94 C1500 4.3 sensor wiring ?

[barker23]

I just recently put a different engine in my truck, same tranny and intake tho. I have ended up with a couple connectors that I cant seem to locate the sensor for. Im getting fuel to the intake, but nothing from the injectors and Im not sure if these connectors have something to do with it. Any help would be appreciated.

1st connector: Marked PED 15 on a Red and Blue connector with 1 Green wire and 1 Black wire.
Located on right side of engine behind the A/C drive.

2nd connector: Marked PED 21 on a Black and Blue connector with 1 Blue wire and 1 Purple wire.
Located on right side of engine next to the intake.

3rd connector: Marked PED 2 on a Blue and Black connector with 1 Green wire only.
Located on left side of engine by the exhaust manifold and tied in with a knock sensor.

[J-Ri]

Originally Posted by barker23

I just recently put a different engine in my truck, same tranny and intake tho. I have ended up with a couple connectors that I cant seem to locate the sensor for. Im getting fuel to the intake, but nothing from the injectors and Im not sure if these connectors have something to do with it. Any help would be appreciated.

1st connector: Marked PED 15 on a Red and Blue connector with 1 Green wire and 1 Black wire.
Located on right side of engine behind the A/C drive.

2nd connector: Marked PED 21 on a Black and Blue connector with 1 Blue wire and 1 Purple wire.
Located on right side of engine next to the intake.

3rd connector: Marked PED 2 on a Blue and Black connector with 1 Green wire only.
Located on left side of engine by the exhaust manifold and tied in with a knock sensor.

If you still have it, check the old engine and see if there are sensors where there aren't on the new one. Also if the terminals inside the connectors are old looking and corroded, there's a good chance they weren't connected to anything to begin with. I've had several cars some in my shop that have a connector or two off with nothing that they'll even reach.

[barker23]

Unfortunately I do not have the old block, this has been a on going project and frankly quite a pain in the #@$. It has taken me 3 engines so far to get one that would work and crank over.
I did check for corrosion on the connectors and they all seem to look like they were connected at one time.