Hi guys, Newbie ere!,,,

Ok so ill start of by saying i own a ford focus 1999 1.8 petrol. Love these cars,, had 3 now and never had an issue with one until recently, So basically i bought it with a fault,I paid 250 quid. It had a cutting out issue. ive obviously as a ford owner had these issues in the past and thought nothing a bit of gaffer tape wont rectify. She said her mechanical friend said it was down to a vacuum leak.... ( BULL SHI*)... So driving it home and it starts to judder like she said it did sometimes, didn't think alot of it even though it was violently shaking me back and fourth. Every time id accelerate, normally in 3rd 4th and 5th it would judder and i couldn't really get alot of speed so had to drive 10 miles home in low gear. got to a slight slope and the car cut out... tried to restart .... NOTHING!!!! , Almost as if it was out of fuel... So i called out the AA, First guy...useless... "Yes Mr hobson , It appears to be a duff coil pack " As mentioned as a previous focus owner i no about coil packs and this certainly wasn't the cause.. Too rule it out i had it checked. ive changed the ht leads too.. after being towed back and checking this stuff out i called out the AA again hoping in the light they may spot something else... He asked if any work had been carried out. i Showed him it recently had a clutch a fuel pump and filter ect He said the first thing he would of replaced as a garage would be the crank sensor.... So i did just that.. Now trying to start it it would fire up and go to run and 2 seconds into it cut like there was no fuel or something.. Now i now the fuel pump is working as i can hear it on ignition. Ive checked the switch to make sure its all good. Ive checked fuses ect. Im now running out of ideas on what else it can be, some people say ecu some people say dodgy wires. ect, the problem is now though 2 days after the last aa visit and i nearly getting it started last nite... I call out AA today to try and give it that little push it felt like it needed to run.. Now its not sparking on the plugs again? Yet the ecu reads a signal on the crank sensor? Any ideas guys. I'm no mechanical wizz but with some instruction im willing to get my hands dirty here!