Well here goes. I'll try to explain this right. I have a 92 firebird that had a V6 in it. I swapped it out for a 350 along with the wiring harness under hood. My problem is that the V6 did not require a VSS buffer but the V8 does. So my wiring under dash stayed the same. Since the v6 didn't have the buffer wiring I have no connector going to the ECM. My v8 has the purple and yellow wires coming from the vss to the ecm. How do I know where to connect the wires under the dash if I put a yellow buffer there, where to connect them to the ECM on the inside?

 

What ecm is the v8 now ? Assuming you went from a 1227730 3.1 to ?

 

I think it is a 122747.

 

It's also a TBI.

 

Didn’t expect a truck ecm,

 

Vss to ip goes through c207 , ecm is pin A10.

 

That's the ecm the guy who burns my chips said to use. The purple and yellow wires coming of the buffer to the ecm are what I don't have since the v6 didn't need them. So I need to know where to hook them up on the ecm. Thank you.

 

B11 at the old ecm

 

Thank you. I also need that pigtail or wire harness that comes off the buffer, haven't been able to find one since I don't have a part number.

 

You can use a Dakota Digital sgi-100bt for calibration for tires or rear end ratio change. Or @firebirddude142 probably has a used pigtail.

 

Are you saying that I need the old ecm to find the B11 pin?

 

output from buffer to c207 pin K

 

Thank you for all your help.

 

I cannot find a wiring diagram to show me the pin location, color of wire or number location at the computer. Can you help?

 

A10 of the 747 ecm
post 6

 

I appreciate your help but that really doesn't tell me anything without a wiring diagram to tell me where those positions are at.

 

where’s the guy who suggested this ecm ?buy a fsm, google the pinout.https://googlethatforyou.com?q=1227747%20pinout
Or actually look at the connection it has the letters on it 😆

 

Thank you very much.

 

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