High idle problem!!!!!

**ledesma54** · 10-26-2010, 07:18 PM

Okay guys today the car started acting funny after driving it around, it first started by surging really bad then at when i finally made it into the driveway it started idling as high as 2000 to 1500. Tomm morning iam going to start checking stuff. So were should i start checking??? The has been tuned for like 2 months now and it has been fine, until today.

04 GTO A4
TSP Torque V2 on a 112 LSA with PRC Dual Valve Springs
LS7 lifters
Power bond 25% under drive pulley and belts
OEM LS6 Oil Pump with new o-ring
PRC stage 2.5 5.3's ls6 cnc ported heads
Cloyes Hex-A-Just Timing Set
Comp Cams Rocker Arm Trunion Upgrade for LS rockers
Fast intake 92mm
92mm throttle bodie
oil catch can, Pacesetters LT Headers,3500 Stall, K&N CA, bmr drag bags.

**ledesma54** · 10-26-2010, 07:40 PM

Also what can i use to clean the iat sensor???? And do i need to take it apart or can i just spray it with something??

**0rion** · 10-26-2010, 07:49 PM

sounds like you have a vacuum leak or a leak after the MAF sensor. Sounds like you're getting unmetered air in there somewhere.

**ledesma54** · 10-26-2010, 08:23 PM

ya iam thinking the samething, i guess i can use some carb cleaner and start spraying around. Also i dont have a maf iam running SD.

**jjc239** · 10-28-2010, 07:14 PM

do these cars have tps?? because that happend to my old car and it was a bad tps

**Smittro** · 10-28-2010, 07:25 PM

Originally Posted by ledesma54

Also what can i use to clean the iat sensor???? And do i need to take it apart or can i just spray it with something??

It's usually not recommended to clean them with solvents. Rather the port in which it goes into can build up carbon/oil etc., usually just replace iat and iac sensors also because they are usually inexpensive..

Originally Posted by 0rion

sounds like you have a vacuum leak or a leak after the MAF sensor. Sounds like you're getting unmetered air in there somewhere.

This..

**Smittro** · 10-28-2010, 07:26 PM

Originally Posted by jjc239

do these cars have tps?? because that happend to my old car and it was a bad tps

Yes, I believe the fly by wire lsx's do not, well @ least not a visible one anyways..

**GMMAD** · 10-29-2010, 08:49 PM

check the PCV hoses

**cammed goat** · 10-30-2010, 04:28 PM

Have you checked your IAC sensor as well?

**GMMAD** · 10-30-2010, 04:33 PM

Originally Posted by ledesma54

Also what can i use to clean the iat sensor???? And do i need to take it apart or can i just spray it with something??

use electrical contact cleaner
or you can get cleaner made for maf/afm

**JAX04** · 10-31-2010, 12:41 PM

have you checked to make sure the cable hasnt got hung up?? also, yes, they have a tps, its the lower sensor on the right hand side of the throttle body, IIRC.