| Page 26 - Index - Page 28 |
| Inline 6 and V6 Engines Using Dual Switch Boxes and Six Ignition Coils (continued)
|
Engine will not rev beyond 3000-4000 RPM:
- Connect an inductive RPM meter to all cylinders and try to isolate the problem. If two or more cylinders on the same bank are dropping out, the problem is likely going to be either the stator or the switch box. A single cylinder dropping fire will likely be the switch box or ignition coil.
- Check the stator resistance as given below:
|
| 9 to 16 Amp Battery Charging Capacity |
| |
Wire |
Read To |
Resistance |
|
| |
Blue
Blue/White
Red
Red/White |
Engine GND
Engine GND
Engine GND
Engine GND |
5000-7000
5000-7000
90-200
90-200 |
|
| 40 Amp Battery Charging Capacity |
| |
Wire |
Read To |
Resistance |
|
| |
Blue
Blue/White
Red
Red/White |
Engine GND
Engine GND
Engine GND
Engine GND |
1000-1600
1000-1600
75-90
75-90 |
|
- Connect a DVA meter to the Blue wire and do a running test. The DVA voltage should jump up to well over 200V and stabilize. A drop in voltage right before the problem occurs indicates a bad stator. Repeat for the blue/white wire and compare the readings.
- Connect a DVA meter to the Red wire and do a running test. The DVA voltage should show a smooth climb in voltage and remain high through the RPM range. Repeat for the red/white wire and compare the readings.
|
High Speed Miss:
- Connect an inductive RPM meter to all cylinders and try to isolate the problem. A high variance in RPM on one cylinder indicates a problem usually in the switch box or ignition coil. Occasionally a trigger will cause this same problem. Check the trigger as described above under ‘No fire or Intermittent on One or More Cylinders’.
- Perform a high-speed shutdown and read the spark plugs. Check for water. A crack in the block can cause a high speed miss when the water pressure gets high, but a normal shutdown will mask the problem.
- Remove the flywheel and check the triggering and charge coil flywheel magnets for cracks or broken magnets.
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| Page 26 - Index - Page 28 |
