ECUflash 99 ecu in a 97 question

[jahjahSQC]

I had a friend give me a 99 gst ecu and told me it was a bolt in upgrade to my 97 gst ecu.

I know they can be programmed, i've seen the thread in the tuning subforum, but is there any benefit to just a swap with a stock 99 gst ecu?

thanks

 

[Maverick4g63]

Is his ecu an eprom unit or had the caps replaced? Im new to this and want to learn as much as possible. I wouldnt think there would be any advantage besides having a back up ecu.

Sent from my SCH-I500 using Tapatalk

 

[kthackst]

There is no direct benefit to just plugging in a 99 ecu in an earlier model. In fact you will throw a CEL for not having the second Evap sensor the 98/99 dsms have.

The advantage is you can flash it and unlock cool things like antilag timing and fuel table edits and injector scaling. But you have to flash it to get the advantages.

 

[snowborder714]

Only '95 ECU's were EPROM. The '98/'99 ECU's are in the black plastic cases and are reflashable (search for a thread by ceddy for more info).

There is no benefit for bolting in the ECU as is.


If you're looking for a tuning solution, you can send your '97 ECU into ECMTuning and have them convert it to EPROM so you can run ECMlink.

 

[LiquidX]

That, or use the 99 ECU and get a Tactrix cable and do your own tune flashing with Evoscan.

 

[jahjahSQC]

awesome info guys. thanks again.

 

[kthackst]

That, or use the 99 ECU and get a Tactrix cable and do your own tune flashing with Evoscan.

Well you flash with EcuFlash and log with Evoscan. But yeah the OpenPort 2.0 cable from Tactrix is required to use either program.

 

[LiquidX]

Good catch, thank you for the correction.

 

[kthackst]

No problem. This dsm ECU flashing has alot of questions and it is the one area where I am proficient at so I like to make sure all the info i see on here is correct and accurate.

Trying to keep the site clean so people have one more reason to search.

 

[sax_man]

In fact you will throw a CEL for not having the second Evap sensor the 98/99 dsms have.

This is not true. I'm currently running a 99 ecu in my 97 with 0 problems.

 

[kthackst]

This is not true. I'm currently running a 99 ecu in my 97 with 0 problems.

I have no idea how you are doing that. it is a fact there is a second evap sensor on the 98-99 eclipse. the 99 ecu should throw a code without the second sensor attached.

Was the ecu tuned before you put it in? Or did you turn off the solenoids in the periphery bits?

I have done 4 cars now. all 97 or earlier and every single one throws a evap code when you stick a 98/99 ecu in it.

Something is different about your setup.

 

[sax_man]

As far as I know it has never been flashed and is still on the stock map.

And I haven't messed with it because I'm not sure what I need to do to be able to flash. I know I need the 2.0 cable, but for 97's don't you need to wire in another pin to the ecu?

 

[rail king]

read

http://www.dsmtuners.com/forums/tun...first-flashed-dsm-ecu-98-99-flashing-faq.html


on the 95-97s, you need to find pin 79 for tuning purposes

 

[etay89]

This is not true. I'm currently running a 99 ecu in my 97 with 0 problems.

When it comes to EvoScan/Ecuflash, I know little to nothing but I'm also a 2nd case with this as well.

I had a 97 GST, then i got a 98 blackbox ECU, swapped it, and no CEL.