ENGINE DIAGNOSTIC TOOLSSection 46.Start engine and observe the displayed reading.The left display indicates RPM, the right theactual number of degrees off TDC. Allow engineto reach operating temperature.IMPORTANTIF THE MAGNETIC PROBE IS NOTCLOSE ENOUGH TO THE VIBRATIONDAMPER OR IS NOT CONNECTEDPROPERLY TO THE UNIT, THETIMING UNIT WILL DISPLAY THECORRECT RPM BUT THE DEGREESSHOWN WILL BE THE NEGATIVEVALUE OF THE OFFSETPROGRAMMED INTO THE UNIT.RECHECK CONNECTIONS ANDPOSITION OF PROBE.7.Check initial dynamic timing and advance byadjusting engine RPM and actuating housingpressure cold advance solenoid (HPCA).8.Repaint the scrapped fuel line when timingoperation is complete, to protect the line againstcorrosion.Figure 11. Design Technology Tech-TimeModel 3354 ConnectionsCGES-240-4Printed in United States of AmericaPage 16
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