GxT Ferret 63 DIAGNOSTIC ENGINE ANALYZER - Manual (Page 21)

Press START
Use SELECT to choose between the automatic sequence
test, "Auto-", and the manual cylinder selection "Manual".
Then press START.
Refer to the vehicle service manual.
Allow the RPM to appear and stabilize before pressing
START.
In "Auto-", pressing START begins the automatic ignition
suppression cycling of 5 seconds applied and 5 seconds
recovery.
After each suppression cycle the RPM % Drop is shown
along with the ending RPM. When all have been tested
it will show:
The cylinder power drop data is arranged by the firing
order sequence (top: 1,2,3,4; bottom: 5,6,7,8).
If more than 8 cylinders are tested the data will be shown
in sets called "Bank A" and "Bank B".
Press START to see each set displayed.
TEST VARIATIONS
The analyzer will check for signals from the ignition. Both
a Spark Pickup and Coil Primary TACH signal from an In-
ductive discharge ignition with a distributor are necessary.
If the signals do not match, the analyzer may show:
or other indications of problems.
If the test was run once already, the operator will be
asked to press SELECT for a new test, and thus erase
the past saved data, or to press START to review the
previous test results.
A throttle position holding tool should be used. The ana-
lyzer will not work over 3000 RPM for 8 cylinder engines,
nor 6000 for 4's. Others are proportionately limited.
In "Manual", pressing START shows the "Manual Kill"
display with a firing order sequence number. Use SE-
LECT to choose a cylinder and press START to have it
suppressed for 5 seconds.
Repeat the test using SELECT and START.
Results are not saved in memory.
Press MESSAGE if "msg" is present.
Low power occurs from a drop less than 1/3 of the aver-
age.
RPM may increase if a cylinder had been firing too
soon.
The following message indicates that during the test the
last cylinder "Start RPM" had changed too much from the
first. Too much change suggests that the test should be
rerun to see if it gives the same results. Try to find the
cause of the change.
==== POWER BALANCE ====
-RUN with Engine Warm-
SELECT: Auto-
TEST then START
Disable Engine Control
Turn FAN & LIGHTS ON HI
Check Connections!
-Run Engine-
SELECT: run NEW TEST
START: view OLD DATA
-19-
(POWER BALANCE)
1280 Start RPM DROP %
1088 End Manual Kill# 1
Low POWER Cylinder
Seq. # 5
RPM INCREASED
Seq. # 3
RPM SETTING Drifted
1262 RPM Bat 14.15
Set RPM at 1000 to 2000
1280 Start RPM DROP %
1088 End Auto-Kill # 1
PWR-BAL 13 9 - 3 12
% DROPmsg 2 11 Bank A