hey guys, i just swapped an obd1 b18c into my coupe 95 dx and the vtec is just not working, i have manually hit it off before so i know the solenoid is good...but i connected the wires...green/yellow to a4, and the blue one to d6 and grounded the black one...and still no vtec...any help would be appreciated

 

are you throwing any CELs? how do you know for sure that vtec isn't engaging?? and how is the oil level??

 

Hows your oil level??

Is your wiring correct?

 

im throwin a check engine light...but im not sure what for...because the knock sensor doesnt cause one to come up right?...and the oil in the engine is fine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by andit10 &raquo;</TD></TR><TR><TD CLASS="quote">im throwin a check engine light...but im not sure what for...because the knock sensor doesnt cause one to come up right?...and the oil in the engine is fine</TD></TR></TABLE>

go get the CEL scanned and see what it is..your car is probably in limp mode and vtec wont engage until you get whatever is throwing the CEL fixed

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by andit10 &raquo;</TD></TR><TR><TD CLASS="quote">im throwin a check engine light...but im not sure what for...because the knock sensor doesnt cause one to come up right?...and the oil in the engine is fine</TD></TR></TABLE>

lol why wouldn't the knock sensor cause a check engine light?

If you're using the b18C ECU, the ECU senses that there is no knock sensor....and it will set a CEL.

Your VTEC should still work even with the knock CEL, though.

You know you can barely hear VTEC on GSR motors, right? It's at 4.5k. It's VERY VERY slight. The butterflies open at around 5800, which is what most people hear. If there is a vacuum line missing from the valve(s) that operates your butterflies, then you wont hear the intake change at 5800 RPM.

When are you listening for VTEC? At 4500 or at 5800?

 

no the knock sensor doesn't cause a check engine light, i just fixed some of the wiring and the check engine light went off, it's kickin off good now...thanks a lot for everything guys

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by andit10 &raquo;</TD></TR><TR><TD CLASS="quote">no the knock sensor doesn't cause a check engine light, i just fixed some of the wiring and the check engine light went off, it's kickin off good now...thanks a lot for everything guys</TD></TR></TABLE>

yes....the knock sensor would cause a CEL. https://honda-tech.com/zerothread/1901557

#23. Knock sensor.