Hey guys I'm new here and I have some questions...

I have 90' ef civic sedan and I had decided to convert the dual carbs to efi and than to sohc vtec..

But I have some problems whit it, for example I can't lowering the knocking

I have D15b3 block and have soch vtec head( the head has the following numbers on it : p2j-2 95) and stone gasket set..

My pistons and my block is completely oem... Nothing was made with the block before it is original..

pistons are pm3.. I'm using megasquirt v1 ecu. Oem distribitor(d14a1)
My intake manifold is from d16y4..

A few mechanics are say you must change the pistons to lower the knocking and run it safely. And a few friend of mine saying the problem is from ecu and you must be change the ecu and the dist. of yours..

My problem are these ones thank you much for your answers..

 

haven't got anyone else lived these problems before can you help please ?