my 99 si's idle?
 

hey guys my 99 civic si has a wierd idle problem right now, lately the idle just jumps between 1grand and a half when i leave it running and just sit there for a lil bit, the car starts to shake when the idle gets low and it doesnt go back up to normal unless i give it some gas. my idle adjustment is fine so idk what could be causing this? need new spark plugs or something dumb? heh

Re: my 99 si's idle? (gobblebox59)
 

could be alot of things, not getting enough spark, the IAVC needs to be cleaned is it throwing any CEL's?

Re: my 99 si's idle? (gobblebox59)
 

What are your mods if any?

Re: my 99 si's idle? (SiRGodfather)
 

dc 4-1 sport headers, aem cold air intake, apexi world sport exhaust, alot of minor things like msd spark plug wires and what not, my car just seems to be running really rough and the idle doesnt stay at right below a grand where it used to, it just dips down to like 400-500 alot and seems like my cars gonna die but it hasn't yet. idk thanks for advise guys.

Re: my 99 si's idle? (gobblebox59)
 

btw 113,000 miles have anything to do with it? everything else seems to run fine though!

whats with all these weird idle questions. its normal to have idles below 1k. the way i figure is that its summer and its hot.. that must have to play a big role

Re: (jerbear!)
 

good reasoning!

Re: (jerbear!)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jerbear! &raquo;</TD></TR><TR><TD CLASS="quote">whats with all these weird idle questions. its normal to have idles below 1k. the way i figure is that its summer and its hot.. that must have to play a big role</TD></TR></TABLE>

yeah i have been noticing alot also.

Re: (VTECschmetec)
 

mine idled funny and my intake came loose and i just needed to tighten it down to the throttle body better ... i dunno ... thats what i did

Re: my 99 si's idle? (gobblebox59)
 

It's pretty normal. my si does it, and i have about the same setup. I wouldn't worry about it unless you have an engine code goin off. https://honda-tech.com/forums/images...es/emsmile.gif

Re: my 99 si's idle? (B9000rpm)
 

my old car, a 98 ex with ls motor.. did that a few times. then i noticed the vaccum hose was disconnected.. i mean, it's kind of noticeable if you know wtf it is, but obviously i didnt until i saw a little hose just dangling.

Possible ignitor failing

Re: (Jimmy)
 

my car has been doing it too but mine will idel at 1 then when im driving it will stay at 2 and sometimes if i give it gas it will go back down to one then right up to 1500 and sometimes it stays at 3..... does anyone know what i shoudl do

Re: (93civicdead)
 

ever replaced your ground wires? Particularly the one from the valvecover to the chassis? I've got about 115k on my 98ex and was having low idle issues. Car would almost cut-off, but not quite. Give it gas and it was fine. Replaced my ground wires and problem is gone. Real easy to make your own with some 8 guage wire and gold plated terminals.