S3 will not start???

darren t

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So I decided too for a da-31 pump fitted it with relay ect inline 20amp fuse and spliced trigger of wiring off the oem pump under back seat......
took car out for a drive all ok went local scrap yard for a relay for my mates install drive home all fine misis goes too her mother in laws with the kids and I get a phone call saying car was spluttering do advised her too pull over and check pipes she knows the usuall suspects!!!
i drive down In van started car up and it was misfiring violently so I cut it out disconnected maf same result after trying too start again no luck just turns over going over now with vcds too plug it in only code I did get off a crapy fault code reader is 1810 or somthing all I remember is terminal 30 voltage too low???tryed disconnecting fuel pump (da-31) same can hear oem pump prime
 
Just noticed this is a double post, just bump your old post instead of a new one. Someone will answer soon.
i think a mod will lock/delete this one