CAMARO6 - View Single Post - Well-known vibration issue suddenly "went away"?

grampa_ss · 12-18-2018, 10:41 AM

The NPP valves may not cause the whole car to shake...but they cause some vibration/sound at cruising speeds (at least on mine it did). I know this because it happened to me. I had put fuse 51 back in to play with the stealth settings and then forgot about it. I was driving on the highway and noticed a small vibration/hum while at highway cruising speeds. I thought I had the TC shudder. Then I remembered I had put that fuse back in..Duh. Pulled it out and sound/vibration was gone. Apparently the valves close a little (even in track mode) while cruising on the highway.

12-18-2018, 10:41 AM	#6
grampa_ss Drives: 2016 Camaro 2SS Join Date: Apr 2017 Location: Stansbury Park, Utah Posts: 1,102	The NPP valves may not cause the whole car to shake...but they cause some vibration/sound at cruising speeds (at least on mine it did). I know this because it happened to me. I had put fuse 51 back in to play with the stealth settings and then forgot about it. I was driving on the highway and noticed a small vibration/hum while at highway cruising speeds. I thought I had the TC shudder. Then I remembered I had put that fuse back in..Duh. Pulled it out and sound/vibration was gone. Apparently the valves close a little (even in track mode) while cruising on the highway. __________________ 2016 2SS, MRC, NPP, A8. Procharger P-1X,Stage II,std bypass, 3.9, Alky Meth - 10.84 @129 - DA+2000 New Mods - GPI drop ins, Kooks 2", LT4 fueling, Cam, Circle D Converter, 3.5 pulley & dual nozzle meth.