Flashing Preheat Lights

[big_kev]

The old Gal has a problem.

Driving along happily noticed the Diesel preheater light flasing !

No idea what that meant ? Ignored it, as you do !

 

Arrived at destination no noticeable difference in driving performance.

 

Next day it wouldn't start, turned over fine just wouldn't start.

Gave up eventually and called green flag, after the usual b*ggering about he deduced that it no fuel, and that the fuel cut-off relay had no power to it.

He assumed that it was a blown fuse or dodgy relay( aren't these just conveniently placed to get at ).

A temporary fix was put in place, lead direct to battery with in line fuse to remove overnight so it didn't go flat).

Car now starts fine, however it is as flat as a pancake, no power going up hills and lack of accelleration, even for a diesel ( before anyone comments ).

 

As a footnote I did notice before this problem started that the bulb wearnings light were having a party, sometimes they would all not go off whilst driving sometimes just the odd one or two, this still happens, don't know if it is related or not.

 

Anyhow enough rambling, who can tell me which relay feeds they fuel cut-off valve in the engine bay sort off middle left ish.

 

Thanks

 

Kev

[Guest vr6galaxy]

Check the brake lights work ok?

[big_kev]

Yup the brake lights are fine as are all the others, checked these when the bulb warning lights started acting up.

[Masked Marauder]

Have you actually removed the stop/tail bulbs and checked the filiments are not broken and shorting out? I know it sounds daft, but go with me on it.......

[big_kev]

I will try chnaging the brake light out tomorrow ( when it is not so cold and wet ).

 

Still cant see how this will affect the feed to the fuel cut-off valve, but I will try it anyway and let you know.

 

Thanks

 

Kev

[GSMGuy]

It may not be that part of the switch - remember there are actually 2 switches in the unit - 1 controls the lights and the other signals to the ecu that you are on the brakes...

 

 

Mike

[big_kev]

I tried swapping out the brake light bulbs.

No difference still the same.

 

We are losing track here, I think the bulb failure lights are coincidental.

 

The main issue is still the lack of voltage to the fuel cut off valve thingy.

 

Any idea which relay or fuse feeds this ?

[Steven.Langdale]

I'll try and help here - but i'm not the best at reading the TIS wiring diagrams.... :lol:

 

Which engine do you have? TIS has got details on 2 for the 1998-2000.5 range...

 

For the 1.9 TDI Unit Injector Engine (would that be the PD????), the relay that feeds the stop solenoid is F32 (10A) in the Central Junction Box.

 

For the stadard 1.9 TDi, it looks like the solenoid feeds straight out of the PCM.

 

Someone please jump in if this is complete crap!!

 

Have you tried disconnecting it and applying 12v to see if the engine fires?

 

Steven

[big_kev]

Hi Steve,

 

If I provide 12v direct from the battery the engine fires up fine, this is how I have been running it for the last few weeks.

I have checked the fuse F32 it seems fine ( swapped it with another ).

 

The money seems to be on the PCM, any idea if I can just swap one from another similar model or do Frauds have to get involved?

 

Also does anyone know if they can be seen using VagCom or similar equipment.