TDI won't start

adamhughes

02 caddy van when i went out this evening wouldn't start, plenty diesel, all relays ok, no damp on ecu but diagnostic socket not working

nelly17

Glow plugs or injectors maby?

adamhughes

nelly17 wrote: »

Glow plugs or injectors maby?

hi, i sprayed some easy start into it and no go, if glow plugs at fault it would have started id say

martyc5674

Should have started with that... did it run any little bit on the easy start?
All you need for it to fire up on that is a bit of compression and the timing correct.

adamhughes

martyc5674 wrote: »

Should have started with that... did it run any little bit on the easy start?
All you need for it to fire up on that is a bit of compression and the timing correct.

run for few seconds yes

Juan More Time

Sounds suspiciously like a plugged up fuel filter to me.. Or fuel lines or sender in fuel tank gummed up with debris...

martyc5674

adamhughes wrote: »

run for few seconds yes

Fuel starvation then...
Could be a myriad of things... blockage etc as mentioned, MAP sensor, best hook it up to a diagnostic to see what’s going on. See if fuel rail getting up to reqd pressure,are injectors being called etc.

adamhughes

diagnostic socket not communicating

martyc5674

Check fuses... disconnect battery for a few hours to reset ECU, hopefully that will sort your communications.
Marty.

Juan More Time

https://youtu.be/yRMTEAKsScE



Or if your caddy is 1996 - 2004, it could very well be the infamous 109 main relay... The ones where the solder joints become brittle with age are usually black in colour... The revised versions are Grey in colour.


https://youtu.be/ibgVDxyVPYk

adamhughes

tried all but no start

Juan More Time

if the starter motor isn't spinning up, check the wire going into the starter motor solenoid. You may need to remove the battery to do this properly...

nd

Can you get into the other modules with your diagnostics like say immobilizer, multifunction ect? If so I'd suspect the ecu isn't getting power for some reason.

Juan More Time

Try this

https://youtu.be/JBXegdBXvsM

enumbers

if all power relays are working and been received by ecu but with no start and no comms sounds very much like ecu issue if you can check the power supplies to ecu to make sure there is no wiring issue