You are browsing camaro6 
06-19-2018, 08:09 PM
|
#1 |
  
Drives: 2017 Camaro SS Fifty Join Date: Oct 2016
Location: Port St Lucie, Florida
Posts: 966
|
SS backfire and miss at high RPM
I have a SS A8 and it backfires and misses at full throttle between 4500 and 6000 RPM's. Anybody know what it could be. Been doing it on 3 different tanks of fuel.
|
|
|
|
06-19-2018, 08:37 PM
|
#2 |
   
Drives: 2016 2SS Convertible Join Date: May 2012
Location: St. Louis, MO
Posts: 1,710
|
That's not much to go on. It sounds like a trip to the dealer to let them run diagnostics on the engine.
|
|
|
|
06-19-2018, 08:44 PM
|
#3 | |
|
Quote:
__________________
2016 2SS/Hyper Blue/M6/NPP/Navi
Forged pistons Custom cut Brian Tooley Cam SW long tube headers 3" stainless mid pipe - Secondary Cat delete - High flow cats Port and polished heads-Double valve springs-platinum lifters & push rods Cam phaser limiter - DOD delete P1SC-1 Pro Charger 3.7 pulley Stage II intercooler 667rwhp 577ft lbs |
|
|
|
|
|
06-19-2018, 08:45 PM
|
#4 |
Drives: 2017 Camaro SS 1LE (F1A-94 FBO H/C) Join Date: Jun 2017
Location: San Antonio Texas
Posts: 843
|
upload a video
__________________
Performance Mods: F1A-94, DSX Flex Fuel Kit, MSD Spark Plug Wires, KOOK 2" off road headers, MBRP Race catback exhaust, Pray Performance Custom Boost Cam, Rocker Arm Trunion Upgrade Kit, 7.850" Hardened Chromemoly Length Pushrods and Johnson Racing 2110R Lifters, TSP CNC'd Heads, Ported MSD intake manifold, 103mm Katech Throttle body, Forged Pistons/Rods, RPM Meth kit, DSX Aux Fuel system, AEM Failsafe and banks gauge, LT4 HPFP, LT4 injectors, BMR motor mounts, Hurst Short Throw, Manley SS exhaust valves
Videos of my car? Check here: https://www.youtube.com/channel/UCNi...Qy1OL4NVGlPogw |
|
|
|
|
06-19-2018, 08:48 PM
|
#5 |
 Drives: 2017 2SS NGM Join Date: May 2012
Location: New Jersey
Posts: 149
|
To the dealer!
|
|
|
|
|
06-19-2018, 09:38 PM
|
#6 | |
   
Drives: 2017 Camaro 1SS M6 Join Date: Apr 2015
Location: Indy
Posts: 2,460
|
Quote:
I checked this when I first bought my car (with 13 miles on it) and the harness on mine was routed incorrectly, which causes it to sit to closely to the AC belt. I routed it correctly as shown in the thread and there's plenty of clearance now. Mine did not show any evidence of rubbing, but was too close to the belt for comfort.
__________________
2017 Camaro 1SS, M6, Hurst shifter, Hyper Blue, NPP, Gray Split Spoke Wheels
Best 1/4 Mile: 12.24 @ 115.9 mph |
|
|
|
|
|
06-20-2018, 09:53 AM
|
#7 |
|
Drives: 2017 Camaro SS Fifty Join Date: Oct 2016
Location: Port St Lucie, Florida
Posts: 966
|
Thanks for the replies. My car is strictly stock with no mods. I have only 5900 miles on it and it has done this off and on since new. I only use Shell or Mobil 93 octane. Now it does it all the time and the backfires are so bad I am afraid something will happen with the engine. I have an appointment with the dealer so we shall see. I did check on that harness and I did not see anything near the belts. I had the A8 shutter now this. Both within 4000 miles.
|
|
|
|
|
06-20-2018, 09:56 AM
|
#8 | |
 Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016
Location: Ocean City, NJ
Posts: 3,174
|
Quote:
The link to the other thread is about damage to the camshaft sensor wires. If it has really been misfiring there should be pending codes you can read. After so many events in so many starts it will throw a CEL. But before that there will be a pending code. |
|
|
|
|
|
06-20-2018, 10:51 AM
|
#9 |
|
Drives: 2017 Camaro SS Fifty Join Date: Oct 2016
Location: Port St Lucie, Florida
Posts: 966
|
I have an OBDII code reader. Not getting any CELs but will check for codes.
No mods to engine. All stock. |
|
|
|
|
06-20-2018, 04:50 PM
|
#10 | |
|
|
Quote:
If you have not been in there messing around a spark plug being broke is not super likely, but still possible. The dealership may have caused it, or just a bad plug up front. The fact that it started small and is getting more consistent could elude to a crack growing.
__________________
2016 2SS/Hyper Blue/M6/NPP/Navi
Forged pistons Custom cut Brian Tooley Cam SW long tube headers 3" stainless mid pipe - Secondary Cat delete - High flow cats Port and polished heads-Double valve springs-platinum lifters & push rods Cam phaser limiter - DOD delete P1SC-1 Pro Charger 3.7 pulley Stage II intercooler 667rwhp 577ft lbs |
|
|
|
|
|
06-20-2018, 05:18 PM
|
#11 |
Drives: 2017 Camaro SS Join Date: May 2018
Location: Portland Oregon
Posts: 151
|
Back in the day High RPM miss was usually Ignition related. Fuel, It fell on its face
|
|
|
|
|
06-20-2018, 05:56 PM
|
#12 | |
|
|
Quote:
__________________
2016 2SS/Hyper Blue/M6/NPP/Navi
Forged pistons Custom cut Brian Tooley Cam SW long tube headers 3" stainless mid pipe - Secondary Cat delete - High flow cats Port and polished heads-Double valve springs-platinum lifters & push rods Cam phaser limiter - DOD delete P1SC-1 Pro Charger 3.7 pulley Stage II intercooler 667rwhp 577ft lbs |
|
|
|
|
|
06-20-2018, 07:08 PM
|
#13 | |
|
Drives: 2017 Camaro SS Fifty Join Date: Oct 2016
Location: Port St Lucie, Florida
Posts: 966
|
Quote:
|
|
|
|
|
|
06-20-2018, 08:31 PM
|
#14 | |
|
|
Quote:
I do not trust the dealership and the dill weeds they hire there. After working for one for five years then moving onto a Cat dealer.. I'm not sure how peoples cars even last on the road haha.
__________________
2016 2SS/Hyper Blue/M6/NPP/Navi
Forged pistons Custom cut Brian Tooley Cam SW long tube headers 3" stainless mid pipe - Secondary Cat delete - High flow cats Port and polished heads-Double valve springs-platinum lifters & push rods Cam phaser limiter - DOD delete P1SC-1 Pro Charger 3.7 pulley Stage II intercooler 667rwhp 577ft lbs |
|
|
|
|
|
|
|
|
|
Post Reply
|
| Thread Tools | |
|
|
