issues getting power / starting etc

1. Mathias Saxperience Post Whore Joined: Mar 2008 Pembrokeshire Posts: 5598

   #1 10th December 2011, 21:18

   have refitted my engine loom, and made new battery cables with a rally design battery in rear, i have used
   
   thick cable battery to starter - on the thicker 13mm fixing
   smaller diameter cable from starter to alternator - again on 13mm fixing
   fuse box to starter - agin with smaller cable on the 13mm fixing
   battery to earth
   gearbox to chassis earth
   
   Still having isues! anyone any ideas after this lot?
   
   have now added an earth from the gearbox to the chassis, and tested the battery which is apparently fine?!
   
   few queries that i may have got wrong?!
   
   there are two threaded fitting on the starter motor..... a large with a 13mm nut and a smaller thread with an 8mm nut.
   
   i have put the lines from battery to starter, starter to alternator, and starter to fuse box all on the larger thread with the 13mm nut. IS THIS CORRECT?
   
   then the only fitting on the 8mm nut is the original connector from the loom......
   
   there are a few plugs which i also havent got plugged in, brown plug next to the inertia switch? And this 2 pin plug close to the inertia also see here.....
   
   
   
2. J222JRA Saxperience Hardcore! Joined: May 2007 Posts: 16839 Saxo VTS, Westfield

   #2 10th December 2011, 22:32

   I presume you have linked both engine fuse boxes to power??
   
   I worked mine different.
   
   I bought a 3 way power distribution block
   http://www.demon-tweeks.co.uk/motors...jointing-boxes
   
   
   1 lead from the battery to a pin on the distribution block.
   
   1 lead from the distribution block to the large terminal on the starter motor.
   
   1 lead from the distribution block to the large engine bay fuse box.
   
   1 lead from the distribution block to the small engine bay fuse box.
3. Mathias Saxperience Post Whore Joined: Mar 2008 Pembrokeshire Posts: 5598

   #3 10th December 2011, 22:40

   it now cranks but will not fire, so cables are now routed ok. the fuel pump will not prime, have checked the 15amp fuse which is fine, i pressed the fuel inertia switch earlier which has stayed pressed down and not sprung back up yet?
   
   when i press it to try and reset it, it wont return to its original place.
   
   the only other option is the pump relay under the ecu as the one now fitted is a spare one i had in the garage, so i dont know its good....
4. J222JRA Saxperience Hardcore! Joined: May 2007 Posts: 16839 Saxo VTS, Westfield

   #4 10th December 2011, 22:49

   Silly question but i presume the immobiliser light goes off on the dash when cranking the engine over?
5. Mathias Saxperience Post Whore Joined: Mar 2008 Pembrokeshire Posts: 5598

   #5 10th December 2011, 23:34

   when i turn the ignition to the first position the battery light shows, the clock comes on with no other lights
   
   also the headlights flash on and off several times and then stop, but the pump does not prime, the engine crank but does not fire?
6. user_34645 Saxperience Forum Bum Joined: Jun 2009 Rack City, Isle of Man Posts: 4127 GS300, MK1 VTS, Katy M 1190

   #6 10th December 2011, 23:41

   Sounds to me like what I had, either and ECU problem or the Crankshaft position sensor.. But that doesn't explain why the Pump doesn't prime.
   
   Tried disconnecting the battery and leaving it for a while, to let everything discharge and reset? Would have thought that'd allow the inertia switch to sort out its tiff.
7. Mathias Saxperience Post Whore Joined: Mar 2008 Pembrokeshire Posts: 5598

   #7 10th December 2011, 23:44

   cant be ecu as its a standalone kms which worked before i took the loom off?
   
   also its the same crank sensor so again cant be faulty, could disconnect the battery overnight and see what happens
8. Mathias Saxperience Post Whore Joined: Mar 2008 Pembrokeshire Posts: 5598

   #8 11th December 2011, 09:49

   Anyone else and ideas?
9. user_21226 Saxperience Post Whore Joined: Feb 2008 wirral Posts: 6348 Icelandic vtr turbo

   #9 11th December 2011, 10:37

   Last time I had this issue when i fitted the battery in thr boot on my iTB'd vts it turned out to be a dodgy earth, countered it by fitting 4awg wire from the battery to the chassis (had to sand the spot to the metal), gearbox to chassis, alt casing to chassis. Not sure if that'll help mate
10. Mathias Saxperience Post Whore Joined: Mar 2008 Pembrokeshire Posts: 5598

    #10 11th December 2011, 10:47

    Cheers mate I'll try re-doing the earths a little better. Did this stop your fuel pump from priming?
11. user_21226 Saxperience Post Whore Joined: Feb 2008 wirral Posts: 6348 Icelandic vtr turbo

    #11 11th December 2011, 14:03

    Yea it did not sure why tho lol, once it was sorted I just plugged the battery in and it worked fine
12. user_35090 Established Member Joined: Jun 2009 west mids (dudley) Posts: 1201 cammed 106 flatty

    #12 11th December 2011, 14:05

    When I relocated my battery to boot, I had a shit earth also, and pump didn't prime either. Just rubbed it down to bare metal and re fitted it. Started fine afterwards. May be your problem mathias. Hope nothing to major
13. Mathias Saxperience Post Whore Joined: Mar 2008 Pembrokeshire Posts: 5598

    #13 11th December 2011, 17:41

    UPDATE
    
    Right, have given the pump a live feed from the battery, turned ignition on and the pump primes, car starts and runs.
    
    however, take this live feed away turn the ignition and the pump wont prime....
    
    this means the battery cables ive made up are ok, the earths are all ok, fuses and relays are ok and the pump is ok!
    
    any ideas?
14. user_36198 Saxperience Post Whore Joined: Aug 2009 ilkeston derbyshire Posts: 9823 C2 VTR stripped, 406hdi, clio 172

    #14 11th December 2011, 20:55

    i had exactly the same problem with wassys car at one point after extending cables etc and i can't for the life of me say 100% we found a cure but definately recall the pump not priming and having to drop a seperate feed to it to prove a point
15. xsi16v Regular Poster Joined: Jan 2006 Ilkeston, Derbyshire Posts: 469 374 bhp Supercharged 205 GTI, Passat Estate

    #15 11th December 2011, 21:15

    surely you need the inertia switch fitted if your using a KMS?? your using the standard loom still.
16. Mathias Saxperience Post Whore Joined: Mar 2008 Pembrokeshire Posts: 5598

    #16 11th December 2011, 22:37

    After cleaning all earths and a few other bits the pump now primes and engine starts....
    
    However the pump continues to prime for done reason and does not stop after 5 seconds or so as it's supposed to?
    
    Yes the inertia will remain fitted
17. ryanmt Established Member Joined: Oct 2004 Warrington Posts: 1987 AX VTS 57 3.0 TDI A5

    #17 12th December 2011, 15:12

    Im not sure if the KMS stops the fuel pump from priming. From what i remember it doesnt