SC runon - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

JB'sZL1 · 05-16-2017, 11:50 AM

Hey everyone:

Been a lurker for two months. I picked up a '13 Z auto coupe w/ 2.8 k on it 6 weeks ago. I've found two issues that I have not found posted here...hopefully someone can chime in.

1: The relay/heat sink (under the fuses on the right inner fender) will not stay clipped in. I can either zip tie it or screw it to the fender. Suggestions?
2: I have been on 50 rides thus far. All short distance except 3. Twice now the SC has run on...and stayed on. I have no acceleration at this time. The engine keeps running, and the only noise is from the SC. At all other times the SC works flawlessly, and makes no noises (other than the whine it is supposed to). I have taken the cover off and found no pulled lines or hoses. Could low coolant cause this? Or air in the system? Or is a vacuum or hose the likely suspect? I ask this because I found a pierced hose on the SC return line. I topped off w/ Dexcool and DW (about 1/2 cup). I installed silicone tape on the piercing and am installing a D3 reservoir this pm.

The first time the SC locked was on the on ramp and I was punching it (probably 3/4 throttle at 40 mph). It was locked on for about 5-6 seconds this time. The second time it locked was from a stop and I punched it (probably 1/2 throttle from 0 mph). It was locked on for 8-9 seconds this time. There are no mods other than a CAI that I installed a week ago.

Thanks, John

ABADZL1 · 05-16-2017, 12:09 PM

Exactly what do you mean by " runon " ????

JB'sZL1 · 05-16-2017, 12:20 PM

Quote:

Originally Posted by ABADZL1

Exactly what do you mean by " runon " ????

It runs (for 5-9 seconds) as though I'm flooring it (but I took my foot of the accelerator), I'm assuming with a lot of boost because there's a lot of whine...but I'm not accelerating.

Quicklsa · 05-16-2017, 12:24 PM

Might want to pull the blower belt off the sc pulley and spin it with your hand and see if there is a restriction and also a good chance to test if it has play or not this will tell you if the isolator has. Even changed to a solid one

ABADZL1 · 05-16-2017, 12:32 PM

So. You are at idle, floor it, and then let off, and the sc runs for 5-9 seconds? Is this what you mean? What does your boost gauge read at idle and at full throttle?

JB'sZL1 · 05-16-2017, 02:39 PM

Quote:

Originally Posted by ABADZL1

So. You are at idle, floor it, and then let off, and the sc runs for 5-9 seconds? Is this what you mean? What does your boost gauge read at idle and at full throttle?

At idle on start up: "vac."
At idle cruising (no throttle): "1/3 to 1/2 way between "vac and "30"."
At full throttle: "press."

I completed the SC reservoir install, so any air pockets are now gone (if that was the problem).

JBZL1 · 05-16-2017, 08:47 PM

I'm not sure what you mean by runon? Or the SC is locking on?

JB'sZL1 · 05-16-2017, 10:02 PM

Quote:

Originally Posted by JBZL1

I'm not sure what you mean by runon? Or the SC is locking on?

Yes. I stated runon because for 5-9 seconds after not throttling the SC continued to "run on" like I was flooring it.

This has happened only twice (in the 50 or so times I have punched it).

ZO6 Bryan · 05-16-2017, 11:50 PM

Quote:

Originally Posted by JB'sZL1

Yes. I stated runon because for 5-9 seconds after not throttling the SC continued to "run on" like I was flooring it.

This has happened only twice (in the 50 or so times I have punched it).

Do you mean the engine runs on? It's impossible for the SC(supercharger) to run by itself.

JB'sZL1 · 05-17-2017, 06:50 AM

Quote:

Originally Posted by ZO6 Bryan

Do you mean the engine runs on? It's impossible for the SC(supercharger) to run by itself.

The engine continues to run...but I have no throttle for 5-9 seconds. The SC whines as if it's at full boost. I think it is but this has happened only twice and I was more concerned with traffic and other things than trying to read that hidden boost gauge while I'm coasting w/ no throttle. Then all is normal.

This has only happened twice. I installed the SC reservoir yesterday and tried to reduplicate by flooring it...full boost...for 7-8 seconds...no joy...it ran and accelerated beautifully. It's clearly an anomaly. Not a good feeling to have no throttle on a busy freeway or city street.

Could this have been caused by an air lock in the SC cooling system?

RareDarkness · 05-17-2017, 12:04 PM

So your giving it throttle and when you let off it the engine continues to rev? is that what I'm gathering here?

KaBoom1701 · 05-17-2017, 12:26 PM

Never heard of this?

The S/C pulley is directly tied the crank pulley so this is basically impossible....

Can you grab some video somehow of this happening?

Was the car tuned at all? Any mods when you bought it?

BossRS4 · 05-17-2017, 02:15 PM

Is this guy trying to troll us???

Supercharger is belt driven from the crank pulley, so for it to "runon" once your off the gas is impossible.

ZMEnow · 05-17-2017, 02:17 PM

Quote:

Originally Posted by BossRS4

Is this guy trying to troll us???

Supercharger is belt driven from the crank pulley, so for it to "runon" once your off the gas is impossible.

Maybe he's hearing the Fans kick in... Otherwise lets get some simple basics brother..

05-16-2017, 11:50 AM	#1
JB'sZL1 Drives: 2013 ZL1 and 2019 Ram Laramie Join Date: May 2017 Location: Milwaukee Posts: 1,259	SC runon Hey everyone: Been a lurker for two months. I picked up a '13 Z auto coupe w/ 2.8 k on it 6 weeks ago. I've found two issues that I have not found posted here...hopefully someone can chime in. 1: The relay/heat sink (under the fuses on the right inner fender) will not stay clipped in. I can either zip tie it or screw it to the fender. Suggestions? 2: I have been on 50 rides thus far. All short distance except 3. Twice now the SC has run on...and stayed on. I have no acceleration at this time. The engine keeps running, and the only noise is from the SC. At all other times the SC works flawlessly, and makes no noises (other than the whine it is supposed to). I have taken the cover off and found no pulled lines or hoses. Could low coolant cause this? Or air in the system? Or is a vacuum or hose the likely suspect? I ask this because I found a pierced hose on the SC return line. I topped off w/ Dexcool and DW (about 1/2 cup). I installed silicone tape on the piercing and am installing a D3 reservoir this pm. The first time the SC locked was on the on ramp and I was punching it (probably 3/4 throttle at 40 mph). It was locked on for about 5-6 seconds this time. The second time it locked was from a stop and I punched it (probably 1/2 throttle from 0 mph). It was locked on for 8-9 seconds this time. There are no mods other than a CAI that I installed a week ago. Thanks, John

05-16-2017, 12:09 PM	#2
ABADZL1 ZL1 Pilot Drives: 2013 ZL1 Join Date: Apr 2014 Location: TN Posts: 1,670 View My Garage	Exactly what do you mean by " runon " ???? __________________ GP Tuning 2.5 Cam, RPS Carbon Twin Clutch, Ported Blower, Kook's Headers, Cold Air Inductions CAI, ID850's, 9.17 Lower, 2.5 Upper, JMS BAP, Pedders Front Radius Arm Inserts, Whiteline Subframe Inserts, Tuned by me with HP Tuners Idle Clip Link...........https://www.youtube.com/watch?v=gTL8S9eHwbs

05-16-2017, 12:32 PM	#5
ABADZL1 ZL1 Pilot Drives: 2013 ZL1 Join Date: Apr 2014 Location: TN Posts: 1,670 View My Garage	So. You are at idle, floor it, and then let off, and the sc runs for 5-9 seconds? Is this what you mean? What does your boost gauge read at idle and at full throttle? __________________ GP Tuning 2.5 Cam, RPS Carbon Twin Clutch, Ported Blower, Kook's Headers, Cold Air Inductions CAI, ID850's, 9.17 Lower, 2.5 Upper, JMS BAP, Pedders Front Radius Arm Inserts, Whiteline Subframe Inserts, Tuned by me with HP Tuners Idle Clip Link...........https://www.youtube.com/watch?v=gTL8S9eHwbs

05-16-2017, 08:47 PM	#7
JBZL1 Drives: 2012 ZL1 Join Date: Apr 2015 Location: Kitchener ON, Canada Posts: 176	I'm not sure what you mean by runon? Or the SC is locking on? __________________ 2012 ZL1 preproduction car #13 ROTO-FAB intake / IC reservoir , 2.85" upper , ported inlet

05-17-2017, 12:26 PM	#12
KaBoom1701 KaBoom1701 Drives: 13' ZL1 Red M6 Join Date: Dec 2012 Location: I.E. SoCal (Yucaipa) Posts: 8,630	Never heard of this? The S/C pulley is directly tied the crank pulley so this is basically impossible.... Can you grab some video somehow of this happening? Was the car tuned at all? Any mods when you bought it? __________________ Mods: Roto-Fab Intake, WW Res. kit & Big Gulp Air Scoop, Elite Catch Can, ATI Super Damper & 18% OD Pulley, LF Idler pulley bracket, Metco CC breather, ID850 Injectors, Stainless Power Headers w/ ceramic coating, TR71X Spark Plugs, JMS Fuel Pump Booster, Bo White TB, Tuned by Ted @ Jannetty Racing, Ron Davis HX, D3 Reservoir, Pfadt 1" Springs, Moreno Camber Plates, ZL1 Addons Splitter guard washers, Tow Hook kit & rock guards, Hurst Shifter Billet Plus 6 Speed Short Shifter, ZL1 DRL lighting harness, ZL1 Recaro Seats.

05-16-2017, 12:24 PM	#4
Quicklsa Drives: 15zl1 m6 with recaros Join Date: Feb 2017 Location: Texas Posts: 107 View My Garage	Might want to pull the blower belt off the sc pulley and spin it with your hand and see if there is a restriction and also a good chance to test if it has play or not this will tell you if the isolator has. Even changed to a solid one

05-17-2017, 12:04 PM	#11
RareDarkness Drives: 2013 ZL1 CAMARO Join Date: Dec 2016 Location: Flushing, Michigan Posts: 71	So your giving it throttle and when you let off it the engine continues to rev? is that what I'm gathering here?

05-17-2017, 02:15 PM	#13
BossRS4 Drives: 2013 Camaro ZL1 Join Date: Sep 2013 Location: Grand Rapids, MI Posts: 228	Is this guy trying to troll us??? Supercharger is belt driven from the crank pulley, so for it to "runon" once your off the gas is impossible. __________________ 2013 Yellow Camaro ZL1 Purchased: (9/24/16) 5% Tint All Around 45% Tint on Windshield Roto-Fab Cold Air Intake Oracle Afterburner Tail Lights Oracle LED Sidemarkers RDP Tune TSP Long Tube Headers Forza Componenti 3-Way Exhaust Controller ZL1 Addons Wicker Bill