hello, to all iam new here trying to seek some advice about a new to 1998 volvo v70 2.4 l5 just bougth the 4 my daugther, 4 school the car has 177,00 mile on it nice looking car But the car is giveing code,s p0300 -p0302 -p0303 it,s tell me that number 2/3 CLYDLINER,S ARE BAD CHANG THE PLUG,S and wire,s cap/rotor fuel filter/ oil clear the codes and still the car run,s a bit rough the mech,, told me to replace the engine with a used 1 but if anybody out ther can help me FIX this with out replaceing the engine i would be thankful any TIP ,s thank you melymel