Mk4 agu not starting

[luke]

Car started when I finished work but cut out a few seconds after, tried bump starting it but no avail, then tried with battery booster which didn't start first time but after a minute did, ran fine and changed the battery then tonight, driving home it started spluttering and juddering, then cut out again, any ideas?

[navmk4gti]

Have you scanned it? May be your ingnition amp which is on the air box

[luke]

Have you scanned it? May be your ingnition amp which is on the air box

Haven't yet, was thinking of buying one this weekend too, I first thought it could be maf related as it ran rough before and the maf was loose, it has an aftermarket cone filter so checked all surrounding plugs

[navmk4gti]

Unplug the maf then see how it is ...not heard of maf stopping it starting tho.. may be the reason it runs ruff

[luke]

Going to take the old battery tomorrow and fit it and see if that will make it start to nurse it home

[cullygti]

Maybe a failing crank sensor like mine buddy 

[luke]

Looks like my bonus isn't being spent on my holiday to lanzarote and more spending on this little fecker, not treating it to coilovers now 

[luke]

Been back to the car this morning, didn't start, took the fuel return and fuel pipe off and tried to start which it did for half a second then cut out, then put the pipes back on and started up and nursed if home

[luke]

Can't hear the fuel pump priming, will be going to the local vw breakers later to pick up a cupra r fuel pump and going to see if they have any crank sensors in stock, fit them both and see if problem persists

[jamie16v]

fuel pump relay perhaps?