Roy information requested, Cat C-9, S/N 9DG0381, A/R number 249-8278, Build Date
2004 - 04-05, Test Date 2004 - 06-05, Load Power 400 HP, Full Load Speed 2100 RPM,
High Idle 2370 RPM, Low Speed Idle 700 RPM, Boost Pressure 32.5, Fuel Pressure 81 PSI,
Fuel Rate 15.3 GAL/HR, Intake Manifold Temp 120 DEG, High Oil Pressure 47.9 PSI, Low
Oil Pressure 22.5 PSI, Air Intake Temp 122 DEG, Temp Water Pump Inlet 192 DEG F
Air Governor 4N-9680. Question when cold surging of engine, Your are still in the cold mode
on the engine ECM and intake heater will cycle on and off for 13 minutes and things will start
to smooth out. That sounds like what is going on. Dave Atherton Retired Cat Mechanic