i never needed to become a member because searching answered all of my questions but i cant find the answer to my current problem...

i have a 1989 crx si with obd0 b16a pr3
i have no cel, oil is good wiring is good.. i had vtec on a switch so the solenoid is fine and the screen is not clogged..

still no vtec.. it cracked maybe twice over the past week with no cel but only for a split second and only in 1st gear.. when it vtec engaged around 5 or w.e it fell out by 6.5... im no dummy and mechanically inclined but im stumped only other thing i can think of is my ecu is crap... any help is immensly appreciated..

 

maybe the main relay?...
anybody? lol

 

you should wire in a VTEC light. into the dashboard. check the wire going from the ecu to the vtec solenoid and make sure theirs no breaks in it "check with multimeter" and if you do the vtec light mod, then thatll let you know if the ecu is engauging the vtec or not. and the main relay isnt wired with the vtec or has nothing to do with the vtec. if your main relay wasnt functional then your car wouldnt start at all...

 

with the vtec light i just tap into wire for the solenoid? n ground the light... and i just mentioned the relay cuz i kno it needs to be replaced soon. .. thanks for yo help glock

 

Is your speedometer hookup?

 

check all your sensors

 

For vtec to work on stock ecu it got be at operating temperture (warmed up), got to have vss signal, good oil pressure, and rpms high enough when vtec engages.

 

He says he doesn't have a CEL... OP are you sure your red LED isn't flashing?

 

are you low on oil?

 

From first post.

 

Anything odd about the engine, like 'no thermostat'??

 

How hot does your engine get? Does it stay close to the cold mark or half way between hot and cold.