Running really slugish HELP

[w3ssr]

Im having trouble with my AUQ there are 7 faults. it started out with the temperature goin sky high and it saying STOP-CHECK COOLANT there was enough coolant in but it was bubblin over. I put my mates diagnostic machine on and it said p0300 - random/multipul cylinder misfire. p0301 - cylinder 1 misfire. P0302 - cylinder 2 misfire so im thinking plugs and/or coils for them 3 faults. P1296 - cooling system malfunctioning. P0135 and p0030 - front o2 sensor. And lastly p0171 - system to lean. I fitted a new thermostat and front lambda sensor to try and solve the problems but its gone really sluggish and temp still shoots up. I just need abit of help because i just dont no what to do MUCH APPRECIATED

[spikenipple]

Sounds like your water pump has gone.

[w3ssr]

Sorted the sluggishness it was a pipe with a bloody hole init Gunna fix that properly tomorrow. And might attempt to flush the coolant out and then run a hose pipe through it so i can illiminat a blockage IS THIS A GOOD IDEA OR NOT??