running ruff

hello everyone ive got a mk1 golf 1,8 8v and when i start the car up it is fine .ican go for about 10 miles then the car starts getting lumpy
and some time back fires all it wants to do at a juction is stall .do you think it is somethink to do with the 5 injecter help :cry:

unplug it and see, if no change then look elsewherre do a search on fuel filler neck rust that would be my suspicion

yes but the thing is its go new fuel pump/filter/and new tank .all my hear has gone gray :dontknow:

when this was done was the metering head wur and engine lines changed too? because a bit of rust could have got past the filter and knackered them up unfortunatly

ya is got new fuel lines back from the tank to metering head but  i will say its got old injecters and old injecter lines to the metering head