GxT Ferret 54 ENGINE DIAGNOSTIC CENTER - Manual (Page 64)

5-3
TYPICAL DIS READINGS
The primary readings listed below are for your convenience, and are the result of our own
Field Testing. Variations of
±
10% should be considered normal. We strongly suggest you
test some known good vehicles to get a feel for the readings. Refer to previous page for
Starting/Charging and Power test readings, which are the same for DIS and Distributor
engines.
Company/Engine Amps Build
Ford Motor Company Peak mSec.
1.9L - I4 5.0 3.1
3.0L - V6 5.0 3.5
3.8L - V6 5.0 3.5
4.0L - I6 5.0 3.5
4.0L - V6 5.8 3.6
4.6L - V8 5.5 3.3
_________________ ___.__ ___.__
_________________ ___.__ ___.__
Chrysler Corporation
3.3L - V6 5.0 4.0
3.5L - V6 5.0 4.0
3.8L - V6 5.7 3.8
_________________ ___.__ ___.__
_________________ ___.__ ___.__
Company/Engine Amps Build
General Motors Peak mSec
2.0L - I4 8.0 3.0
2.2L - I4 9.0 3.0
2.3L - I4 (Quad 4) 8.0 2.5
Other DIS 4 Cylinders 9.0 3.1
3.0L - V6 6.5 3.8
3.1L - V6 10.0 2.8
3.8L - V6 (Type I) 7.0 3.8
3.8L - V6 (Type II) 9.5 3.0
Other DIS 6 Cylinders 9.0 3.1
_________________ ___.__ ___.__
_________________ ___.__ ___.__
Saturn
1.9L - I4 7.6 3.3
_________________ ___.__ ___.__
IGNITION PRIMAR
Y
IGNITION
SECONDAR
Y
Measurement Typical Readings Interpretation
Primary Amps More than 4, uniform If all are low, check primary circuit connections.
among coils. If one is low, check module.
Build Time 3-4 mSec, uniform If longer, check module and connections.
among coils. If shorter, check coil.
Firing KV 5 to 10 KV at steady If higher, wide gap, broken wire, or lean fuel mix.
RPM with no more than If low, fouled plug, secondary insulation failure,
5 KV difference among or low compression.
cylinders.
Exhaust KV Less than 4 KV. If higher, check for wide gap or broken sparkwire,
or fouled plug on opposite side.
Burn Time Uniform among cylinders If shorter, check for breaks in secondary wires,
If longer, check for fouled gaps or insulation
shorts.