4 injectors but only 3 drivers for the 4 cyl and only 2 drivers for the 6 cyl. Can anyone shed some light on this?
Vic in Phoenix
dohcrt@cox.net
91 Spirit R/T x4
92 Spirit R/T x2
89 CSX
88 CSX-TIII
84 Rampage TII
97 Ram (Buzzin Half Dozen)
69 Dart GT 'Vert
There appear to be more than one switching transistor or what ever under each heat sink. Maybe voltage regulator or ignition coil switches etc.
That's why I started this whole thread. Looking at the wiring diagram the 88 and 89 Smecs only have 2 injector drive wires. These 90 and 91 Sbecs have 4. Sbecs with a turbo have 3 heat sinks with what appears to be 6 switching transistors under them. Sbecs with a 3.0 v6 have 2 heat sinks with 4 transistors. Definitely something I don't understand going on there.
Well I plugged the socketed V6 sbec into my car and it started right up - on three cylinders. Snap on scanner auto identified as 90 2.5 turbo truck lol. I let it idle and it set code 27 - injector 4 fires improperly. At least my socketing skill seems to have passed the grade. Now on to socket the correct sbec.
I think the 16 valve cars have 4 coils. Fired in pairs so only two control wires.
Attachment 63219
92 Spirit R/T SBEC
Vic in Phoenix
dohcrt@cox.net
91 Spirit R/T x4
92 Spirit R/T x2
89 CSX
88 CSX-TIII
84 Rampage TII
97 Ram (Buzzin Half Dozen)
69 Dart GT 'Vert
FWIW, I've seen SBECs with 4 heat sinks on them before.