| Page 12 - Index - Page 14 |
No fire or Intermittent on One or More Cylinders:
- If the cylinders are only acting up above an idle, connect an inductive Tachometer to all cylinders and try to isolate the problem cylinders.
- Using a set of piercing probes, check the trigger resistance and DVA output as given below:
|
| |
Wire |
Read To |
Resistance |
DVA |
|
| |
Purple wire
White wire
Brown wire
|
Engine GND
Engine GND
Engine GND |
Open
Open
Open |
3V or more
3V or more
3V or more |
|
- NOTE: These triggers have the bias circuitry built into them, therefore you cannot measure the resistance like you could the older engines. In addition, there are four triggering coils used.
- If # 1 is not firing, disconnect #2 CDM module and see if the #1 module starts firing. If it does, the module you just unplugged is bad. If it does not, disconnect #3 CDM module and see if the #1 module starts firing. If it does, the module you just unplugged is bad.
- If # 2 or #3 are not firing, swap locations with #1 and see if the problem moves. If it does, the module is bad. A continued no fire on the same cylinder indicates a bad trigger.
|
High Speed Miss:
- Connect an inductive Tachometer to all cylinders and try to isolate the problem. A high variance in RPM on one cylinder indicates a problem usually in the trigger or CDM module.
- 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.
|
Four Cylinder Engines
(1991-1995)
Engines Using a Single Switch Box and Four Ignition Coils
|
No Fire At All:
- Disconnect the black/yellow kill wires AT THE PACK and retest. If the engine’s ignition fires now, the kill circuit has a fault-possibly the keyswitch, harness or shift switch.
- Disconnect the yellow wires from the stator to the rectifier and retest. If the engine fires, replace the rectifier.
- Check the cranking RPM. A cranking speed less than 250-RPM will not allow the system to fire properly.
- Check the stator resistance and DVA output as given below:
|
| Motors with Flex-plate Flywheel |
| |
Wire |
Read To |
Resistance |
DVA |
|
| |
Blue
Red
|
Blue/White
Red/White |
5000-7000
125-155 |
180V or more
25V or more |
|
Motors with Cast, Vented Flywheel |
| |
Wire |
Read To |
Resistance |
DVA |
|
| |
Blue
Red
|
Blue/White
Red/White |
3250-3650
75-90 |
180V or more
25V or more |
|
Motors with Red Stator
|
| |
Wire |
Read To |
Resistance |
DVA |
|
| |
White/Green |
Green/White |
500-700 |
180V or more |
|
Red Stator Adapter
|
| |
Wire |
Read To |
Resistance |
DVA |
|
| |
Blue
Blue(Each) |
Blue
Engine Ground |
Open
Open |
180V or more
180V or more |
|
No fire or Intermittent on One or More Cylinders:
- If the cylinders are only acting up above an idle, connect an inductive Tachometer to all cylinders and try to isolate the problem cylinders.
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continued next page....
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| Page 12 - Index - Page 14 |
