1995 Mitsubishi Mirage 4g93 ECU

- Basic demonstration of an EPROM Mitsubishi ECU -

4G93 SOHC EPROM ECU

Mitsubishi Part: MD302726

ECU Code: E2T300902

EPROM Chip: EB13A

Socketed by Patrick (Dude in a Mirage)

 

(Click on Images to view a the larger 1024x768 version of each)

Unsocketed/untouched EPROM chip - and a socketed ECU board

(the chips are soldered to the board by Mitsubishi)

OEM unsocketed EB13 ECU boardSocketed EB13 ECU board

ZIF Socketed ECU board (easier for chip changes)

ZIF Socketed EB13a EPROM ECU MD302726 - E2T300902 ECU with a ZIF socket

Leaking Capacitor Damage

Relatively common and you should check for it before the board is ruined

Leaking Capacitor on a Mitsubishi ECU Board

Screen Prints are from Tuner Pro

Stock EB13 Fuel Table #1

Stock EB13 Fuel Table #2

Stock EB13 Ignition Timing Table #1

Stock EB13 Ignition Timing Table #3 (there are five)

There are usually a few fuel maps and more timing maps in the ECU code. The two fuel maps on US cars are for Federal or California emmisions. There are resistors on the board that designate whch the ECU will use, thus making it a Federal or California emmisions ECU.

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Stock chip is a 27C256-12 (UV erasable) 256k chip
Standard replacement is 27C512 (PLCC 32) 512k chip
Electronically erasable is SST27SF512 (PLCC 32) 512k chip

They are 28-pin chips

If you are using a 512k chip, the code has to be on the last 256k of the chip. The easiest way to do this is to get the code ready, then copy the entire 256k of code, and paste it onto the end. It will always fill exactly 256k and your code is just on the chip twice.

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You can order chips from here:

www.moates.net

You are looking for C2 SST 27SF512 Chips

I am currently using the Burn1 chip burner and am very happy with it

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