sup fellaz, i have a small problem with my teg. it might be the timing belt problem, but not sure if it's the problem. my teg revs up by itself when i put it in neutral. it used to stay around 750 rpm, but now, it stays in 1000 and revs up by itself to 1500 and comes back down and it keeps doing it. when i open the hood, one of the belt has a line of scratch like I I I <-- the two outer lines are the belt, and the one in between is the another line in the belt. the line is there through out the whole belt. so what do you guys think the problem is?? thanks a bunch in advance

 

im guessing its your tps sensor (throttle possition)...or maybe a leak in your intake manifold...one or the other...

 

Its your IACV (idle air control valve) Its a sensor thats on the back of the IM and has two coolant lines running into it. Take it off, clean it like a mothafucka, and you'll fix that.

its a pretty common problem.

 

I think it probably the TPS also. I just put a STR throttle body on my GSR and they said that if the engine revved by itself in neutral the TPS was off. Good luck

 

so it has nothing to do with timing belt or tuning??
how can i fix the tps??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Devlins 91LS &raquo;</TD></TR><TR><TD CLASS="quote">Its your IACV (idle air control valve) Its a sensor thats on the back of the IM and has two coolant lines running into it. Take it off, clean it like a mothafucka, and you'll fix that.

its a pretty common problem.</TD></TR></TABLE>

thanx man had the same problem but couldnt figure it out

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ggangtong81 &raquo;</TD></TR><TR><TD CLASS="quote">so it has nothing to do with timing belt or tuning??
how can i fix the tps??</TD></TR></TABLE>

It either needs to be replaced or adjusted. Its kinda a weird sensor, it connects to the TB and has a piece that rotates with it. Could be loose, I am not sure, I got very lucky and didn't have to adjust mine at all. You could look here maybe that would help, sorry if not, Hopefully someone will shut me down


I would definatly follow the advice from earlier posts for the IACV as well!

http://www.strspeedlab.com/Inst/TB/strtb.html

 

any cautions that i should have before playing with the tps??

 

It doesnt sound like a TPS problem. I agree with Devlins 91LS that its your idle control system. Inspect and clean the IACV and then the FITV.

 

can anybody give me a step of how to clean the IACV?? also, what can i clean it with? and any cautions?? not willing to do it by myself if there is a chance that i will harm my teg in any way...thanks.

 

i had the same problem and it was in fact the iacv.

 

Its not complicated. Just take it off and look at the inside of it. If its dirty just scrape the crud out of it. Nothing an old toothbrush cant solve.

 

damm second thread that mix advise was given

the tps can not be adjusted is not that simple thats why its rivetted
its just a simple clean of the valve take the two bolts from the back of
cylinder and a spring will pop out be careful not to lose it..
then clean it and place some good old grease and thats it..

 

mine was doing the same thing revving up in neutral and all....i cleaned out the IACV and it solved the problem. so thats what id do...its real easy there isn't anything you can mess up.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mr.beeks &raquo;</TD></TR><TR><TD CLASS="quote">damm second thread that mix advise was given

the tps can not be adjusted is not that simple thats why its rivetted
</TD></TR></TABLE>
I agree that it sounds like the IACV.
But you are wrong the TPS can and SHOULD be adjusted with a volt meter, when FIRST attached, check your Helms. It doesn't need to be adjusted again AFTER the initial adjustment however, unless shear bolts were not used. Those are NOT rivets they are shear bolts.

 

my guess is aLWAYS the tps...

 

any link with the pix of how to clean the IAVC?? thanks guys. also, the rpm stays around 1000, not 750. will cleaning IAVC solve this problem as well?? it idles at 1000 now....

 

Do you think this will solve a problem with just a high idling rpm by itself? My ls idles around the 2k margin...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MyNameIsMike &raquo;</TD></TR><TR><TD CLASS="quote">Do you think this will solve a problem with just a high idling rpm by itself? My ls idles around the 2k margin...</TD></TR></TABLE>

i think for your problem, there is a **** or something that you can adjust to lower your idle. ask around. any suggestions to my problem?

 

I had this problem with my si and it was the IAVC just a small round censor looks like a small pong case. I had to buy a new one at around 200 bucks but you should try cleaning yours first. once I got the new one in place it never did it again so give that a try and I know it will work for you.

 

Just be careful when tampering with the TPS. You could destroy it and be pissed off at yourself because you just destoryed an important piece to make the engine run right.. tps'es are hard to get it seperate these days and usually the dealer will charge you the whole throttle body just to get the damn tps. But anyways, theres no reason the touch the tps in the first place. It's already mounted correctly and doesn't need to be touched, but if the connection is loose to it, that could be the problem. Just clean your iacv and you should be fine. Disconnect the battery for a good minute if you are throwing a CEL and everything should be

 

thanks for all of your replies people. i am kinda new to doing it for myself...so i am afraid to do it and mess it up..so i need an instruction, possibly with pix, of how to clean it step by step...anybody??

 

nobody?? com'on..i know there are tons of gurus...help a brother out

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ggangtong81 &raquo;</TD></TR><TR><TD CLASS="quote">nobody?? com'on..i know there are tons of gurus...help a brother out</TD></TR></TABLE>
Try posting the question in the tech forum.

 

A BOUNCING or SURGING Idle is the IACV.

A FAST idle has a few culprits. Could be your idle adjustment screw, could be a TPS problem, could be a Vacuum leak...

But for the IACV cleaning instructions, go to http://www.g2ic.com and look under teg tips. Yes i know that they're for the DA/DB but they work exactly the same on a DC, EG, EF, etc

And i'm sure that a bouncing idle wouldn't be caused by your tps. If your tps was twacked it would result in a fast or high idle.

If you check EVERYTHING, clean your iacv and your idle still bounces, check your coolant levels. Having excessive air in coolant lines have been known to do that occasionally.