Replaced all 8 ignition coils. Got a cylinder 1 and 2 misfire the other day after cold start. Checked the freeze frame and saw everything looked normal (fuel trims, etc.).
Started it up a few times after that and got no issues, but wife said it happened more than once. I knew the plugs were good and assumed the injectors were good because I cleaned them not too long ago. I figured the 246K mile coils would be the likely culprit.
Bit the bullet and purchased 8 brand new OEM Denso coils from Rockauto. Saw the "OEM Toyota" coils on ebay and after further research, discovered they are all fakes unless they are at least $55 per coil and from a reputable seller/dealership.
Installed all 8 yesterday and it's crazy to say but it runs better than ever. What was also fixed was a slight stumble which was present at idle is now completely gone. Externally coils looked pretty good but considering this thing was a family hauler which sat in car lines and did tons of major highway trips over the 245K miles, they provided a good long life worth of service.
Started it up a few times after that and got no issues, but wife said it happened more than once. I knew the plugs were good and assumed the injectors were good because I cleaned them not too long ago. I figured the 246K mile coils would be the likely culprit.
Bit the bullet and purchased 8 brand new OEM Denso coils from Rockauto. Saw the "OEM Toyota" coils on ebay and after further research, discovered they are all fakes unless they are at least $55 per coil and from a reputable seller/dealership.
Installed all 8 yesterday and it's crazy to say but it runs better than ever. What was also fixed was a slight stumble which was present at idle is now completely gone. Externally coils looked pretty good but considering this thing was a family hauler which sat in car lines and did tons of major highway trips over the 245K miles, they provided a good long life worth of service.