agian 91 hf crx w9ith a fresh B16 swap runs great but the vtec seems to not work so i check the silenoid by hooking it up to 12volt and it works fine then i hook a test light up to the wire coming from the ECU and drove it down the street and it came on (the test light) so i thought it worked (the vtec)
but it still seems to either periodically work or not at all.
Thanks for the help

 

you have to let the car get up to operating temperature for the solenoid to kick on. Also have to be going over 30mph.

When the motor is still cold your vtec wont engage and have a lower rev limit. If it is warmed up the transition into VTEC sometimes cant be felt or heard, especially on most stock ecu's.

Buy you a vafc and you can set your VTEC engagement point to where ever you want it at. Also with the vafc you can see what your rpm's are with its digital tach( a lot more accurate than the stock one).

If you still have the stock exhaust, and intake box, you may not hear the vtec kick in as loud as another car with cai, and aftermarket exhaust.

 

it was deffinatly at operating tempature and it does have an intake and exaust and i was driving around town and on the highway it just seems that it periodically works and my ecu is a pr3 and it is marked on top 95 vtec DA8.

 

so you have the obd 1 conversion?

 

no its obd0 thats just what the ecu says on it. its written in marker on it. I just took it out for a spin and the vtec didn't work then all the sudden started working again. it just seems to only kick on when it feels like it.
thanks for the help

 

loose pin in the ecu plug or loose connection somewhere in the wiring up to the solenoid itself. Can also be a clogged solenoid filter. Wonder why an OBD0 PR3 would have 1995 written on it. 1995 would be a obd1 ecu.

 

it is an xsi motor it has the 1xxxxxx code on the block does that have anything to do with it. well im going to go check it out tomarrow thanks for the help.

 

switch the wires on the pressure switch

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by davidcrx89 &raquo;</TD></TR><TR><TD CLASS="quote">it is an xsi motor it has the 1xxxxxx code on the block does that have anything to do with it. well im going to go check it out tomarrow thanks for the help. </TD></TR></TABLE>

I was for sure positive the 1 mil series was for the Si-R and the 5 mil was xsi...correct me if i'm wrong....
B/c i got a 5 mil OBD-0 White plug motor in my car.....
and i had thought it was an XSI

 

hmm i guess im not sure i was reading other posts i made and i was told it was 1xxxxxx was the xsi but it would make sense the other way around does any one else know?

 

switch which wires around on the silenoid or on the ECU and if i do what will id do?
Thanks

 

check oil level

 

Are you getting a MIL or not? Several things could cause it. If no MIL...

(-) Dented oil pan causing low oil pressure
(-) Low on oil
(-) Bad speedo cable (intermit.)

 

VSS = Vehicle Speed Sensor. My .02 cents.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hahagasdcrx &raquo;</TD></TR><TR><TD CLASS="quote">Also have to be going over 30mph</TD></TR></TABLE>

It's not mph, it's 30 km/h, or 18.6 mph.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 88cerx &raquo;</TD></TR><TR><TD CLASS="quote">check oil level</TD></TR></TABLE>
if you don't have the proper oil level or your engine oil is too dirty vtec will not engage or will cycle in and out of vtec due to loss of pressure or poor reading from solenoid. vtec runs off of oil pressure.