Bad idle after track day - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

StingrayblueSS · 04-15-2019, 07:43 AM

So Saturday I went to the dragstrip to get some test passes. I got there late so I had to run two back to back before the elimination round. Car ran great both times
They were doing bracket racing which I wasn't interested in I just wanted a go time slip so I decided I was not going to try to stay under my index. During the third pass I felt a vibration thru the steering wheel so I let off the gas and went back to the pits. Everything seemed ok so I thought it was maybe a tire balance issue. Drove home everything normal no codes. Yesterday I started it and there was a definite miss but no codes. Tonight I'll pull the plugs and try to see what's going on. It's a 2013 ss auto with 34000 miles headers intake 3.91 gears. Should I expect the worst?

lazerlemonta · 04-15-2019, 08:04 AM

Change the plugs maybe. Did you change them when you installed headers? If you dropped one or bumped one with a header they crack rather easy and can cause a good miss over time.

StingrayblueSS · 04-15-2019, 08:16 AM

Quote:

Originally Posted by lazerlemonta

Change the plugs maybe. Did you change them when you installed headers? If you dropped one or bumped one with a header they crack rather easy and can cause a good miss over time.

That's what I'm hoping for something simple. Engine sounds the same with no loud tick or anything.

StingrayblueSS · 04-15-2019, 12:19 PM

Quote:

Originally Posted by lazerlemonta

Change the plugs maybe. Did you change them when you installed headers? If you dropped one or bumped one with a header they crack rather easy and can cause a good miss over time.

I didn't change the plugs or remove them. the headers have been on for two years.

HyperV117 · 04-15-2019, 12:36 PM

Bad idle can be a bunch of things. I was dealing with this recently. I cleaned the MAF, the throttle body and did the fuse pull and that made a huge difference and not only at idle. A few days later I had a really bad misfire but then I found that one of the ignition cables had come off the coil.

Finally there's fuel. If for some reason you got some bad fuel in the tank it's possible the car isn't going to go back to normal until you replace that batch. Doing the fuse pull after that should clear it up.

StingrayblueSS · 04-15-2019, 03:56 PM

Here's the left bank plugs

StingrayblueSS · 04-15-2019, 04:46 PM

Here's the passengers side. Also found loose wire that may have caused the misfire.

StingrayblueSS · 04-15-2019, 05:40 PM

Input would be appreciated on condition of plugs to me it looks like the electrodes are almost gone.

StingrayblueSS · 04-15-2019, 05:54 PM

Input on condition of plugs would be appreciated. Looks like the electrodes are almost gone.

JD555 · 04-15-2019, 06:06 PM

hard to tell but some look like they are pretty worn.

StingrayblueSS · 04-15-2019, 06:52 PM

Only 34000 miles

zz430camaro · 04-15-2019, 06:52 PM

Plugs look OK, that one plug wire looks a little crusty.

StingrayblueSS · 04-15-2019, 07:04 PM

Quote:

Originally Posted by zz430camaro

Plugs look OK, that one plug wire looks a little crusty.

That's the wire that was loose from the coil.

zz430camaro · 04-15-2019, 07:53 PM

Did you swap it out and see if its OK?

04-15-2019, 07:43 AM	#1
StingrayblueSS Drives: 2013 Camaro SS Join Date: Feb 2017 Location: Indiana Posts: 901	Bad idle after track day So Saturday I went to the dragstrip to get some test passes. I got there late so I had to run two back to back before the elimination round. Car ran great both times They were doing bracket racing which I wasn't interested in I just wanted a go time slip so I decided I was not going to try to stay under my index. During the third pass I felt a vibration thru the steering wheel so I let off the gas and went back to the pits. Everything seemed ok so I thought it was maybe a tire balance issue. Drove home everything normal no codes. Yesterday I started it and there was a definite miss but no codes. Tonight I'll pull the plugs and try to see what's going on. It's a 2013 ss auto with 34000 miles headers intake 3.91 gears. Should I expect the worst?

04-15-2019, 08:04 AM	#2
lazerlemonta Drives: 2010 C6 1LT Join Date: Dec 2011 Location: Virginia Posts: 879 View My Garage	Change the plugs maybe. Did you change them when you installed headers? If you dropped one or bumped one with a header they crack rather easy and can cause a good miss over time. __________________ 2010 C6 JET STREAM BLUE BOLT ONS TO THE EXTREME, GPI 281cc HEADS, Darth_V8r SPEC CAM, FAST 102 INTAKE, CRANK SCRAPER, QUARTER MASTER 7.25" CLUTCH, RPM 3.90 STAGE II DIF, Z51 Gear Set AND E85 Best ET 10.58 @ 131.8 stock heads and stock cam 453/445 SAE 10.62@134.82 GPI 281CC Heads, SS4 Cam and X1 Intake Best 1/8 6.80@105.75 Best MPH 134.82

04-15-2019, 12:36 PM	#5
HyperV117 Drives: 2010 Camaro 1SS Join Date: Nov 2015 Location: CA Posts: 358	Bad idle can be a bunch of things. I was dealing with this recently. I cleaned the MAF, the throttle body and did the fuse pull and that made a huge difference and not only at idle. A few days later I had a really bad misfire but then I found that one of the ignition cables had come off the coil. Finally there's fuel. If for some reason you got some bad fuel in the tank it's possible the car isn't going to go back to normal until you replace that batch. Doing the fuse pull after that should clear it up. __________________

04-15-2019, 03:56 PM	#6
StingrayblueSS Drives: 2013 Camaro SS Join Date: Feb 2017 Location: Indiana Posts: 901	Here's the left bank plugs Attached Images

04-15-2019, 04:46 PM	#7
StingrayblueSS Drives: 2013 Camaro SS Join Date: Feb 2017 Location: Indiana Posts: 901	Here's the passengers side. Also found loose wire that may have caused the misfire. Attached Images

04-15-2019, 05:40 PM	#8
StingrayblueSS Drives: 2013 Camaro SS Join Date: Feb 2017 Location: Indiana Posts: 901	Input would be appreciated on condition of plugs to me it looks like the electrodes are almost gone.

04-15-2019, 05:54 PM	#9
StingrayblueSS Drives: 2013 Camaro SS Join Date: Feb 2017 Location: Indiana Posts: 901	Input on condition of plugs would be appreciated. Looks like the electrodes are almost gone.

04-15-2019, 06:06 PM	#10
JD555 Drives: 2014 2SS RS, 6 sp man Join Date: Feb 2016 Location: Marlton, NJ Posts: 461	hard to tell but some look like they are pretty worn.

04-15-2019, 06:52 PM	#11
StingrayblueSS Drives: 2013 Camaro SS Join Date: Feb 2017 Location: Indiana Posts: 901	Only 34000 miles

04-15-2019, 06:52 PM	#12
zz430camaro Drives: 2015 1LE Join Date: Oct 2015 Location: Cleveland, OH Posts: 1,485	Plugs look OK, that one plug wire looks a little crusty. __________________ 2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ

04-15-2019, 07:53 PM	#14
zz430camaro Drives: 2015 1LE Join Date: Oct 2015 Location: Cleveland, OH Posts: 1,485	Did you swap it out and see if its OK? __________________ 2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ