timing problem with knock

robertsws · 09-04-2009, 03:40 PM

OK, so I took out the CPS, spun the sprocket around one whole turn, until the hole lined up with the groove again, re-installed it and checked timing. I was now able to time it to spec. So timing is not an issue anymore. However I still have that steady repeating pinging that increases with RPM. Only now I'm not sure if it's really coming from my #5 cylinder. It certainly sounds louder and clearer over my #5 cylinder, however I can hear it on any metal suface of the engine, including the turbo. I'm going to re-check my valve clearances next.

09-04-2009, 03:40 PM	#2
robertsws 3" Exhaust Join Date: May 2008 Location: Gaithersburg, Maryland Posts: 63	OK, so I took out the CPS, spun the sprocket around one whole turn, until the hole lined up with the groove again, re-installed it and checked timing. I was now able to time it to spec. So timing is not an issue anymore. However I still have that steady repeating pinging that increases with RPM. Only now I'm not sure if it's really coming from my #5 cylinder. It certainly sounds louder and clearer over my #5 cylinder, however I can hear it on any metal suface of the engine, including the turbo. I'm going to re-check my valve clearances next. __________________ 1991 Supra - Turbo - 5spd 60-1 upgraded turbo Lexus AFM 3" exhaust, 4" tip SAFC 2 550cc injectors (2 sets, venom direct fit, RC engineering) 2.5" intercooler and piping Aluminum radiator w/dual electric fans ARP bolts w/MHG Full-auto turbo timer Fidanza Flywheel & Stage 2 Clutch spark plugs and wires. power steering pump cold temp start switch engine top end rebuilt transmission opened up and inspected at a tranny shop when the flywheel and clutch installed last week.