JMvtec

ok guys here my lil problem ... i have a 00si and for some reason when sitting at a stop light the rpms would go up really high to like 2000rpms and bounce just a little bit but once i started driving every little touch off or on the gas would be really jerky but when i turned my car off and back on it would be gone for a lil bit and i posted up something on here and alot of people told me it was my IACV so finally about a week ago i bought a used iacv from a friend and put it in a couple days ago and everything was good ... untill today !!! it started doing it again ... and someone told me it could be my map sensor ?!? and i was wanting to see if thats possible or what else it could be ... thanx guys!!

EJgsr

are your hoses kinked or hooked up wrong???

JMvtec

not that i know of !!! but y would it work and then when i turn off my car and then back on it stops for maybe 2 or 3 days ... makes me think is electrical ??

JMvtec

anyone ??? could it be my map sensor ??

EE_Chris

Now that you've replaced the IACV, did you rebleed the coolant?

Is it a bone stock '00 Si? How many miles? Done any work/maintenance to it recently (besides the IACV)?

JMvtec

its pretty much stock ... just short ram and it has 56,000 miles ... no major maitence other than master cylinder ... but i'm pretty sure its something electrical ... but i did buy the iacv from a friend so i'm thinking about going and buying another ... because i was throwing an iacv code

EE_Chris

Did you rebleed the coolant? When you replace the IACV, you have to undo coolant hoses going to it which introduce air into the coolant system.

w0ng_sta

agreed.. bubbles could lead to idle mishaps.. vac leak maybe?.. wouldnt explain the inconsistancy of the problem but it does sound like one

JMvtec

ok i'll check for leaks again ... and hope that i find one cuz i'm sick of this problem lol... but i dont want to pay 1000 to have a dealer do it and get it done ... i hope i can find it out myself and hopefully its a diy project

JMvtec

checked and found no leaks ... just want this problem to be gone !!

EKBOOSTDREAMS

Did you bleed the coolant system?

EE_Chris

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EKBOOSTDREAMS &raquo;</TD></TR><TR><TD CLASS="quote">Did you bleed the coolant system?</TD></TR></TABLE>

x2

You're NOT looking for leaks in the coolant system. The fact that you have replaced the IACV means you introduced air into the coolant system....which you have to bleed out.

JMvtec

ok thanks ... i'll try and bleed it and see if maybe thats the final touch

B18C5-EH2

An IACV will usually throw a check engine code when it's bad:

IS YOUR CHECK ENGINE LIGHT ON?

Also I've seen an idle mixture screw backed out some, which caused an idle control malfunction code, which people automatically assume is the IACV every time, which isn't the case.

JMvtec

yea its throwing a code !!! can there be anything else that will make the iacv cel go off

NocsCtr

maybe a bad ground but than u would have other codes as well i had a bouncy idle awhile ago i found it was my throtle plate stop screw an it was causing problems with my acel too it was causing my throtle to be a bit sticky it may be electrical especially since your car is throwing a code but have u tried to clear the code an see if it comes back?

Unit44justin

maybe your throttle position sensor bring it to the dealership and just have them diagnose the problem just to find out what s wrong

B18C5-EH2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JMvtec &raquo;</TD></TR><TR><TD CLASS="quote">yea its throwing a code !!! can there be anything else that will make the iacv cel go off</TD></TR></TABLE>

Exactly what code is it throwing?

Ausnap

If he just replaced his IACV then it's obvious to everyone it's air in the coolant...

One has to assume if he ignored the first two responses and wasn't completely aware he even had to bleed it in the first place, until he bleeds the system he's going to continue having the problem (or others) regardless of the code he's throwing...

JMvtec

i cant member the code number exactly but its like 43 or something like that its the code that says idle air control valve defect ... and yes i need to bleed my coolant system and i plan on doing it this weekend !! and yes i have tried clearing the codes and the light poped back in later that day ..

SoHc94

yea i say bleed tha coolant... I just changed a head gasket. and put it back on. and the idle was of course bouncey. The more air i got out. they smoother the idle got.(thats saying sumthng). ANYTIME u disconnect a coolant hose. MAKE SURE U BLEED THA SYSTEM.