Scan9495 problem

[Darrenmb]

Hi guys...
I am having a problem with my new transmission, ( for anyone not familiar with my setup, its the drivetrain and pcm from a 94 formy) it seems to get engine braking as soon as hits 4th gear, trans shop suggested it may be tps, so i hooked up the laptop and went for a drive, when i got it back home i tried to watch the saved file and it gave me an index error then says unhandled exception has occured conversion from string tps angle%(raw) to type double is not valid.

I am guessing trans shop may be onto something, but i can watch the tps in real time and it sweeps smoothly from 0 to 100. However it hits 100 at maybe 98 percent of pedal travel, pushing pedal the rest of the way down does not increase the percentage past 100, but does continue to increase voltage, about another 1/2 of a volt..
I only get the error if trying to open a driven scan, if car isnt driven during scan i have no issues opening it. If i post my file can someone try to open/ interpret it?

Thanks

Darren

[Injuneer]

Let's see if the author of Scan9495 can help.
GaryDoug

[GaryDoug]

Hi guys...
I am having a problem with my new transmission, ( for anyone not familiar with my setup, its the drivetrain and pcm from a 94 formy) it seems to get engine braking as soon as hits 4th gear, trans shop suggested it may be tps, so i hooked up the laptop and went for a drive, when i got it back home i tried to watch the saved file and it gave me an index error then says unhandled exception has occured conversion from string tps angle%(raw) to type double is not valid.

I am guessing trans shop may be onto something, but i can watch the tps in real time and it sweeps smoothly from 0 to 100. However it hits 100 at maybe 98 percent of pedal travel, pushing pedal the rest of the way down does not increase the percentage past 100, but does continue to increase voltage, about another 1/2 of a volt..
I only get the error if trying to open a driven scan, if car isnt driven during scan i have no issues opening it. If i post my file can someone try to open/ interpret it?

Thanks

Darren



Yes, post the scan file and the error message, as complete as possible. Are we sure this is a engine from an F-body car?

[Darrenmb]

I have a new problem.... i cannot upload the file, its on my pc, and i cannot remember my password. My phone stays logged, so thats how i am posting this.
I do not see a reset password box anywhere.. anyone know what i need to do?

[Darrenmb]

39493
In the mean time here is the error message.

[Darrenmb]

And then 39494

[Darrenmb]

Ok, i emailed the file to myself, but one phkne cannot see a way to attach it to a post, i can attach pics, or videos, or url links, do i need to be on a pc? Or do i maybe not have permission to post a file?

[Jakegsxr11]

I don't think you can post files. You will need to upload the file to a hosting site and provide a link for us to access our.

Sent from my GM1917 using Tapatalk

[Injuneer]

Just to keep this up to date, I received the Scan9495 data log file from Darren and we've been going back and forth on it. Also received a video of Scan9495 showing TPS volts vs. TPS % and it contradicted the data log numbers. I think I know why, but I'm reviewing it with GaryDoug to make sure I am not overlooking anything.

If we resolve it, we'll post the solution for the record, and future reference.

[Darrenmb]

I dont think tps is my transmission issue as i can watch 4th be commanded but then i get a freewheeling sensation like being in neutral, push gas a bit and drops to 3rd and drives normally, if i put car in 2nd ( which would be drive not overdrive as i have the standard jag shifter tower still) everything behaves normally, ie. Everything shifts normally, 1-2. 2-3 and i get lockup as well, so car is currently at trans shop so they can investigate.

Still cant open a file with scan9495, it seems though, as i can open it with excel that its not a huge ordeal.

Todays drive to transmission shop was by far furthest i have driven the car, about 15 miles in stop and go traffic, so about 40 minutes of driving, once car was up to temp after about 15 mins, i am getting a stumble as I pull away from a stop, also noticed after stopping for gas, it cranks for a good 3-4 seconds before catching when hot, so when i get car back, i will perform another scan, and hopefully now something definitive will show up, there are only a few of the original sensors left on this as i replaced most during the rebuild. I know the tps is original, as is the coolant temp sensor, and the maf.

[Injuneer]

Just curious.... did you follow up with the suggestion I made in the email I sent on 6/20:


When you made the video, appears the engine was not running – run time = “0”, MAP = 102+ kPa, MPH = “0”. What I am thinking is that unless the engine is running, the PCM is still setting the closed throttle 0% baseline. The upper limit for a closed throttle voltage baseline is about 0.90-1.00 volts. I’m just guessing at this point. I posed this to Gary, so maybe he can test it on his simulator.

Try opening the throttle slowly, WHILE THE ENGINE IS RUNNING to see if you get the same results.

[Darrenmb]

I did, same results, although i did it a little quicker than without it running, as my hoa wouldnt appreciate it. Took about 3 seconds to ramp up to full throttle and then instantly off, same thing, voltage changes without percentage of tps, i also hooked an old analogue voltmeter to it and got a steady sweep. Doesnt mean that isnt the problem though...

[Darrenmb]

Think i may need a new transmission shop... they are telling me things that are obviously lies, first was they changed the governor, and 2nd was that its a throttle cable issue, i do t have a 700r4, its a 4l60e... i already called them out on it and the guy on the phone said he would talk to his builder to see whats going on.. they have had car now for 2.5 weeks. My guess it they are trying not to pull trans back out!. My queation here is. If i can watch it command 1,2,3 and 4 and it goes to neutral in 4th could it be a harness issue? My understanding is is that if i get 1,2 and 3 it means all the solenoids are working correctly. Just want my ducks in a row before i raise hell when they call me back. Also just so all info is out there, i also still get lockup in 3rd.

Thanks
Darren

P.s. if i need to re-ask in transmission section let me know.