Yes.
The next stop on the troubleshooting train was going to be to verify +12 at the injectors during a no start. But, I haven’t had a no start since July so I decided to have a look at the harness to see if there was anything obvious in there.
I finally got around to pulling the intake to look at the wiring harness underneath.
I did find what appears to be a suspicious looking repair to this blue wire that goes to a ground below.
So far I’ve been unable to determine what that blue wire is.
Just to be sure.
The B-G wire is the +12 from the ign circuit and the W-L and Y go to the ECU where the circuit gets grounded to fire the injectors. So, I need to verify that I have +12 at the B-G wire with the key on.
Is this correct?
The harness at the firewall looks good to me, the rubber boot is still intact and the harness itself appears unmolested.
This has been over my head pretty well from the beginning. Any testing requiring an oscilloscope is definitely outside my ability.
Finally died(temporarily) today, Here's what I found during no start situation:
Had fuel at cold start injector while cranking.
Had spark at plugs
Started checking resistances at AFM:
E2-VS=255Ω (FSM says 200-600)
E2-VC=250Ω (FSM says 200-400)
E2-THA=.430 kΩ, ambient temp. 104° (FSM says 0.9-1.3...
Update: It's hot outside.
I've taken it on several 50 mile+ trips, in the heat of the day and it has not repeated the problem I was having. The only thing that has changed since the last time it died id replacing the o2 sensors. Is it in anyway possible that my problem was caused by a bad o2 sensor?
I'd highly encourage you not to wait on me. I daily drove it December thru most of February without this particular problem reappearing. I'm thinking it's heat related, but it's not gonna be hot here for a couple of months and with gas prices going the way they are, I don't think I'm gonna drive...
Quick update. I've been driving it daily and I finally got a code 28. I'm not sure if a faulty o2 sensor could cause the problem I've had or not but, it gives me somewhere to look.
Yeah, the search function on the forum is the one thing about Mud that isn't great. A quick google search should get you there.
https://forum.ih8mud.com/threads/2uz-v8-conversion-on-an-fj80.480198/
Yes, LS is the many variant GM V8.