Hey guys i own a 1997 impreza which seems to misfire/backfire(not sure what 1) it seems to jump back and forth and lose some power when i put my foot down, ive checked and changed wires and spark plugs,a friend told me to replace the coil pack to solve the problem..

What do you think?

Many thanks
Si

 

Could well be the coil pack

 

This aint my youtube vid but this is what happens in my impeza

YouTube - Legacy engine hesitation

 

thats failing coil packs , not getting correct spark

Could be Plugs , Coil packs

but could also be Camshaft sensor , knock sensor, injectors.

do you smell fuel when its hesitating ?>

 

na i dont smell fuel when it hesitates and i been told by a halfords mechanic its most likely the coil pack needs replacing which costs £192 from them

 

you can check your coil packs easy, does your car have a coil per plug or 1 coil pack with leads?

 

Its 1 coil pack with leads

 

£192 pretty pricey.

you need to check it for cracks, small hairline cracks can give a weak spark.

Check your coild leads also.

clean your camshaft position sensor and the crank sensor

 

Ok i will do mate thanks for all your advice i'll do it in the morning =]