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 Post subject: ECU question
PostPosted: Thu Apr 12, 2007 6:56 am 
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Joined: Mon Jan 01, 2007 12:15 pm
Posts: 212
Location: Cornwall, UK
I've got my eye on this ECU and chip for my car, but it's out of a mk2 GTi, I have a mk3. Will it swap over easily, or is it going to be more hassle than it's worth?

Thanks,
Jon

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 Post subject:
PostPosted: Thu Apr 12, 2007 7:01 am 
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Joined: Fri Aug 04, 2006 4:52 am
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Location: Kent
It will swap in just fine, however the check engine light may remain on but it won't affect the car in any way


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 Post subject:
PostPosted: Tue Apr 17, 2007 2:56 pm 
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Joined: Wed May 17, 2006 1:53 am
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Location: london
when they say there is a difference beetween the mk2 and mk3 ecu do they mean mk2 ph1 and mk2 ph2 i get them muddeled up


steve :D

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 Post subject:
PostPosted: Tue Apr 17, 2007 4:31 pm 
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Joined: Mon Jun 28, 2004 9:27 pm
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Location: Christchurch, New Zealand
Mk2 = Mk2 Ph1
Mk3 = Mk2 Ph2


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 Post subject:
PostPosted: Wed Apr 18, 2007 4:57 pm 
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Joined: Tue Oct 03, 2006 4:26 pm
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Location: Toronto, Ontario
Might be that the MK3 have more ignition componenets. Also depends on the year of MK3 as I beleive 91+ is OBD-1 standard, whereas prior is not.

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 Post subject:
PostPosted: Sat Apr 21, 2007 9:51 am 
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Location: Vancouver, BC
The MK3 stored it's fuel and timing info in a different region of EPROM memory than the MK2. The chip and ECU need to be a matched set (unless the chip was deliberately burned to be "universal"). ECU are interchangable either way between MK2 and MK3 vehicles.

In North America, all GTis were OBD I. MK3s did have an ALDL connector. I'm betting the pending requirements for OBD II may have been one of the reasons the GTi was discontinued after '94 (many OBD II vehicles started being introduced in the '95 model year).

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 Post subject:
PostPosted: Wed Apr 25, 2007 3:08 am 
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Joined: Sat Jul 23, 2005 4:00 pm
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Location: Shrewsbury
I have a Mk2 Chipped ECU with a Toms Rally Chip in, mine is a MK3 and only trouble i had was changing em over there a pain, the engine light does remain on constantly


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