84 Toyota Start and Stall, an EXPERT WITNESS

84 Toyota ignition start stall 84 Toyota Start and Stall, an EXPERT WITNESS

The QCSC DAS SYSTEM --- your 'expert witness'

This 1984 Toyota would start and stall when cold. Notice the difference in spacing between the coil negative firing spikes, this indicates changes in engine speed. Notice the start/stall/restart being caused by the missing coil firings. Note the dwell control signal. The engine revved to 1000RPM and then began to cut-out.

Only the 8 channel QCSC DAS SYSTEM offers voltage, dwell, rpm, and rpm fluctuation all on one screen.

Sometimes when warm, the 84 Toyota would stumble/hesitate. Note the abnormal dwell control, followed by the high spike at the coil negative. A very high resistance in the secondary is reflected in the primary and has degraded the ignition module dwell control signal.

The QCSC DAS SYSTEM has captured and saved both a high resistance in the secondary and the resultant degradation of the ignition module.

The very high resistance in the secondary is reflected in the primary. Below we have shorted the #1 spark plug wire. We then counted 1-3-4-2 and thereby determined that the very high resistance is in the #2 secondary. The dwell control is normal a t this time.

Is your work fully documented? Ever wish you had a witness to verify that intermittent? Do you remember the 'Readers Digest' article?

Learn what computerized diagnostics can do. Now!

CALL QCSC - ASK FOR DAN - ph# 973-472-0328 -- fax# 973-472-5020

EMAIL to; qcscdas@aol.com or; lody@delphi.com or; danbuckley@worldnet.att.net
Please entitle email inquiries -- QCSC DAS
Please visit; QCSC at Delphi or; QCSC at AOL or; QCSC at CIS
or visit; Dan Buckley at ATT or; QCSC DAS at IDT or; QCSC at hometown

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