Idle control valve

**mo$z28** · 05-28-2008, 08:49 PM

SES read idle control vlave idle to high so i bought a new one I just replaced the valve however after a full cycle my ses light comes back on and says idle to high now it is a exact factory replacement idle control valve (before you ask) now does any one know if i have to calibrate the valve or could it be because my exhaust is dumped??? i also have a cut egr valve. pliz help http://www.ls1.com/forums/images/smilies/wtf.gif

**0rion** · 05-28-2008, 09:34 PM

any mods done to the car and is there a chance you have some un-metered air getting in somewhere? Check the hoses on the side of the intake and make sure you didn't knock one off. Also, check those hoses for cracks.

**Cutlass** · 05-29-2008, 03:10 AM

whats the code number? Sounds like it could be a vacuum leak

**mo$z28** · 05-29-2008, 08:45 AM

i'll have to take it to schucks to use their computer again but my mods are on my first thread i'll check out the hoses then i'll get back to you

**0rion** · 05-29-2008, 08:49 AM

not sure if schucks is a parts store or shop but most larger parts stores will pull codes for free. Check around the TB and intake area for leaks. Anywhere after the MAF sensor really.

**0rion** · 05-29-2008, 08:50 AM

Originally Posted by mo$z28

i also have a cut egr valve.

I just noticed this..... can you explain what you mean here?

**mo$z28** · 05-29-2008, 10:14 AM

where the egr valve enters the manifold is cut so that it doesn't stick down as far as it did letting more air flow

http://www.bowlingss.com/LS1_How_To.htm

scroll down to EGR free mod

**mo$z28** · 05-29-2008, 10:16 AM

oh and i just checked all my hoses all connected good what now???

**mo$z28** · 05-29-2008, 10:16 AM

http://www.bowlingss.com/LS1_How_To.htm

EGR free mod

**0rion** · 05-29-2008, 10:58 AM

did you do the egr mod at the same time? There's an o-ring that seals that egr to the intake. I've seen where people have either pinched that o-ring or lost it altogether. If it was done before all this started happening then I would doubt that's your problem but if you did the egr mod at the same time or when this started happening I'd look at that o-ring.
That code you're getting typically is for un-metered air getting in somewhere so I would check everything after the MAF for leaks.

**0rion** · 05-29-2008, 11:01 AM

just on a long shot try this.....unplug your iac and turn the key to run but don't start the car. Then turn the car off and plug it back in and turn the key to run again. Maybe for some reason it's seeing a different throttle % or something. That's a total guess but is easy to try. That'll for sure set your throttle % to zero.

**Cutlass** · 05-29-2008, 03:44 PM

Originally Posted by 0rion

not sure if schucks is a parts store or shop but most larger parts stores will pull codes for free...

Checker, Schuck's, Kragen auto parts are big crappy parts store chain.
http://www.cskauto.com/

**mo$z28** · 06-05-2008, 04:28 PM

ok so i went to check my computer error codes are
P0171 SYSTEM TOO LEAN BANK 1
P0174 SYSTEM TOO LEAN BANK 1
P0507 IDLE AIR CONTROL SYSTEM HIGHER THAN EXPECTED
SO WHAT DO I DO NOW??? THANKS FOR THE REPLY'S BY THE WAY
oh and just so you know the ses light was on before i cut the egr and did anything else.
HELP!!!!

**Cutlass** · 06-05-2008, 05:01 PM

All right now we are getting somewhere!!! 2 lean codes and a high idle definitely point to a vacuum leak. Check the PCV valve. Maybe its gummed up and stuck open. Otherwise check the vacuum hoses for cracks or disconnections. if you still can't find the leak, try spraying carb cleaner or throttle body cleaner on suspect areas while the engine is running. If the spray hits a leak and get sucked into the engine, the engine will sound different and the rpms will change.

**0rion** · 06-05-2008, 10:47 PM

Originally Posted by Cutlass

All right now we are getting somewhere!!! 2 lean codes and a high idle definitely point to a vacuum leak. Check the PCV valve. Maybe its gummed up and stuck open. Otherwise check the vacuum hoses for cracks or disconnections. if you still can't find the leak, try spraying carb cleaner or throttle body cleaner on suspect areas while the engine is running. If the spray hits a leak and get sucked into the engine, the engine will sound different and the rpms will change.

agreed......I normally use propane instead though from a torch ( unlit of course

). Works the same, just doesn't require spraying stuff on the engine.

**Cutlass** · 06-06-2008, 03:14 AM

Yep that works too!

**mo$z28** · 06-07-2008, 09:40 AM

cool thanks guys but one more question where is the PCV VALVE ?? I looked for it in my haynes book but i cant find it ??

**0rion** · 06-07-2008, 09:46 AM

It lays at the top of the passenger side valve cover. There's some foam padding wrapped around it. Just take that foam off and the valve is underneath it.

**mo$z28** · 06-12-2008, 06:44 PM

YOU GUYS ARE AWESOME THANKS FOR THE HELP IF YOU GUYS ARE ANY WARE NEAR MCCHORD AFB SEND ME AN EMAIL I'LL BUY YOU A SIXER THANKS AGAIN I FOUND THE LEAK AND REPLACED THE HOSE WITH A NEW ONE.

**0rion** · 06-12-2008, 08:17 PM

Originally Posted by mo$z28

YOU GUYS ARE AWESOME THANKS FOR THE HELP IF YOU GUYS ARE ANY WARE NEAR MCCHORD AFB SEND ME AN EMAIL I'LL BUY YOU A SIXER THANKS AGAIN I FOUND THE LEAK AND REPLACED THE HOSE WITH A NEW ONE.

pcv hose was cracked then? Glad you got it fixed.