1996 4.3 to 1997 5.7 engine swap

[Wesbent]

Well I have 12v to the crank sensor and 5.5v going to the computer don't know if that is correct or not, power to the computer but don't know if the right wires, pulled the harness off the 4.3 they all look the same, so I am puzzled.

Jeff i just did the same exact swap with same results. What was the fix for yours?

 

[EMartinez224]

thank you all, I will do more testing and get back with you.

Good afternoon jeff,
did you ever get your swap to work ?
I am currently going through the same issue.

 

[EMartinez224]

Jeff i just did the same exact swap with same results. What was the fix for yours?

Good afternoon Wesbent,

Did you get your swap to work ?
I am currently going through the same issue with my swap.

 

[GovtCheck]

I’m guessing y’all scrapped them after you got no fire to the plugs? Just curious because I’m having the same exact issue. I don’t have connector c200 plugged in because I don’t have the schematics for a 96 4.3 to match up but I’m guessing that’s my problem.

 

[Schurkey]

I’m guessing y’all scrapped them after you got no fire to the plugs? Just curious because I’m having the same exact issue. I don’t have connector c200 plugged in because I don’t have the schematics for a 96 4.3 to match up but I’m guessing that’s my problem.

If you have spark at the coil, but not at the spark-plug end of the plug wires, the problem is not in C200, it's between the coil and spark plugs:

Coil wire, cap, rotor, plug wires.

 

[GovtCheck]

I’ve changed three distributors and tested one in a different vehicle. All work fine

 

[GovtCheck]

Sooo I’m thinking the c100 pins are in different locations. Anyone have a c100 diagram from a 96 4.3??