LH and EZK EPROM numbers by model and year

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05-17-2020 | 02:50 PM

#16

993turbo

Burning Brakes

Joined: Jun 2004

Posts: 859

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From: Puerto Banus - Marbella, Spain

I have the chips out of a 90’ ROW GT I can check tomorrow.

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05-17-2020 | 03:05 PM

#17

John Speake

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Joined: Feb 2002

Posts: 7,056

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From: Cambridge England

Quote:

Originally Posted by Crumpler

Can anybody confirm this:

I’m 90% certain the chips ending in 428 are from the EZF side and the 721 is from the LH side.

Could not find confirmation in other posts.
They are from a 86.5 manual.
Thank you.

From my collection of chips, all the EZ-F EPROMs end in 4-- US LH usually end in 5--; 590 is common for the US 32v I have one chip from a US 32v that ends in 721 like yours. From an LH 928 618 213 04

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05-17-2020 | 03:50 PM

#18

PorKen

Inventor
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Joined: Sep 2002

Posts: 10,177

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Quote:

Originally Posted by Crumpler

I’m 90% certain the chips ending in 428 are from the EZF side and the 721 is from the LH side.

Correct. The red letters look like they may have meant to say "LH".

x721 is from a 86.5 32V LH with yellow motherboard (vs. earlier green - S3 chips/boards are interchangeable).

S3 32V

EZ x422
EZ x428

LH x590
LH x631
LH x721

S2 16V

EZ x403
EZ x418

LH x527

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