Hi!
I've reviewed numerous threads on here re: the P0300 issue, but to no avail. Here's some background:
Vehicle:
- 2005 Chev Aveo
- Manual Transmission
- 182,000 km
Symptoms:
- Idles fine when engine is cold or hot
- No noticeable missing when engine is revved and no load
- Noticeable missing when cold and under load
- Missing less noticeable as engine warms up
- After clearing code, CEL will illuminate and flash between 40 - 60 km/hr with engine between 2,500 and 3,500 RPM and stay flashing until code is cleared
In the last 1,000 km:
- New Alternator
- New Wires
- New Plugs
- New Coil
- New EGR Valve
- New Serp Belt
- New Thermostat
- New Timing Belt/Idler pulleys/water pump/Inner timing belt cover
- Replaced head with all new valves and seals
- New Battery
Troubleshoooting performed:
- Compression Test (#1 190, #2 175, #3 160, #4 180)
- Carb Cleaner Sprayed around vacuum lines and intake (1 Leak found and fixed)
- Misted new wires/coil (no issues)
- Vacuum Lines checked and compared against schematic (no issues)
Anyone have any suggestions for further troubleshooting or potential solutions before I give up and bring it to the *gasp* dealer??
Any help is appreciated.....