My poor 2000 Celica GT -- 1ZZ-FE engine This was all the result of cylinder 4's spark plug failing (basically exploding), in turn destroying the ignition coil, itself ...
Toyota 18RG Twin Cam 2 Ltr In line 4 cylinder engine. MSD 6A Ignition with Blaster 2 Coil. TRD style headers from Toysport. No exhaust system after headers.
take the valve cover beather off and reconnect to carb vacuum via pcv
valve. you will have better high rpm power with the crank case under
vacuum. my first car was a 71 celica with a 18rgu that trd did intake
valves, steel crank and balanced. thing screamed past 7500 rpm and never
healed over...still have the service manual for the 18rg.