Odd data logged to/from PCM, Gen iv e38
Thread Starter
Teching In
Joined: Aug 2019
Posts: 36
Likes: 2
From: Goodyear, AZ
Odd data logged to/from PCM, Gen iv e38 Seems I am having two odd readings which I think are software related to HPTuners Scanner 4.4.2, but I can’t think of a way to confirm.
The first, when logging tsp position, KOEO, the signal bounces erratically from 0 to ~22%, with no accompanying movement of the throttle itself. Pedal position remains 0%. Once started, it shows similar data in the live feed, but not a 20% swing. Once saving the log and reading the data, this is not the case. It seems to only happen in the live feed. So far I have dismissed this as a non-issue, but wondering if that is a mistake.
The second is similarly odd. With KOEO, my ‘Brake Applied’ perimeter works properly and registers correctly. Once the engine is started, it retains the status from just before the engine sees rpm...so holding the brake and starting as normal means the perimeter stays on and does not change. Same when starting without the brake applied....stays in not applied status. This includes with gear changes or increase with rpm. When I stall the engine, the perimeter goes back to working correctly.
Should I be concerned with these issues, or dismiss them as weird issues with the scanner software? A minor bug within 4.4.2? Any ideas on what i can do to resolve it?
This is a L77/6L80e out of a 2014 Caprice PPV installed in my '71 C10. Been trying to make a safe base tune to get to the local tuner.
The first, when logging tsp position, KOEO, the signal bounces erratically from 0 to ~22%, with no accompanying movement of the throttle itself. Pedal position remains 0%. Once started, it shows similar data in the live feed, but not a 20% swing. Once saving the log and reading the data, this is not the case. It seems to only happen in the live feed. So far I have dismissed this as a non-issue, but wondering if that is a mistake.
The second is similarly odd. With KOEO, my ‘Brake Applied’ perimeter works properly and registers correctly. Once the engine is started, it retains the status from just before the engine sees rpm...so holding the brake and starting as normal means the perimeter stays on and does not change. Same when starting without the brake applied....stays in not applied status. This includes with gear changes or increase with rpm. When I stall the engine, the perimeter goes back to working correctly.
Should I be concerned with these issues, or dismiss them as weird issues with the scanner software? A minor bug within 4.4.2? Any ideas on what i can do to resolve it?
This is a L77/6L80e out of a 2014 Caprice PPV installed in my '71 C10. Been trying to make a safe base tune to get to the local tuner.
Teching In
Joined: Aug 2019
Posts: 17
Likes: 0
From: Novi, Michigan
Thats weird if the latest software didn't fix it. Maybe it could be the way your parameters are setup interfering with one another? I know when I added my Wideband gauge to read in hptuners it stopped a week later so I had to go and re add it.
Thread Starter
Teching In
Joined: Aug 2019
Posts: 36
Likes: 2
From: Goodyear, AZ
ya, it also did it on my ATS when i connected it. strange for sure, but i am thinking its a non issue at this point.
when you say add parameters, are you referring to the channels list on the left side of the scanner?
when you say add parameters, are you referring to the channels list on the left side of the scanner?
Teching In
Joined: Aug 2019
Posts: 17
Likes: 0
From: Novi, Michigan
Yes, I re-did the channel list and also had to re-do it on the main screen gauge in the center.
