rockinTheDOHC

description pretty much says it all. already searched and i'm not grounding it in the engine bay since it was a b18a1 originally and there was no vtec wiring run.

pw0 ecu, grounding b5 to bypass the oil pressure switch.

basically i'm not grounding it at the thermostat b/c i'm running one wire only to the solenoid and that's it.

if it's unsafe or not recommended to splice back to the ecu ground at A16 or A18 then what is the best/closest place in the passenger footwell to ground to?

Relic1

I know this works for OBD1 and OBD2 ECUs, but I'm not 100% on OBD0 ECUs. I'd be shocked if it didn't work though...
connect the VTEC oil pressure switch line at the ECU to the VTEC solinoid control line at the ECU.
this makes it so the VTEC switch is grounded through the solinoid when VTEC is not on, yet transitions from ground at some time to prevent the ECU from setting the VTEC switch CEL.

rockinTheDOHC

so the idea would be just to bridge b5 (vtec oil pressure) to a8 (vtec solenoid) and run a8 to the solenoid in the engine bay?

i thought to bypass the vtec oil pressure switch b5 just had to be grounded...how would it help to connect it to the vtec solenoid wire if it transitions.

does this way just also happen to work or would grounding it be sufficient?

i always thought just bridging the two was a roundabout way of grounding it anyway.

Relic1

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rockinTheDOHC &raquo;</TD></TR><TR><TD CLASS="quote">so the idea would be just to bridge b5 (vtec oil pressure) to a8 (vtec solenoid) and run a8 to the solenoid in the engine bay? </TD></TR></TABLE>
yes
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rockinTheDOHC &raquo;</TD></TR><TR><TD CLASS="quote">i thought to bypass the vtec oil pressure switch b5 just had to be grounded...how would it help to connect it to the vtec solenoid wire if it transitions.

does this way just also happen to work or would grounding it be sufficient?

i always thought just bridging the two was a roundabout way of grounding it anyway.</TD></TR></TABLE>
if you simply ground the line, you will eventually have a CEL. as to why...
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">this makes it so the VTEC switch is grounded through the solinoid when VTEC is not on, yet transitions from ground at some time to prevent the ECU from setting the VTEC switch CEL.</TD></TR></TABLE>

rockinTheDOHC

gotta love it when someone gives you the whole answer the first time and you're just too dumb to get it until they requote it for you.

thanks!

can't test right now since i have the hood off from fixing the leaking passenger area.

well, i tested a little and at least no CELs for now.

rockinTheDOHC

vtec is engaging regardless of code 23. screw you 23, i hear that vtec...i can hear it like i've been granted the use of my ears this very moment...

Relic1

glad to hear it worked.

CEL 23 (knock sensor) is something you're going to have to either fix, chip the ECU to bypass, or get a different ECU that doesn't look for a knock sensor.

rockinTheDOHC

going to have to fix it why...i'm comfortable driving with the check engine light on if vtec still engages.

i will have to teach my wife to read ecu led blink language. if anything besides long long short short short happens then i'll look into it.

i don't know who stuck a 1.6 in my integra before i bought it, but i'm not out to treat it nicely. if the light being on becomes troublesome i will look into bypassing it on the ecu. if something goes awry, we have towing and then i will stick in a gsr.

thanks for your help!