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'''This page documents several types of coil over plug items.''' ---- '''Subaru''' I've got some COPs for a Subaru. Here is an [http://www.kikine.com/nick/cars.jpg hi-rez image] Part number: 22433AA330 http://www.vems.hu/files/COILS_COPS_etc/subaru_cop.jpg Diamond (denso logo; made in Japan) F-645 12V Use with transistor ignition 9002530 (this is a build or serial number as they are all different) There are 2 wires on the unit. Yellow and red. Resistance is 0.9 ohms - in both directions (?). There is infinite resistance between the ground screw and either of the 2 leads. Very likely, this must be a dumb coil. Can you measure inductance? Apply 0.8 .. 1msec dwell (first, only increase dwell if results justify) (with some sparkgap there) and measure current rampup with scope or DVM (check DummyIgnition): * Apply a 0.1 Ohm series R (or a calibrated wire) to measure current rampup with scope * apply a known constant freq and known constant dwell and measure supply consumption with DVM: the max current (and therefore L) can be calculated. ---- '''VAG''' http://www.vems.hu/files/sly/cop_mm.jpg http://www.vems.hu/files/COILS_COPS_etc/vw_cop_06b905115e_sch.gif 1J0 973 724 is the 4-pin plug for the VW coil 4D0 906 232 is the 3-pin plug for the VW coil * Is the 4pin VAG COP passive? PeepPaadam I heard some of these part numbers might be the connector, not the transformer. Double check. The coil in the 1.8T 20V (1998-2001) is called 058 905 105 (3-pin?). I think Dave, Jorgen and Sly collected info about many (mainly VAG) TODO: find it in the wiki and move or link. I'm afraid they dumped it (zzz) to some MembersPage (or even irc). A [http://vagner.jeje.je/bilder/albums/album113/AEB_ignition_schematics.jpg A4 schematic] that uses these kind of transformers. ---- '''See also''' * back to IgnitionPage * DummyIgnition
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