I have a vtec b20 220whp 159wtq and a problem that goes like this:The idle is ok at 750rpm, the power before the vtec is ok, but after the vtec 5000rpm the engin misfire and their is no power at all. I check the wires, sparkplugs,roter,distributer,hondata and p28,injectors are ok 480cc,I tried to lean the mixture or to make it rich.Today I`m going to do a valve leak test but their is no reason wy they would have touch.PLEASE HELP!!!

 

take off the valvecover and have a gander. maybe something is wrong in the head and not leting vtec ingauge (<-- is that spelled wrong) I'm not a expert at this so someone correct me, this is just my 2 cents ,(sileniod????)

 

You maybe right because I find out that the vtec oil pressure dont come over 20psi wen it have to be at least 60psi.The pressure is ok (selenoid and vtec hose) until we reach the head , so something might be holding the oil pressure in the head and dont let the vtec engage.Thanx, I`ll post wen I found the solution