b16, no vafc, non chipped ecu, 48psi fuel

at 4800 when vtec is supposed to engage it comes on and then cuts out rapidly and then at about 7500 rpm it finally engages properly.

i got a new screen and gasket for my v. solenoid. and still same problem

my oil level is full. i messed around with the fuel pressure and same result.

any ideas????

 

Sounds like an oil pressure issue.
It could be a serious problem or it could be something as simple as a bad vtec oil pressure sensor etc..

 

is the solenoid properly grounded?

 

its grounded to tranny ground wire
had bought a bran new oil pressure switch from honda so its not that. could it just be a bad solenoid

 

If your oil pump is going to shit... and not creating enuff oil pressure, this can cause vtec to disengage etc..

 

just put a new head on the car. everything worked before the head swap.

any ideas on that. could a head some how have the vtec mechanics damaged inside?

 

id say its the solenoid if your oil level is fine

 

check your v-tec soleniod and pressure switch connectors could be dirty thats was the remedy for mine sfter having the same issues as you.

 

mine did that when i tried to hook up a nos solenoid to it so the nos would hit the same time as vtec but it didnt work vtec snapped at 6100 where it was supossed to and then shut off at like 6800 or so and no vtec all the way to 8600 limit

 

missing knock sensor...could this couse the vtec to rapidly go on and off?