MSgpio.com read only forums (Jan.15,2018)

What's the best way to test the pressure control solenoid output is working properly? I am suffering with maxed line pressures on my 4l80 and I am struggling to find the cause. The PCS resistance is within tolerance, 4.2 ohms I have verified I have 12volt to one pin of it on pin c and that I have a ...

Took my Camaro for it's first drive today, the motor is running well (MS3X) but I really need to dial in the transmission so I can drive it any distance. I'm getting a good solid VSS signal, so that's something! :D I have attached my current MSQ. 2 real issues: 1. I have very firm shifts - this may ...

Driven the car on the road today and 1st gear is working fine now - expect it was something mechanical - could have been as simple as one of the checkballs was still stuck in the vaseline or something. I don't know but it's working now... However I have some tuning issues now that I need some help w...

Oops. Here's the log.

I'll see how the load goes with it on KPa.

Log attached, shifting much better, but still missing first gear...

I think I have figured this out, well half of it.... It was shifting late because it was still using map as load even though I had changed the project properties to TPS. I've reloaded code again, created another new MSQ and it seems to be shifting as per the map now. Only thing is I still don't have...

Hi Lance, Thank you :) It does indeed look like its defaulting to use shift table 2, rather than table 1. The 2wd/4wd is floating at the moment, I had intended to use it to provide a 'Sport' mode via a toggle switch. Looks like it works opposite to what I thought. Presumably if I ground this wire it...

Right... some progress. I noticed that my speed was stuck at 5mph with the sensor disconnected. Couldn't find any faults so I removed the DRAC and connected directly back to the VSS and now have a better speed signal. Perhaps there was an issue with the way my DRAC was installed. Now have better spe...

Thanks Lance. I might experiment with changing my load to TPS as in the past I have preferred how the shifts happen like this. I know that my TCC is stuck locked at low speed at the moment, this might be why the RPM's look wierd at the shift from 1st to second as I expect it's unlocking as it shifts...

I noticed when datalogging that the 'upshift req' is permanently on in the log...

Any ideas why?