000 Si..stock ecu, stock everything on motor except aem cold air..

The car was due for an oil change and ran fine up to the oil change.. Now CEL comes on, and sitting at stop, idle surges up and down.. from about 200 to about 1400rpm..

Im thinking possible IACV.. but why would it run fine until oil change then all of a sudden do this?.. Anyone ever have this problem? I will go out and check to find out what it is coding for..

 

the iacv is working.. thats why it going up and down.. its penning and shutting.. make sure no vacuum lines got disconnected.. did you touch the idle screw? opening it too much can case surging

 

no, i didnt touch the idle screw at all.. Im thinking maybe a vaccum line got disconnected..

I need to find out what it is coding for and go from there i guess...thanks man

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gotnos2 &raquo;</TD></TR><TR><TD CLASS="quote">no, i didnt touch the idle screw at all.. Im thinking maybe a vaccum line got disconnected..

I need to find out what it is coding for and go from there i guess...thanks man</TD></TR></TABLE>

take it over to a part store and have them run a diagnostic (it's free). they will be able to tell you the code, then if you have any problems come back here with the code.

IMO, it does sound like a vacuum leak. double check you hoses, also can be a MAP sensor issue. when mine went out, it was like night and day.

 

Is the car OBD-1 or 2? Also, make sure that your oil dipstick is all the way down. If you search around in the FAQ you can find what code you have, and how to check it.

 

its a 2000.. so OBD2.. and it coded for 14 which is IACV...
any ideas?.

 

did you check for a vacuum leak?

 

FIXED&gt;.. thanks to everyone who helped.. im retarded.. vacuum line came off from back side of IM near IACV...

Thanks again, I appreciate it..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gotnos2 &raquo;</TD></TR><TR><TD CLASS="quote">FIXED&gt;.. thanks to everyone who helped.. im retarded.. vacuum line came off from back side of IM near IACV...

Thanks again, I appreciate it..</TD></TR></TABLE>

don't you hate when that happens. atleast it was fast and cheap!

 

yeah exactly.. Im glad it was onlt that problem though..