Search results

Nope, no difference in how the engine runs.

Same result. No lights on the tester when I hook up the jumper. I'm hooking it up like this, but using a 12V test light in place of a meter. https://www.therangerstation.com/tech_library/images/eec-iv_testing1.gif Connecting this way I get codes with KOEO, but not Engine Running codes

Okay. I've had everything hooked up, then started the engine. Looks like I need to have the engine running (and up to temp), then connect the jumper. I'll give it a shot.

So I recently finished the 4.0 swap into my 84 Bronco II. Okay, I'll be honest, and say I'm not finished. It's running and driving and putting a constant smile on my face when behind the wheel (what a HUGE improvement over the 2.8!!), but I still have wiring to clean up and gauges to get...

Thanks, @franklin2. The ammeter did work with the 2.8L. I'm using the 4.0L alternator and wiring. Is there a way to get this working? Will the 4.0L temp sensor/switch work with the 84 gauge?

I spent time this weekend trying to get gauges working in the dash. I'm wanting to keep all of the original gauges in my 84 Bronco II. I installed the oil pressure sensor from my 2.8L into the 4.0L, so that one was pretty easy (though it's only working intermittently). However, I'm not getting...

WooooHoooo! Fixed! My wife even took it out for it's first spin tonight since the motor swap. I hope to get the second drive tomorrow. So my relay problem ended up being a ground issue, as you all led me to. Specifically, PCM ground. So who's up for a game of "Name That Connector"...

pc = PCM? You need to go a little slower with me 🤔

Yep, this is all from the '92 Explorer. EEC relay is working and sending 12V to the fuel pump relay on the red wire. The EEC grounding the other side of the fuel pump relay may be my issue.

Fuses are good. Even with key off I'm getting 12V to the fuel pump relay on the yellow wire, as I should. I pulled the relay out and put a jumper in the block, and the fuel pump kicked right on. So why isn't it closing when triggered by the power from the eec relay? I would think it's a bad...

Well, ran this test this evening. No welding or fireworks, but also no change. I've gone back a few steps - the fuel pump relay isn't closing. Eec relay is closing and sending voltage to the fuel pump relay, but voltage isn't going through it.

If anyone's going to be guilty of redgreen repairs, it's probably going to be me. Just to clarify... Unplug the capacitor, run a jumper wire with 12V to the wire I unplugged from the capacitor, then jump the starter solenoid?

I'll need some instructions... Where are the pdb diode and noise capacitor?

I think it was exposed out of the split loom just through the process of the engine swap. The loom is brittle, so weaving it down into position I probably broke the loom some. I did ohm the two wires from the crank position sensor back to the edis, and they checked out.

It was bare wire, with the foil shielding around it and the other two insulated wires going down to the crank position sensor.

I'll check grounds next.

Which wire are you referring to?

With the pos lead on the Y wire and the com lead on the red wire, it reads positive voltage.

I think I'm getting closer, but still having troubles. Bronco is currently dead in the water, with no eec relay closure. Last night I had it running with the intention of getting it up to temp and checking engine run codes. While it was warming up I noticed a coolant leak from the water neck...

@bbbc3 What front bumper is that? I have a 84 BII and would like to have something up front as an attachment point. Yours looks nice!