Service Manual
Service Manual
Service Manual
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Disttibutor<br />
lgnition system with contact breaker assembly<br />
Bl2<br />
Check vacuum advance with a vacuum pump<br />
Check dislributor number and iind cotrect ignitlon advance<br />
graph on pages 7 and 8.<br />
Selecl a pressure from graph and punrp !p vac!um<br />
pump to thrs va ue.<br />
Record ignition advance.<br />
Subtract basic ignition setting from recorded ignition<br />
advance and check that va ue conforms to graph.<br />
813<br />
Example: Bosch number 0 231 170 287 on B23A<br />
1981 82 Sweden<br />
You decide to check vacuum advance at 200 mm Hg.<br />
Recorded advance al this pressure is found 1o be<br />
16-21".<br />
Basic lgnition serting : 7'.<br />
D fference - 9 14' which ls as specifiecl.<br />
814<br />
Check vacuum unit for leakage<br />
Connect a vacuum pump. ncrease vacuum to 500 mm<br />
Hg (67 kPa).<br />
Record pressure for 1 minute. Pressure nrusl not drop<br />
by more than 100 mm Hg {13.5 kP.).<br />
Pre-ignition B23A Sweden 1981 82<br />
815<br />
lf, despite use of 98 octafe fue, ensine s prone to<br />
pre-lgnitlon (knocking), igniiion can be retarded to 5'.<br />
lgnition setting can also be retarded lo 2'before T.D.C if<br />
vehicle is required for towing purposes. Noie rhat fue<br />
consumption will increase and that ignit on shou d be<br />
reset to specificalion cluring normal usage.<br />
3r
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