ok I just put my ls/vtec back to gether after blowing it about two weeks ago. I installed newer everything including a oil pump . and now vtec won't come on untill it reaches about 7k or 7.5k once it hits that point the first time it will stay on untill you get lower then 4.5k like normal but like it said for some weird reason it won't activate untill that point. it has worked properly once and then same thing. any body have a idea what is wrong sensor hooked up wrong ,low oil pressure any ideas would be great checked the vtec screen already and clean as can be. and oil is still so golden that you can't barley see it on the dip stick. oh ya and i Have tried two chipped p28's that worked fine and same problem. any ideas would be great thanks

 

Not getting enough oil pressure through your oil line to the head.

 

do you think the pump or a pluged line wold have more to do with that? would a b18a1 or b1 oil pump do that? It is supposed to be a gsr.

 

check your oil pressure. you need 50 psi or more

 

did you use a gsr oil pump or did you get some other oil pump

 

well got the problem fixed turns out to be a bad oil pump either they guy sent me the wrong one or it is going bad I just swtiched a 98 gsr oil pump in and BOOM presto vtec right when I want it like always so that is fixed thanks for all the help guys

 

ya u need to use a vtec oil pump.. either a b18c1 or b18c5

 

he had a vtec oil pump in it before. maybe the bearing spun because his old pump was messed up... You should take it apart shane, i bet the pump is shredded

 

well when I rebuilt the motor I used a different oil pump that was supposedt to be a gsr but obviously wasn't I swaped the old one out when I rebuilt for fear that there was some old shavings of the rod bearing left inside but anways all is good now glad to have it working again