car wont start, no fuel getting to fuel rail SORTED NOW

g40chris · May 17, 2009, 05:44:02 PM

it turns over fine but just wont fire

has been running this week fine, i have checked and there is a spark to all leads and plugs
i pulled the pipe off the end of the fuel rail and tried firing it and no fuel came through

Alexiskayak_7 · May 17, 2009, 05:51:08 PM

First of all, check the fuel pump relays (poor contact or even broken)
If there is no pump relay problem you have to replace the fuel pump

g40chris · May 17, 2009, 05:53:20 PM

where are the fuel pump relays and what do they look like

g40chris · May 17, 2009, 06:14:49 PM

is it the 2 little boxes near the ecu

Alexiskayak_7 · May 17, 2009, 06:24:14 PM

Yes mate, these 2 little boxes that are next to the ecu, also check the single one that's over the fuse box...

g40chris · May 17, 2009, 06:39:14 PM

checks the 2 boxes, how can i tell if these are working or not

they were both connected fine, one had a little bit of green on it but i cleaned all the terminals and refitted but no joy.

i will go to check the other little box now

g40chris · May 17, 2009, 07:15:38 PM

cleaned all the terminals of the box above the fusebox and still wont start

there was a white connector coming from a red cable with a fuse which had blown with 5amp fuse with radio/charger writtn on it

any ideas what i should do next

hayesey · May 17, 2009, 07:31:14 PM

check the wiring between the yellow blade fuse on top of the fusebox and the red/yellow wire to the fuel pumps. There's a diagnosis thread in one of the FAQ sections with more details in it, have a read of that.

g40chris · May 17, 2009, 07:52:13 PM

looked at the FAQ's and i realised that i adjusted the idle screw but didnt do this as described in the FAQ's. could this be a problem

hayesey · May 17, 2009, 08:45:40 PM

that's not going to affect the fuel pumps running. It's going to either be a dead pump, engine bay to pump wiring, that fuse, fuel pump relay, ecu issue....

g40chris · May 17, 2009, 09:16:26 PM

im finding it weird as it was running beautifully yesterday, decided to take the battery off to charge it and now it wont start with the battery charged.

if there was a problem with the pump or fuel system in some way surely it would have cut out yesterday. gutted i wanted to get it sorted tonight so i can move the car so i can take my bins out and they are full. oh well

g40chris · May 17, 2009, 09:34:34 PM

the yellow fuse is fine
aint got a multimeter to check the wiring

cant really hear the pump priming at all

if its got a spark then the distributor should be ok i assume

i hate problems like this, but when they are sorted you have piece of mind that that part is new

Robin · May 17, 2009, 10:15:06 PM

go to VW and buy a new relay and try it to see if it solves the problem, if not then it may be your fuel pump but they uaually die slowly rather than all of a sudden.

g40chris · May 17, 2009, 11:17:31 PM

so i need to ask for a new fuel pump relay

are they expensive and are they g40 specific. my local vw aint much kop

g40chris · May 18, 2009, 07:12:48 PM

fuel pumps are cheap enough at vw, checked today

i have a feeling its the immobiliser not desarming, is there any way to bypass it to see if its that