LEMON Manuals
: Even more car manuals for everyone
Home
>>
GMC
>>
1987
>>
Jimmy 5.0 H, Automatic
>>
Repair and Diagnosis
>>
Engine Performance
>>
Ignition System
>>
Ignition System - HEI (CARBURETED Models)
>>
Typical Oscilloscope Patterns
>>
Reading Scope Primary Pattern
Reading Scope Primary Pattern
A) Spark Zone
- spark plug arcing.
B) Coil & Condenser Zone
.
C) Dwell Zone
- displays current through coil primary with module activated.