chip solder in ?

ekdave1962 · Post by **ekdave1962** » Wed Sep 22, 2010 9:07 am

hi i picked up what is ment to be a vn ecu and notice that the chip is marked differntly to my other one .. and to my suprise when i tried to remove it it was soldered in .. is this common ?

Post by **delcowizzid** » Wed Sep 22, 2010 9:13 am

yeah they are all soldered in

Post by **antus** » Wed Sep 22, 2010 10:13 am

Yep, and the sticker that reads ATFY is normally located there and you can look up what that is on Dr Bobs site here: http://memcals.com/rcc_info_memcals.html

"ATFY4410 $5D 89, 3.8L V6 Auto & Man 1227808 Production Run Change for 1990 Eng"

ekdave1962 · Post by **ekdave1962** » Mon Sep 27, 2010 11:37 am

ok handy site thanks ATFY4410 $5D 89, 3.8L V6 Auto & Man 1227808 Production Run Change for 1990 Eng so series 1 vn v6

Circlotron · Post by **Circlotron** » Mon Apr 25, 2011 6:31 am

How about this memcal? It is from VP 5L.
Does not look like original eprom so maybe someone has changed it. It is on LPG.

Anyway, what is the best way to get the eprom unsoldered? I'm quite handy with a soldering iron but I'm scared that if this is a custom eprom then something might happen if I pull it out the wrong way and I'll be stuffed. I've only had the car 6 weeks - spent 26 years driving Kingswoods so this is my first car with an ECU

Post by **antus** » Mon Apr 25, 2011 7:20 am

What are you trying to do? If you just want to read it then you can make up an adaptor easily enough and leave it in the memcal, which from your other post I guess thats what your doing.

Post by **The1** » Mon Apr 25, 2011 7:48 am

If you dont get an adaptor made, ill have adaptors for sale once i get the rest of the parts in this week im hoping

Circlotron · Post by **Circlotron** » Mon Apr 25, 2011 1:26 pm

Yeah, I just want to read it at this stage. I reckon I'll get one of your adapters once they are ready. Send me a personal message.

What's the go with some memcals having a little ceramic pcb with surface mount parts on them? Is that knock sensor circuitry?
What are the two dip package parts on my memcal? Are they just resistor packs for limp home operation or something more complex?

Post by **Holden202T** » Mon Apr 25, 2011 1:48 pm

yeah the memcal in your first picture has the V6 knock filter board over the top of the dips.....

the dips are resistor packs for limp home mode, gives the ecm default values that the engine will run with well enough to drive it home if the memcal eprom fails!

they also tell the ecm if its 4 / 6 / 8 cylinder etc

Circlotron · Post by **Circlotron** » Tue Apr 26, 2011 4:27 am

That's not too hard then.
Say I get myself another memcal assembly but for a different engine and I want to convert it to my engine (VP 5L) is there info somewhere regarding the details of these resistor packs so I could just rig together something rather than have to hunt down suitable resistor packs or, worse still, pay through the nose for a 5 litre memcal?

I can well imagine wreckers almost giving away ECUs for undesirable cars but charging an arm and a leg if you want one for a V8 Commodore despite being so similar.

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5L resistor packs