Im in the midst of the electrical part and my donor harness on the IK2 plug seems to have 3 different wires that are apart of the speed sensor pinouts 24.25 and 26. Im confused on which to use beings my speed sensor is also on the E5 plug that is used in the ECU. i only have 1 speed sensor wire on my existing harness as well.

 

What colors?

 

Blue, Green and Red and a Pink one coming from the IK@ and the E5 plug is Green and orange. But there is only One pin from the C1 on my 1989 that is for a speed sensor. The 89 has no Tach also. but has a TACH wire on the Harness.

 

Any ideas anybody? Should I just pin all four to the c1 plug?

 

Doesn't your truck have a mechanical speedometer? You shouldn't need to hook up any wires for it to work.

 

Not entirely sure about that but I do have a speed sensor pin on my existing body harness

 

If you have mechanical speedo, the speedo guage sends signal to ecu. If you reuse your transfercase witch has the speed sensor/sending unit, you keep the everything the same and just match the signal wire from the speedo to the plug that goes to the 3.4 ecu.

 

Awesome that's what I ended up doing! Finally got the harness wired up today dropping engin tomorrow. Then it's just a throttle body, intake and some radiator hoses. Anybody have hose numbers that would work?

 

For the radiator hoses I was able to use a stock 3.4 upper and I used a 14in flex hose for the bottom

 

Okay cool, also I was curious. Is the line that connected to the charcoal canister near the hp fuel line the return line? Trying to figure it what the return line connects to.

 

My fuel return line is a hard line running down the passenger side fender well. You have a return line coming off the engine back to the tank.

 

Also one of them is just a vent hose that goes into a hole in the frame. So don't hook the fuel return to that one lol

 

awesome that's the one I'm talking about actually I thought that was this.