Guys
This is driving me crazy!
Car misfires only on #5 Plug under load climbing hills, when downshifting on the Interstate.
Some info
- Car is all stock. with 122k miles on it
- Did the LIM at around 100k miles including
- Plugs - factory iridium
- Wires - ACDelco
- Hoses/thermostat/coolant/aluminum elbows
At 120k Replaced both O2 Sensors
Still running original coils.
Checked the #5 plug gap perfect.
I still have the factory metal shield around all the plug wires.
Can runs great all other times.
