Golf GTI L4-1781cc 1.8L SOHC (RD) (1987)
Spark Plug: Specifications
CIS-E (Engine Codes HT, RD, PL)
Firing Order ....................................................................................................................................................................................................... 1-3-4-2
Ignition Timing .................................................................................................................................................................................... 6° +/- 1° BTDC
(vacuum line to ignition control unit connected)
Engine Idle Speed ................................................................................................................................................................................... 800 - 900 rpm
Engine RPM Limit
Engine HT .................................................................................................................................................................................. 6200 - 6400 rpm
Engine RD .................................................................................................................................................................................. 6570 - 6630 rpm
Engine PL ................................................................................................................................................................................... 7200 - 7300 rpm
Ignition Coil Resistance (exc. 16v)
Primary (terminals 1 and 15) ...................................................................................................................................................... 0.52 - 0.76 ohms
Secondary (terminals 1 and 4) .................................................................................................................................................. 2400 - 3500 ohms
Ignition Coil Resistance (16V)
Primary (terminals 1 and 15) ...................................................................................................................................................... 0.60 - 0.80 ohms
Secondary (terminals 1 and 4) .................................................................................................................................................. 6500 - 8500 ohms
Spark Plugs (Engine HT / RD)
Bosch ....................................................................................................................................................................................................... W7DTC
Beru ....................................................................................................................................................................................................... 14-7DTU
Champion ................................................................................................................................................................................................... N8GY
16V (Engine PL)
Bosch ........................................................................................................................................................................................................ F6DTC
Spark Plug Gap ................................................................................................................................................................. 0.7 - 0.9mm (.027 - .035 in)