Saxo ECU conversion

1. Bcup L-plater Joined: Aug 2009 Lisbon-Portugal Posts: 34 Citroen Saxo 1.6 16V

   #1 16th February 2012, 13:57

   Hello everybody.
   
   Like the title says I've been doing a conversion on a VTS saxo from a MK2 3 plug ECU to a MK1 single plug ECU.
   
   First i have change the loom on the engine to the mk1 loom and make the conversion on the multiplug.
   The wires were all well connected and the car didn't start.
   The ECU wasn't giving signal for the injectors to open and for the coil.
   
   Now I have changed the car entire loom to the MK1 loom and put the MK1multiplug again and the car is the same.
   Won't start and is not giving any signal for the injectors to open and for the coil.
   
   The ECU is unlocked so no need for the imobiliser.
   
   I have try the ECU, the engine relay and the cranksahft sensor in another saxo and starts fine.
   
   Any ideia what might be wrong???
2. Bcup L-plater Joined: Aug 2009 Lisbon-Portugal Posts: 34 Citroen Saxo 1.6 16V

   #2 16th February 2012, 18:51

   Any ideia please...
3. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

   #3 16th February 2012, 18:58

   Can you hear the fuel pump relay humming?
4. Bcup L-plater Joined: Aug 2009 Lisbon-Portugal Posts: 34 Citroen Saxo 1.6 16V

   #4 16th February 2012, 19:02

   Thanks for the answer.
   
   Yes.
   And the fuel pump is working too.
5. user_51379 Saxperience Forum Bum Joined: Mar 2011 plymouth Posts: 2921 mk2 VTS

   #5 16th February 2012, 19:05

   is the black immobiliser box disconnected and have you checked the earth points around gearbox and chassis
6. Cam Saxperience Post Whore Joined: Nov 2010 Kent Posts: 8439 Gen 7 Celica 190.

   #6 16th February 2012, 19:11

   Is there a key sign on the dash when you try to start it?
7. Bcup L-plater Joined: Aug 2009 Lisbon-Portugal Posts: 34 Citroen Saxo 1.6 16V

   #7 16th February 2012, 19:11

   The ECU is unlocked so the imobilizer box is disconneted and the earth points are all fine and connected.
8. Bcup L-plater Joined: Aug 2009 Lisbon-Portugal Posts: 34 Citroen Saxo 1.6 16V

   #8 16th February 2012, 19:14

   No key sign...
9. user_51379 Saxperience Forum Bum Joined: Mar 2011 plymouth Posts: 2921 mk2 VTS

   #9 16th February 2012, 19:21

   try dissconecting and re-connecting the injector and coilpack plugs and didnt single plug and 3 plug use different injector loom and coilpack
10. Bcup L-plater Joined: Aug 2009 Lisbon-Portugal Posts: 34 Citroen Saxo 1.6 16V

    #10 16th February 2012, 19:25

    Yes they did.
    I'm using the MK1 injector loom and the MK1 coilpack plug.
11. user_51379 Saxperience Forum Bum Joined: Mar 2011 plymouth Posts: 2921 mk2 VTS

    #11 16th February 2012, 19:27

    hmm im stumped then mate
12. user_43898 Established Member Joined: May 2010 leicester Posts: 1446 Clio 182 Inferno

    #12 16th February 2012, 19:33

    Have you got a good supply of fuel to the rail? and you have not spark or injection signal, How are you checking for you injection signal? are you using noid testers?
13. Cam Saxperience Post Whore Joined: Nov 2010 Kent Posts: 8439 Gen 7 Celica 190.

    #13 16th February 2012, 19:35

    Is the fuel reley ok?
14. Bcup L-plater Joined: Aug 2009 Lisbon-Portugal Posts: 34 Citroen Saxo 1.6 16V

    #14 16th February 2012, 19:54

    Yes a got good suplly on the fuel rail.
    I'm testing with the voltemeter.
15. citroen_saxo_vtr Saxperience Forum Bum Joined: Mar 2006 Norwich Posts: 2823 Vectra sri 2.6 v6

    #15 16th February 2012, 23:06

    what engine was in the saxo previous before the 16v lump? id say fuel pressure ither pump weak or needs a return plumbed in.