Found a bad fuel injector, it was grounding to the case when up to temp.
Replaced both injectors with new ones.
Driveability got better for a while, then the gremlins came back, still going into...

Thanks Carl, I've made a note.

Hi EFI tune, I've got a 7060 that's giving me fits, I would like to get it tested or rebuilt, whatever it takes to make it work right in stock form again. Calpack is a AWUM.
Do you do this stuff, or...

I thought about failure modes a bunch last night, going over all the symptoms I've had in this debacle, the chattering from the fuel pump relay, injectors dumping fuel randomly, loss of idle control...

My apologies for being a salty cracker in the previous post...one little update FWIW.
Stewing in my melancholy I was thinking through the schematics, just rolling the last six weeks over in my to...

Well I'm ready to be done with this adventure.
I've poured all the blood sweat tears and resources into this POS that I care to. It's still f*cked and there doesn't seem to be any way the un-f*ck...

I have one, I ordered it when I replaced all the trans solenoids early on, I didn't know it needed an external adapter piece because of the connector style change and the parts supplier didn't tell...

I'm full time in this thing In-Tech, it sucks to have my house break down on me, but I'm doing the snowbird thing so at least I'm in good weather.
Yes I do have internet (most of the time) I've had...

I changed back to the original AWUM memcal, still had a MIL & low idle, re-seated the chip but didn't bottom it out in the receiver and it was suddenly all good.
I don't know what to think of this...

I found and ordered a replacement DRAC, my testing approach today to start with will be to put my scope on both trans output speed and VSS input to see what I get.
Question on ditching the adapter...

Thanks for the reply's - both.
@ In-Tech I'm running the BAMM now, It's on a Moates adapter with a custom prom for the trans from Sinister performance.
Honestly I had no idea what I was putting in...

Replacement ECU showed up today, engine started right up & ran fine. Now for a road test & see if the trans will shift.
Edit - mixed success. Didn't work so well once I drove it, trans did shift...

I was pretty much just chasing down hunches and trying to verify the condition of things that may have been causing a problem, I don't know that the DRAC should draw any current with power connected...

Tested the DRAC module, first test was to plug into a breadboard and measure current draw on 12V power.
Failed. Module draws no current. Complete open circuit.
I'm using the pinout from the factory...

I put everything back together this morning thinking I'd repaired the bad ground and I was ok. It started and ran fine last night.
It didn't get warmed up to go down to the tank dump this morning...

I'll pull the harness out one more time and look at splices over by the DRAC module and steering column, resistance check on the speed sensor pair look ok, not melted together, broken or going to...

I put a splice to ground for both ECU ground wires and it seems to have the engine running as it should, I can move the ECU around a little bit now and it doesn't affect idle, it does highlight the...

Ok a little more data - the G102 ground was a little bit lazy on the voltage drop test compared to a ground wire to the battery, cleaned it up and it was good after that.
Engine did run better as...

I did mostly use a VOM for resistance when checking circuits Jeff, I scoped output on the trans input speed sensor and the distributor but that's as far as I went with actually looking at running...

Hi folks, I'm asking for guidance here on driveability issues with my motorhome.
The chassis is a '92 Chev P30, drivetrain is /454 engine /4L80E trans/ 7060 ECU with the AWUM calpack. (I also have a...

I'm no windows expert, but check user permissions on your comm port and make sure it hasn't been changed to admin access, also baud rate on the port.

That's the one Carl :-)

Hi all, I found this forum in the course of looking for information on sorting out electrical/driveability issues on my 1992 P30 motorhome.
I've already been able to to narrow down my...