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Old 05-18-2018, 04:35 PM   #51
ZVOLV
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Originally Posted by PromiseRing View Post
NO the ecu powers up the FPR which powers the RSR.


That's what I believe to be the case also. That's why I changed my test recommendation to what I just said in post 49.

Unplug the ECU and then power up the injector positive side of the circuit with one of several methods such as a jumper wire, a power probe, or my preferred method: open the relay and pinch the contacts closed.
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Old 05-18-2018, 07:31 PM   #52
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Well, I tested the resistance to the injector positive wire with the ECU connector removed, so I assume it's wiring-related.
I opened up the harness and found the covering on the part where the injector ground wires combine was split and the bare wires were exposed. That doesn't explain why they were getting power, though, since none of the other wires were damaged. However at that point, there was no continuity between the injector positive and ECU pin 13.
Tomorrow (if it isn't raining AGAIN) I'll pull apart each individual injector harness and make sure there isn't any damage.
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Old 05-19-2018, 03:12 PM   #53
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Pinched the fuel injector relay and I have voltage with the ECU disconnected.
After putting the harness back, I still have ~9 ohms on the injector control to ECU pin 13. I realized after disconnecting ALL of the injectors, it went to open circuit. Once I plug in one injector, it goes to 13-14 ohms, and decreases as I continue to plug in each injector.

I tested resistance on the cylinder 1 injector (I'll test the others once I have some specs) and it showed ~2.5 ohms. What kind of reading am I supposed to see?
It seems that maybe my injectors are the reason there is power at both terminals.
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Old 05-19-2018, 03:26 PM   #54
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Doh! Yeah there will be 12v on the injector negative if it's plugged in!

Keep searching.
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Old 05-19-2018, 05:01 PM   #55
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Okay, so there isn’t a problem! I was just driving myself nuts trying to figure that one out.
So maybe it’s just my ECU? I don’t know what else it could be.
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Old 05-19-2018, 05:27 PM   #56
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Well you also said it doesn’t run off of starting fluid right? So there’s more than one issue at stake here.
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Old 05-19-2018, 06:18 PM   #57
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Well you also said it doesn’t run off of starting fluid right? So there’s more than one issue at stake here.
That may be because of the ignition timing. I haven't adjusted it since replacing the distributor, for obvious reasons. I'm really not concerned too much with that right now... I'm concerned about the lack of injector pulse.

Now... I'm just realizing, shouldn't the injectors have less than 12 volts because of the resistor?
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Old Yesterday, 11:42 AM   #58
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Bypassed the RSR, no changes.
I’m really thinking I just have two dead ECUs. There’s nothing else I can think of that could be wrong. Although it seems weird that injector pulse is the only thing not working on this ECU.
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Old Yesterday, 04:52 PM   #59
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What reasons would LH 2.2 have to prevent injector pulse/ground? I can’t think of anything at all.
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Old Yesterday, 09:51 PM   #60
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What reasons would LH 2.2 have to prevent injector pulse/ground? I can’t think of anything at all.
Quick question, what are the last 3 numbers on your ECU?
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Old Yesterday, 11:12 PM   #61
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Quote:
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Quick question, what are the last 3 numbers on your ECU?
Last 3 are 541.
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Old Today, 12:22 AM   #62
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Okay just making sure. AFAIK that’s the only lh2.2 turbo ecu (could be wrong). And I’ve read they’re extremely reliable. I doubt either of your ECUs are bad.
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