boosted to 26psi Posted August 11, 2014 Share Posted August 11, 2014 i have a 99 impreza obs with the 2.2 phase 2 cali spec. going over the wiring diagram it looks like the injectors are ground fired from the ecu, but have constant power from the main relay pin c1 and c2. at the ecu pin, it looks like it has 12v power at each injector pin a4, a13, a14, a15 until the injector is fired which then the ecu would ground the pin, firing the injector. is this correct? another question is how are they fired. are they batch where unlike most are cylinder 1 and 3 then 2 an 4. are they fired 1 and 2, then 3 and 4. easier way of understanding what im talking about is on an ecu with 2 outputs for injectors. it would fire cylinder 1 on one output then fire cylinder 3 on the other output. Quote Link to comment Share on other sites More sharing options...
Gloyale Posted August 11, 2014 Share Posted August 11, 2014 Ground fired sequentially. Spark however is gang fired 1+2, 3+4 Quote Link to comment Share on other sites More sharing options...
boosted to 26psi Posted August 12, 2014 Author Share Posted August 12, 2014 Ground fired sequentially. Spark however is gang fired 1+2, 3+4 thats what i figured they were. now the ej22 uses the 6/7 signal for timing correct? Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted August 14, 2014 Share Posted August 14, 2014 If you're referring to the crank and cam sensor signals, yes those are used to determine crankshaft angle and cam position to differentiate between top dead center on compression or exhaust stroke. Together they're used to determine ignition timing and the start of the fuel injection sequence. Quote Link to comment Share on other sites More sharing options...
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