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Home >> Volkswagen >> 1985 >> Cabriolet L4-1781cc 1.8L SOHC >> Repair and Diagnosis >> Powertrain Management >> Ignition System >> Ignition Timing >> Specifications >> Ignition Timing
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Ignition Timing

Electronic Ignition System Specifications
(1985-1989, CIS and CIS-E)

Engine Codes JH, PL
Firing Order 1-3-4-2
Ignition Timing
at idle
vacuum hoses
to distributor (engine code JH) connected
to knock sensor control unit (PL) connected
checking 4 to 8°BTDC
adjusting 6 ± 1° BTDC
Centrifugal Advance (engine code JH only)
starts 1050-1300 RPM
degrees advance @ rpm 15-19° @ 2600 RPM
total advance @ rpm 22-26° @ 4500 RPM
Vacuum Advance (engine code JH only)
start 4-8° BTDC (basic timing) @ 120-160 mbar (90-120 mm HG)
total 10-14°BTDC @ 240-260 mbar (180-195 mm HG)