CEL - P0507 - Page 2

Jaxcam02 · 10-18-2019, 05:41 PM

Quote:

Originally Posted by TJay74

Easy, there isnt one. GM hasnt used a IAC valve since the LS1/2/6/7/3 engines came around. The IAC valve was last used on the L98 series TPI engines and the 2nd gen LT1 engines.

Lol good. I literally just came from an LS1. Still trying to familiarize myself with new stuff. I'm old apparently.

Osbornsm · 01-16-2020, 03:18 PM

Error code is gone (because the shop disabled it)

But the symptoms of a high idle remain.

Note: The idle only climbs (to 2500) when the clutch pedal is depressed.

TJay74 · 01-17-2020, 01:53 PM

I bet the torque tables are off because of airflow issues. The 6th gen computers are all torque based, so when idle airflow and driving airflow are off it messes with the torque tables.

In the end it is a tune issue and needs to be fixed by the tuner.

Stephen12ZL1 · 01-19-2020, 06:51 AM

double check for a vacuum leak...something isn't right IMHO. Spritz a little brake/carb clean (use red extension tube) at each intake port, vacuum port at the rear, brake booster, throttle body while the engine is running. If the idle rises, you found it. Nothing is going to catch fire either...use small bursts. Brake/carb clean evaporates almost immediately. If everything checks out, get the tune revised.

Osbornsm · 02-27-2020, 11:05 AM

Source: Vacuum leak

The MSD Intake manifold has a vacuum leak.
Not sure if it's cracked or just a bad gasket, but there's the culprit.

01-16-2020, 03:18 PM	#16
Osbornsm Drives: 2018 SS 1LE Join Date: Mar 2018 Location: Illinois Posts: 616 View My Garage	Error code is gone (because the shop disabled it) But the symptoms of a high idle remain. Note: The idle only climbs (to 2500) when the clutch pedal is depressed. __________________ 2018 Camaro SS 1LE - 2011 370z - 2004 VW R32 - 2000 Civic Si Mods: Rotofab, Nick Williams 103mm TB, MSD IM, Kooks 1 7/8 Results: 470 hp / 447 tq Last edited by Osbornsm; 01-16-2020 at 03:30 PM.

01-17-2020, 01:53 PM	#17
TJay74 Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016 Location: Norman, OK Posts: 2,424	I bet the torque tables are off because of airflow issues. The 6th gen computers are all torque based, so when idle airflow and driving airflow are off it messes with the torque tables. In the end it is a tune issue and needs to be fixed by the tuner. __________________ 2019 Corvette Z06 2LZ A8 - Halltech CAI, AWE non-catted X-pipe, Mamo V2 ported TB 592rwhp, bone stock 566rwhp 2017 Camaro SS 1LE - Procharger D1SC w/ Tial 2" BOV & Race intercooler / ARH full length catless headers / Alky meth injection system - 650rwhp on conservative tune SOLD

01-19-2020, 06:51 AM	#18
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	double check for a vacuum leak...something isn't right IMHO. Spritz a little brake/carb clean (use red extension tube) at each intake port, vacuum port at the rear, brake booster, throttle body while the engine is running. If the idle rises, you found it. Nothing is going to catch fire either...use small bursts. Brake/carb clean evaporates almost immediately. If everything checks out, get the tune revised. __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

02-27-2020, 11:05 AM	#19
Osbornsm Drives: 2018 SS 1LE Join Date: Mar 2018 Location: Illinois Posts: 616 View My Garage	Source: Vacuum leak The MSD Intake manifold has a vacuum leak. Not sure if it's cracked or just a bad gasket, but there's the culprit. __________________ 2018 Camaro SS 1LE - 2011 370z - 2004 VW R32 - 2000 Civic Si Mods: Rotofab, Nick Williams 103mm TB, MSD IM, Kooks 1 7/8 Results: 470 hp / 447 tq

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