making custom commander 950 ecm to TPI harness adapter. injector wiring?
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Car: 09 Cobalt SS Sedan. 92 Z28 vert
Engine: 2.0T EFR6758; 5.0TT T3/T4 8psi
Transmission: F40; 700r4
Axle/Gears: 3.76 LSD; 3.23 posi
making custom commander 950 ecm to TPI harness adapter. injector wiring?
the holley commander 950 has 4 injector pins:
D13: Injector A
D14: Injector B
D15: Injector C
D16: Injector D
with the holley tpi harness, each pin drives two injectors, but the factory TPI harness only has 2 injector pins that drive 4 injectors each (left and right banks).
I'm wondering if anyone knows if/which wires can be spliced together off of the HC950 ecu to adapt to the TPI harness.
The rest of the adapter was pretty staight forward and I'm finished assembly all except for the injectors.
my question in short:
HC 950 pin-------->TPI harness
D13: Injector A--->(left or right bank?)
D14: Injector B--->(left or right bank?)
D15: Injector C--->(left or right bank?)
D16: Injector D--->(left or right bank?)
D13: Injector A
D14: Injector B
D15: Injector C
D16: Injector D
with the holley tpi harness, each pin drives two injectors, but the factory TPI harness only has 2 injector pins that drive 4 injectors each (left and right banks).
I'm wondering if anyone knows if/which wires can be spliced together off of the HC950 ecu to adapt to the TPI harness.
The rest of the adapter was pretty staight forward and I'm finished assembly all except for the injectors.
my question in short:
HC 950 pin-------->TPI harness
D13: Injector A--->(left or right bank?)
D14: Injector B--->(left or right bank?)
D15: Injector C--->(left or right bank?)
D16: Injector D--->(left or right bank?)
#2
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Car: 09 Cobalt SS Sedan. 92 Z28 vert
Engine: 2.0T EFR6758; 5.0TT T3/T4 8psi
Transmission: F40; 700r4
Axle/Gears: 3.76 LSD; 3.23 posi
Re: making custom commander 950 ecm to TPI harness adapter. injector wiring?
I called holley tech service and they said the 950 ecu fires the injectors in batch fire, meaning all 8 at the same time. So I wired A&B to one bank and C&D to the other.
I also found out the wiring for the serial connector to the laptop:
HC950_______DB9
A2(BRN)____not used
A3(GRN)____not used
A8(YEL)____DB9 pin 3
A9(ORG)____DB9 pin 2
A12(BLK/WHT)____DB9 pin 5
I also found out the wiring for the serial connector to the laptop:
HC950_______DB9
A2(BRN)____not used
A3(GRN)____not used
A8(YEL)____DB9 pin 3
A9(ORG)____DB9 pin 2
A12(BLK/WHT)____DB9 pin 5
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Car: 91 GTA - 94 TPI Suburban
Re: making custom commander 950 ecm to TPI harness adapter. injector wiring?
Doug_F = Moderator = Holley Engineer
Plus, many knowledgeable members as it pertains to the C950.
Good Luck, Ed
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