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ok my r33 rb25 under 4th injecter put my hand on it and give it a little rev here this poping sound and feel it kinda nock car still drives ok mayb bit slower no smoke nothing not sure if ive blown a piston or not sure if its the coilpack can someone please help me, is there anything else i cud consider as a problem pistone rings coil pack the spark plugs r good checkd those

Punctuation kinda helps so what you asking makes sense...

So your not sure if you have blown a piston but you have checked the rings and they are OK???

Forgot to look at the piston while you were checking the rings??

Your also not sure if its the coil pack but at the same time you have checked them and they are OK???

Maybe go back and re-post exactly what your problem is and what you are trying to find out but this time put it in proper sentences so it easily understood.

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