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05-20-2020, 06:18 PM
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#1 |
 Drives: 2018 1SS 1LE Join Date: Jul 2012
Location: Michigan
Posts: 287
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Rough cold start/idol
Finally got to drive my car a little with the PC. Anyone know why the first 60-90seconds is rough and “herky jerky”? After a min or two...it runs great and I can’t duplicate the issue. Only happens on cold starts. Plugs? I’m running PCs Canned tune....for a few more weeks at least.
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2018 SS 1LE—707rwhp, 615rwtq
2009 Pontiac G8 GT—605rwhp, SOLD |
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05-20-2020, 08:47 PM
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#2 |
 
Drives: 2016 Hyper Blue 2SS Join Date: Feb 2016
Location: Layton, UT
Posts: 500
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Could be misfiring. I had the same issue where it was rough on cold starts only and then after it calmed down it was fine. I would sometimes get a flashing check engine light indicating misfires. I used hptuners to see what cylinders were misfiring and I had to replace 2 injectors to fix it. I'm not supercharged though so it might not be the same issue.
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2SS Hyper Blue Metallic | A8 | Jet Black Interior | NPP Exhaust
Current Mods: Catch Can | aFe Lowering Springs | GM 2nd Gen Splitter | Hotchkis Sway Bars | MRR FS02 Wheels | Flowmaster Exhaust | Dark Tail Lights | Diode Dynamics Sidemarkers | Roto Fab | Solar TB | PRAY Ported IM | BMR | PRAY Tune Upcoming Mods: |
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05-20-2020, 08:53 PM
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#3 | |
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Drives: 2018 1SS 1LE Join Date: Jul 2012
Location: Michigan
Posts: 287
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Quote:
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2018 SS 1LE—707rwhp, 615rwtq
2009 Pontiac G8 GT—605rwhp, SOLD |
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05-20-2020, 10:01 PM
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#4 |
          
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 7,643
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I run 2 steps colder NGK, no issues.
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 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |
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05-20-2020, 10:17 PM
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#5 | |
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Drives: 2018 1SS 1LE Join Date: Jul 2012
Location: Michigan
Posts: 287
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Quote:
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2018 SS 1LE—707rwhp, 615rwtq
2009 Pontiac G8 GT—605rwhp, SOLD |
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05-21-2020, 07:00 AM
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#6 |
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Moderator
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: New Ipswich NH
Posts: 6,339
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What plug gap are you running? Very tight plug gaps tend to make cold starts & idling funky.
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, ATI 8L90, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors & BB HPFP, TooHighPSI/Katech port injection, 15” conversion 1066 WHP STD/1027 SAE, 9.10@152.5 (new times coming)
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05-21-2020, 08:10 AM
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#7 |
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Drives: 2018 1SS 1LE Join Date: Jul 2012
Location: Michigan
Posts: 287
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I did what the manual said....035.
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2018 SS 1LE—707rwhp, 615rwtq
2009 Pontiac G8 GT—605rwhp, SOLD |
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05-21-2020, 08:25 AM
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#8 | |
 
Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009
Location: ON THE DYNO WATERBURY CT.
Posts: 15,445
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Quote:
I retune hundreds of procharger cars and everyone is much happier after I get done. Give me a call I will get you headed in the right direction.203-753-7223 Ted.
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www.jannettyracing.com
Celebrating 39 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com |
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05-21-2020, 11:13 AM
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#9 | |
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Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 7,643
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Quote:
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2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |
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