GalantVR4.org The Mitsubishi Galant VR-4 Forum
Galant VR-4 Forums » Galant VR-4 » Technical Discussions » Identifying an unknown EPROM chip
Previous thread Next thread

Identifying an unknown EPROM chip


RebuiltVR4
Newbie
520/2000


Galant VR-4 org Post #: 1245734 posted 04/03/19 09:34 AM     Remind Me!  Send Private Message   Edit Post      
Can anyone shed any information on this chip? I purchased this "good" socketed ecu with an unknown chip from John and Nate and just trying to see what i'm getting into.



That thing got a turbo?

Posts: 12 | From: Ft Benning, GA | Member Since: 03/02/19 | IP: (192.138.72.196) | Report this post to a Moderator

tektic
Senior Member


Galant VR-4 org Post #: 1245737 posted 04/03/19 12:56 PM     Remind Me!  Send Private Message   Edit Post      
It could be anything. You need to read it.

Posts: 1410 | From: ronkonkoma, ny | Member Since: 12/19/12 | IP: (2607:fb90:2429:6) | Report this post to a Moderator

RebuiltVR4
Newbie
520/2000


Galant VR-4 org Post #: 1245739 posted 04/03/19 01:14 PM     Remind Me!  Send Private Message   Edit Post      
i'm going to ask a really.. REALLY noob question, how do I read it? tactrix type cable? is there a harness/adapter that plugs into the factory harness for that?



That thing got a turbo?


Edited by RebuiltVR4 (04/03/19 01:15 PM)

Posts: 12 | From: Ft Benning, GA | Member Since: 03/02/19 | IP: (192.138.72.196) | Report this post to a Moderator

belize1334
well bread and nobly conceived
1334/2000


Galant VR-4 org Post #: 1245743 posted 04/04/19 07:56 AM     Remind Me!  Send Private Message   Edit Post      
^^ You would need to get an EEPROM chip reader/burner and software, unplug the chip from the ECU and insert it into the reader, and import it to your computer, and then read what's on it. And you would have to have some idea of what information is stored where on the chip because it's not at all obvious to the untrained eye. But, by the time you've got the equipment to read what's on the chip, you could just as well burn your own chip that matches your current setup. So, given that, you're probably best off trashing the chip that's in it and getting one that's specific to your car's setup. There are basically 3 ways you can go:

1) New chip from ECMTuning for $545. Comes with cables etc and gives you full customizability. Most expensive but with lots of features and fairly easy to use.
2) Buy a chip burner or emulator (moates ostrich, etc) and get tuning software (eg, TunerPro) and use these to make your own chips. Less expensive than ECMTuning but very complicated.
3) Buy a new one-off chip from FrozenApps (ebay seller, last person doing chips as far as I'm aware) for $70 preset to your configuration. Least expensive plug-n-play option but not tunable.



Roger B. Scott
'91 Belize Green


Edited by belize1334 (04/04/19 07:58 AM)

Posts: 3312 | From: Dundee, Scotland, UK | Member Since: 11/18/03 | IP: (134.36.232.110) | Report this post to a Moderator

tektic
Senior Member


Galant VR-4 org Post #: 1245747 posted 04/04/19 08:18 PM     Remind Me!  Send Private Message   Edit Post      
I can read and program chips

Posts: 1410 | From: ronkonkoma, ny | Member Since: 12/19/12 | IP: (100.2.39.114) | Report this post to a Moderator

iceman69510 Galant VR4.org Moderator
Turn Right Racing
855/2000


Galant VR-4 org Post #: 1245752 posted 04/05/19 06:54 AM     Remind Me!  Send Private Message   Edit Post      
I may have a spare Keydiver chip around. You might have to change your setup to match the specifics. I usually had a 3g maf/Evo injector setup called out, but that size injector is too small for many these days.

I would say ask Tektic to read yours first, then decide from there.



91 VR4 855 Nile Black
92 VR4 828 Belize Green-SOLD
91 VR4 115 Nile Black -SOLD

Posts: 10651 | From: Michigan | Member Since: 03/05/01 | IP: (205.144.100.200) | Report this post to a Moderator

tektic
Senior Member


Galant VR-4 org Post #: 1245754 posted 04/05/19 11:32 AM     Remind Me!  Send Private Message   Edit Post      
It comes down to this. Unless you have the same Injectors and maf as your chip was set up for, its useless to you. The chip in the picture with the little window on top is not even reflashable with modern equipment. I can read it but cant rewrite on that chip.

I can write a chip for your MAF based on factory data for that part and your injectors based on manufacture flow rate and what others have chosen for dead time. It will allow you to drive your car pretty normally and This is where most guys stop. This is when the tuning starts. Based on logs at idle, the actual dead time and fuel global of your injectors is chosen. With a fairly consistent a/f map loaded logs of Wide band readings are compared for deviation at all steps of MAF Hz. If you are going to use more than 15lbs of boost A new MAF scaler should now be chosen to extend the factory maps to allow for this. Only when your MAF is accurately set up for your specific plumbing do you insert an actual a/f map and tune for timing advance.

Posts: 1410 | From: ronkonkoma, ny | Member Since: 12/19/12 | IP: (74.71.69.137) | Report this post to a Moderator

iceman69510 Galant VR4.org Moderator
Turn Right Racing
855/2000


Galant VR-4 org Post #: 1245757 posted 04/05/19 01:42 PM     Remind Me!  Send Private Message   Edit Post      
So based on your comments above, do you then make adjustments and reflash the chip, or do you write a new chip?



91 VR4 855 Nile Black
92 VR4 828 Belize Green-SOLD
91 VR4 115 Nile Black -SOLD

Posts: 10651 | From: Michigan | Member Since: 03/05/01 | IP: (205.144.100.200) | Report this post to a Moderator

RebuiltVR4
Newbie
520/2000


Galant VR-4 org Post #: 1245758 posted 04/05/19 02:14 PM     Remind Me!  Send Private Message   Edit Post      
Quoting tektic:

It comes down to this. Unless you have the same Injectors and maf as your chip was set up for, its useless to you. The chip in the picture with the little window on top is not even reflashable with modern equipment. I can read it but cant rewrite on that chip.

I can write a chip for your MAF based on factory data for that part and your injectors based on manufacture flow rate and what others have chosen for dead time. It will allow you to drive your car pretty normally and This is where most guys stop. This is when the tuning starts. Based on logs at idle, the actual dead time and fuel global of your injectors is chosen. With a fairly consistent a/f map loaded logs of Wide band readings are compared for deviation at all steps of MAF Hz. If you are going to use more than 15lbs of boost A new MAF scaler should now be chosen to extend the factory maps to allow for this. Only when your MAF is accurately set up for your specific plumbing do you insert an actual a/f map and tune for timing advance.




Sir, sent you an email to your gmail.



That thing got a turbo?

Posts: 12 | From: Ft Benning, GA | Member Since: 03/02/19 | IP: (155.186.236.205) | Report this post to a Moderator

tektic
Senior Member


Galant VR-4 org Post #: 1245774 posted 04/08/19 09:28 PM     Remind Me!  Send Private Message   Edit Post   
Quoting iceman69510:

So based on your comments above, do you then make adjustments and reflash the chip, or do you write a new chip?




I really only program my own cars. I use an ostrich. I can reflash the chips I have though. The chips get beat up taking the on and off the board, even with the eorom pull tool. Otherwise you can write 100s of times to the same chip. I usually install zif sockets when I do a EPROM socket installation so I don't ruin them. But to answer your question, yes.

Posts: 1410 | From: ronkonkoma, ny | Member Since: 12/19/12 | IP: (24.189.25.4) | Report this post to a Moderator


Pages: 1
Previous thread Next thread

Extra information
0 registered and 21 anonymous users are browsing this forum.

Galant VR4.org Moderator:  curtis, steve, atc250r, jcgalntvr4-244, cheekychimp, jepherz, Rausch, toybreaker, iceman69510, pot, FlyingEagle 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled

Rating:
Thread views: 409

Rate this thread


News & Events: News | Events
Galant VR-4: Newbies | General VR4 Discussions | Technical Discussions | How To and Info Archive
Marketplace: Parts For Sale | Cars For Sale | Good Guys | Bad Guys
Community: Members' Showcase

Contact Us | Privacy statement GalantVR-4.org

Generated in 0.145 seconds in which 0.11 seconds were spent on a total of 14 queries. Turbo powered.


Hertz's Galant VR-4 Page