Engine Adjustment
Diagnosis - Engine Adjustment
Single/dual ignition systems
WARNING: Static high-voltage distribution only possible with HHT.
The test is comprised of the following:
a) Dwell
b) Ignition timing
c) On-off ratio control
NOTE:
The following should be noted on engines with dual ignition systems (engine 119 CFI, engine 119 LH-SFI and 120 LH-SFI):
- Engine analyzer should be set to 4 cylinder position (engine 119) or to 6 cylinder position (engine 120).
- Connect dual ignition adaptor and set to T1/1 position.
- Engine at idle.
- Compare dwell value of T1/1 with test data.
- Set dual Ignition adaptor to T1/2.
- Engine at idle.
- Compare dwell T1/2 with test values.
a) Dwell
Dwell:
- The idle speed control can be checked with the dwell test program on engines 102 and 103. In this case, the dwell % measurement is used as an on-off ratio measurement. For the measurement use test cable 102 589 14 63 00 or 103 589 00 63 00.
- Test and adjustment data. Test and Adjustment Data [Specifications]
b) Ignition timing
Ignition Timing:
By switching the trigger clamp from cylinder 1 to cylinder 2 on Engine 119, an Ignition timing comparison measurement can be made. Subtract 90° from the indicated measurement value to determine the correct specification. This will show any defects in the segments on the starter ring gear.
c) On-off ratio
