URGENT HELP required, not running

This has been doing my head in, all help greatly appreciated. Filled up with £15 petrol on friday, went to work, got car power washed drove for 40 miles, car lost power, would not rev then just died. Towed back to garage, found to be water in petrol tank (are fuel caps known to leak) as this is the only way water could have got in tank petrol from well known garage, and did not have any other problems with customers cars.Drained and cleaned out tank,blew lines through, started eventually, but did take time. Would not run worth a damn. replaced plugs, cap and rotor arm.starts first time, ticks over lovely, drives 200 yards and wont rev, switch off for 10 mins and does same again.The fuel pump is pumping fuel,is the problem the pump or filter, or is there something else i am missing. Filter is the in pump item, which is £30 from dealear, and pump is over £200, i do not want to buy these items if this is not the fault. Any help would be greatly appreciated.
99 v reg 1.8 5 door petrol

is there a filter / pump at the front about twice the size of a coke can black in colour may have a pump in it check that out. spray lots of wd40 over leads and cap etc...hope youve no other problems water doesnt compress...

looks like this...good luck chap cartman690...

Just your fuel filter needs changing, complete drain of the tank as well.

Are you sure it wasnt £15 of dodgey fuel?

cartman690 said:

looks like this...good luck chap cartman690...View attachment 2598

Click to expand...

yup carty were's ya bin?. . . .good pic,fink lessons from the willo is int order[oh no not the dads army gang]. . . . . . .

Thanks LR1796 filter arrived today, and fixed al my problems
Stuart