Installing the V7.5 Software

I am having a problem after upgrading to 7.5 from 7.3 using a V1. Car was tuned on 7.3 and after upgrading I read the PCM data into 7.5 with a different computer and the car ran poorly afterwards. poor idle ect. I did the same thing with reading the PCM again with 7.3 and the car ran flawless. To make things interesting I did the same thing with my cousins car and his did the same exact thing. Ran poorly after the reading with 7.5 and ran fine after reading with 7.3. Neither car was written to so why would this make the car run differently? My cousins car was originally tuned using HP tuners where mine was tuned using 7.3

Thoughts?

Quote:

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Originally Posted by DWS6

I am having a problem after upgrading to 7.5 from 7.3 using a V1. Car was tuned on 7.3 and after upgrading I read the PCM data into 7.5 with a different computer and the car ran poorly afterwards. poor idle ect. I did the same thing with reading the PCM again with 7.3 and the car ran flawless. To make things interesting I did the same thing with my cousins car and his did the same exact thing. Ran poorly after the reading with 7.5 and ran fine after reading with 7.3. Neither car was written to so why would this make the car run differently? My cousins car was originally tuned using HP tuners where mine was tuned using 7.3

Thoughts?

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You only read the PCM...?

After reading, did you turn off ignition key and wait at least 20 seconds...?

Correct. Only read and yes both were rebooted

Both cars were effected by idle issues only from what we can tell

After reading a controller, the RAM is erased and some values are reset to zero and some are reloaded from defaults stored in flash memory, exactly as would happen if/when the battery was disconnected and reconnected. I.e. the PCM is "rebooted". That can cause all sorts of learned values to be lost and require relearning. To verify if that is the case, wait until the values are learned again, maybe after 2-3 days of driving. Then remove battery power from the PCM , wait 1-2 minutes and reconnect the battery. If you experience the same results then that should explain what is happening.

Regards
Paul

I have noticed that since the .ctz file change that when I re-flash either with a full or cal only flash that the engine runs rough on idle for quite a while, several stop and start and idle events, not what is use to do with the older software, I could flash either full or cal and it would on start up, stumble for 2 or 3 seconds and then went right back to idling as before flash. Is there something that has changed in the software and what it erases now? In both events the SRT was reset and had to relearn its part but it seems that the newer software erases something different.
Just a observation. Oh and have done the battery cable off believe it or not and it would learn idle in a short while, not like the rough idle event described above. It does finally relearn idle but it takes a lot longer than the older flashes use to. I only have 54,000 miles so not a high mileage occurrence with worn out parts.

Quote:

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Originally Posted by Chevy366

I have noticed that since the .ctz file change that when I re-flash either with a full or cal only flash that the engine runs rough on idle for quite a while, several stop and start and idle events, not what is use to do with the older software, I could flash either full or cal and it would on start up, stumble for 2 or 3 seconds and then went right back to idling as before flash. Is there something that has changed in the software and what it erases now? In both events the SRT was reset and had to relearn its part but it seems that the newer software erases something different.
Just a observation. Oh and have done the battery cable off believe it or not and it would learn idle in a short while, not like the rough idle event described above. It does finally relearn idle but it takes a lot longer than the older flashes use to. I only have 54,000 miles so not a high mileage occurrence with worn out parts.

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Nothing about the reflash process has changed in V7.5 for years.
The V8 reflash process has been updated from time to time but as for what gets erased and what gets re-written, nothing has changed (that I know about) in that regard since day 1.

Regards
Paul

Quote:

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Originally Posted by DWS6

I am having a problem after upgrading to 7.5 from 7.3 using a V1. Car was tuned on 7.3 and after upgrading I read the PCM data into 7.5 with a different computer and the car ran poorly afterwards. poor idle ect. I did the same thing with reading the PCM again with 7.3 and the car ran flawless. To make things interesting I did the same thing with my cousins car and his did the same exact thing. Ran poorly after the reading with 7.5 and ran fine after reading with 7.3. Neither car was written to so why would this make the car run differently? My cousins car was originally tuned using HP tuners where mine was tuned using 7.3

Thoughts?

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Do you still have the *.blx trace files from when you read the vehicles? If so can you zip them up and send them to me at [email protected] with a link to this thread so I know what they are about.
More info on finding the *.blx files here: http://support.efilive.com/kb_articl...8254-QOGC-9586 (towards the end of the page).

Regards
Paul

Quote:

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Originally Posted by Blacky

After reading a controller, the RAM is erased and some values are reset to zero and some are reloaded from defaults stored in flash memory, exactly as would happen if/when the battery was disconnected and reconnected. I.e. the PCM is "rebooted". That can cause all sorts of learned values to be lost and require relearning. To verify if that is the case, wait until the values are learned again, maybe after 2-3 days of driving. Then remove battery power from the PCM , wait 1-2 minutes and reconnect the battery. If you experience the same results then that should explain what is happening.

Regards
Paul

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Hi Paul. I'm fairly new to the world of efilive. Having only had my flashscan V2 for a bit over a month, I don't really know how the flashscan worked on older versions of the software but I do know that I'm experiencing the same problem as the others have outlined.

Basically, when I flash my PCM the trims go to sleep... and don't want to wake up. I've driven the car around for hours after a flash and then hooked up the flashscan, gone into the scanning software and had a look at Calibration>Long term fuel trim cells and found all zeros.

I did find a workaround to this problem. What I found was that if you leave the flashscan and laptop hooked up to the car after flashing the PCM, and then go for a short drive logging the LTFTs in the scanning software, it forces the trims to wake up. A 2-3 minute drive is all it takes... the trims are then all working and the engine is noticeably happier.

EDIT: I should also mention that when I do this workaround, I turn the key to ignition, connect the scanning software, start the logging session and then start the car. I don't know if it makes any difference whether you start the car before or after you start logging... but it might, so I thought I'd post this additional information for anyone who has the same problem and wants to try this workaround.

Hi Everyone,

I am new to the Forum and EFI Live and I am having trouble getting V7.5 to open on my computer. I am running Windows 8 through Parallels on a Mac, and keep getting the below error after installing.

Cannot open file "C:\Windows\system32\config\systemprofile\Docu ment s\EFILive\V7.5\User Configuration\calc_pids.txt". The system cannot find the file specified

I have tried to uninstall and install several times but keep getting the same message. V8 installed and is working fine, but I cant open neither V7.5 program (tune nor scan). Any help is greatly appreciated.

Thanks,