ENGINE DIAGNOSTIC TOOLS
Section 4
6.
Start engine and observe the displayed reading.
The left display indicates RPM, the right the
actual number of degrees off TDC. Allow engine
to reach operating temperature.
IMPORTANT
IF THE MAGNETIC PROBE IS NOT
CLOSE ENOUGH TO THE VIBRATION
DAMPER OR IS NOT CONNECTED
PROPERLY
TO
THE
UNIT,
THE
TIMING UNIT WILL DISPLAY THE
CORRECT RPM BUT THE DEGREES
SHOWN WILL BE THE NEGATIVE
VALUE
OF
THE
OFFSET
PROGRAMMED
INTO
THE
UNIT.
RECHECK
CONNECTIONS
AND
POSITION OF PROBE.
7.
Check initial dynamic timing and advance by
adjusting engine RPM and actuating housing
pressure cold advance solenoid (HPCA).
8.
Repaint the scrapped fuel line when timing
operation is complete, to protect the line against
corrosion.
Figure 11. Design Technology Tech-Time
Model 3354 Connections
CGES-240-4
Printed in United States of America
Page 16
