POTENTIAL CAUSE(S)

CHECK THESE FIRST:

1. INOPERATIVE GLOW PLUGS
Have glow plugs professionally replaced.

2. LOW ENGINE COMPRESSION
Have engine compression professionally improved.

CHECK THESE NEXT:

3. THERMOSTAT STUCK OPEN
Replace thermostat.

4. BAD FUEL INJECTOR SPRAY PATTERN
Have fuel injector professionally serviced.

CHECK THIS LAST:

5. LATE INJECTION TIMING
Have injection timing professionally advanced.