Engine swap - ECU & Immobliser

1. smokeandpoke Regular Poster Joined: Aug 2014 Surrey Posts: 275 '57 Vauxhall Vectra CDTI - Daily '02 Saxo VTS - Tu

   #1 24th April 2017, 15:06

   Hi all
   
   
   Facing the end of the life of my engine,
   
   I just wanted to know, if I swap JUST the engine, literally remove and refit the new one, can I use the same ECU etc without upsetting the immobiliser or do I need everything from the car the engine came from?
   
   If not, will a jp4 accept the j4 ECU?
   
   
   
   Thanks in advance
2. welshpug Saxperience Forum Bum Joined: Jul 2010 South Wales Posts: 3078 ZX 16v, 205 GTI, 309 Goodwood, 405 MI16.

   #2 24th April 2017, 16:11

   just swap the engine, they're not coded to the ecu.
3. smokeandpoke Regular Poster Joined: Aug 2014 Surrey Posts: 275 '57 Vauxhall Vectra CDTI - Daily '02 Saxo VTS - Tu

   #3 24th April 2017, 18:50

   Quote:

   Originally Posted by welshpug just swap the engine, they're not coded to the ecu.

   Was more immobilizer I'm worried about, as the car can't be started.
   Will both the ECU and immobilizer accept a new engine?
   
   Thanks Welsh
   
   
   Sent from my EVA-L09 using Tapatalk
4. Mickswan Saxperience Forum Bum Joined: Apr 2013 Jarrow Posts: 4022 2003 Icelandic Grey 16v VTR 1991 Daihatsu GTti

   #4 24th April 2017, 20:45

   It will

   1 user thanked this post: smokeandpoke
5. smokeandpoke Regular Poster Joined: Aug 2014 Surrey Posts: 275 '57 Vauxhall Vectra CDTI - Daily '02 Saxo VTS - Tu

   #5 24th April 2017, 20:52

   Quote:

   Originally Posted by Mickswan It will

   Cool.
   J4 ECU/JP4 Engine compatibility?
   Sensors can be made to fit but what about the actual ECU - j4s are hard to find now!
   
   
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6. Chipwizards Frequent Poster Joined: Nov 2009 Posts: 576

   #6 25th April 2017, 22:46

   If you drill the JP4 head to accept the J4 inlet you've got nothing to worry about.
   Except maybe if your J4 is very early you might need to swap the coolant temp sensors to the JP4 head because the connector type changed mid-J4.

   1 user thanked this post: smokeandpoke
7. smokeandpoke Regular Poster Joined: Aug 2014 Surrey Posts: 275 '57 Vauxhall Vectra CDTI - Daily '02 Saxo VTS - Tu

   #7 25th April 2017, 23:30

   Quote:

   Originally Posted by Chipwizards If you drill the JP4 head to accept the J4 inlet you've got nothing to worry about. Except maybe if your J4 is very early you might need to swap the coolant temp sensors to the JP4 head because the connector type changed mid-J4.

   That's the plan. It's an 02 so should be okay!
   
   Any idea of what sensors need changing or is it altogether very different?
   
   Thanks bud
   
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8. Chipwizards Frequent Poster Joined: Nov 2009 Posts: 576

   #8 28th April 2017, 20:20

   Quote:

   Originally Posted by smokeandpoke That's the plan. It's an 02 so should be okay! Any idea of what sensors need changing or is it altogether very different? Thanks bud Sent from my EVA-L09 using Tapatalk

   Coolant temp, as already stated.
9. smokeandpoke Regular Poster Joined: Aug 2014 Surrey Posts: 275 '57 Vauxhall Vectra CDTI - Daily '02 Saxo VTS - Tu

   #9 29th April 2017, 11:13

   Quote:

   Originally Posted by Chipwizards Coolant temp, as already stated.

   You said the earlier ones need changing.. mines an 02 so should be okay?
   I will take as much of the wiring and ancillaries as possible!!
   
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