Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Please note that it is not permitted to have referral links posted in your signature. Keep these links contained in the appropriate forum. Thank you.

https://www.boards.ie/discussion/2055940817/signature-rules
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

vw caddy not starting

  • 15-01-2012 07:05PM
    #1
    rs8
    Registered Users, Registered Users 2 Posts: 446 ✭✭


    97 vw caddy not starting (1y engine) theres no fuel goin to the pump so i norrowed it down to either the big ecu relay or the tank unit!! got a relay off a friend today and no joy so would i be right in saying its the tank unit?? there diesel in it and before this it was taking about 3 atempts to start!!

    any advice welcome


Comments

  • #2
    101sean
    Registered Users, Registered Users 2 Posts: 2,884 ✭✭✭101sean


    Moved from 4x4, tractors, diggers and plant, more likely to get an answer here.


  • #3
    couldntthink
    Registered Users, Registered Users 2 Posts: 295 ✭✭couldntthink


    what is it that leads you to think it's the ecu relay or the "tank unit". More info required.


  • #4
    Slidey
    Closed Accounts Posts: 12,811 ✭✭✭✭Slidey


    It could be any number of things but going by the age of it I would say the only likely electrical fault that would cause a non-start would be a stop solenoid on the pump.

    Have you changed the fuel filter?

    Checked all the fuel lines for leaks/cracks back to the tank?

    I did see the tank unit blocked with shyte on a Golf, you could get at it under the passenger seat, not sure if there is an inspection plate on the floor in the Caddy.


  • #5
    swhyte027
    Closed Accounts Posts: 419 ✭✭swhyte027


    I would be more likely to say the fuel pump but the info u give isn't great but I'd be going with the fuel pump on it.as its mechanical pump


  • #6
    CJhaughey
    Registered Users, Registered Users 2 Posts: 14,678 ✭✭✭✭CJhaughey


    Try testing relay 109, these are a known problem on the Seat Inca/VW caddy, these cause starting problems. Its a dealer only part but not too expensive.


  • Advertisement
  • #7
    rs8
    Registered Users, Registered Users 2 Posts: 446 ✭✭rs8


    sorry lads havent been on i a while!

    yes fuel filter was change recently!

    i think it could possibly be the relay or the tank unit cause theres no diesel getting to the injector pump! the big relay controls the tank unit pump but as i say i got one handy off a friend and it didnt work! so this is why i think its the tank unit!


    slidey theres three solenoids on the pump! i tried sending power to all three (not at same time) to see if it would do anything, any tips about these?? ill check the pipes when i get a chance

    no such thing as a relay 109 in a 1y engine


  • #8
    Slidey
    Closed Accounts Posts: 12,811 ✭✭✭✭Slidey


    Just to confirm, this is a 97?

    I don't think there is any pump in the tank unit of a 97 caddy, the lift pump is built into the injector pump. Someone want to correct me on this?

    If you just hook up a clean gallon can of diesel to the injector pump and see will it fire.

    The stop solenoid is a 24mm jobbie with a single wire to the top of it. If is not taking a current it may well be faulty. You can remove the solenoid and take out the plunger and spring to get around the issue temporarily


  • #9
    rickyweaver22
    Closed Accounts Posts: 3 ✭rickyweaver22


    Have u replaced the fuel pump relay switch and glowplug relay switch? My van cuts out randomly and wont start randomly I fort it maybe the glowplugs wer worn but changed em for ngks still no joy but she fires up wen she wants to very tempromental, if u have found the problem take the time and write back on here m8 could do with some caddy help cheers mate!


Advertisement