i have an ls/vtec crx. what sensor is the green thing? is it the vtec oil pressure sensor? and do i wire it to my vafc first, then the ecu, or the ecu first then the vafc?

i am getting codes 21/23. one is the KS[knock sensor] and the other is the vtec oil pressure sensor if im not mistaken.

here are the pics of the green thing i am talking about:




all help is greatly appreciated, as i am a broke college student.

tia!

 

code 23 is knock sensor, code 21 is the vtec oil pressure, not sure if you wire it to your vafc or not, i dont think i did when i had my vefc, but that was years ago

 

How are you dealing with the knock sensor problem? If you got the car with the lsvtec setup in it, does it have a knock sensor at all? If you did it, I heard you can just ground the sensor to sim a reading. Anyone feel free to add to this.

 

Yeah man, LS/VTEC blocks b18a/b don't have knock sensors...however the ecu you are using is more than liking looking for a knock sensor. The green plug is a coolant fan switch or some chit like that, it is NOT knock sensor.

 

That green plug is vtec oil pressure switch. Extend it to the ecu and you can take from that wire to the vafc as well.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Fred n J’s_1.8’s &raquo;</TD></TR><TR><TD CLASS="quote">That green plug is vtec oil pressure switch. Extend it to the ecu and you can take from that wire to the vafc as well.</TD></TR></TABLE>

Better double check your info man. I dunno if that's right, not saying I am, but I'm about 95% sure.

 

I am pretty sure that is teh vtec solenoid switch, one is a ground and one goes to a4, that is if you have a p28
i send you a pm, i dropped a valve

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spankjelly &raquo;</TD></TR><TR><TD CLASS="quote">Better double check your info man. I dunno if that's right, not saying I am, but I'm about 95% sure.</TD></TR></TABLE>

ok, i am 100% sure that is the vtec oil pressure switch... as for connecting it to the vafc, you should first connect it to the ecu. from that wire, extend to the vafc.

 

teh green plug is teh vtec oil pressure, the fan plug is on the back of the block by the oil filter, unless its an obd1 block, then it should be by the thermostat

 

Is the green sensor in the pic being discussed the same as this one?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spankjelly &raquo;</TD></TR><TR><TD CLASS="quote">Is the green sensor in the pic being discussed the same as this one?</TD></TR></TABLE>

no sir, the sensor in the original poster's pics is located by the vtec solenoid assembly.

 

no....that is vtec oil preassure switch....that is the vtec solenoid...

 

yes the sensor i am talking about is on the vtec solenoid.

the knock sensor problem...i might chip my pw0 to avoid the KS.

code 21 is the vtec oil pressure sensor that isnt wired up. what does the plug look like that plugs into that sensor?


and i wire it to the ECU THEN VAFC right? and now...what pin on the ecu? [pw0]


this is horrible!! :uts gun to head:


Modified by ceLtic! at 8:07 PM 4/23/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Fred n J’s_1.8’s &raquo;</TD></TR><TR><TD CLASS="quote">

no sir, the sensor in the original poster's pics is located by the vtec solenoid assembly. </TD></TR></TABLE>

Ahhhhh!!!!

So the green plug in the pick I posted is the fan temp switch correct?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spankjelly &raquo;</TD></TR><TR><TD CLASS="quote">

Ahhhhh!!!!

So the green plug in the pick I posted is the fan temp switch correct?</TD></TR></TABLE>

yeah which is in the back left of the motor...thats the 'other' green plug.

now back On topic.

 

or could anyone take a pic of their green plug and what the wires look like for an obd0 car?

 

its the vtec oil pressure switch.

2 wires one blue one black

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HatchBox &raquo;</TD></TR><TR><TD CLASS="quote">its the vtec oil pressure switch.

2 wires one blue one black </TD></TR></TABLE>


they go to the ecu? what pin? b05 i think?

also....wtf can i get the plug that goes to this switch....cause its not on my engine harness, because i used the CRX Si engine harness.....

heheh....




Modified by ceLtic! at 12:16 AM 4/24/2005

 

gatta get one or ghetto rig it. If you buy a zdyne chip you can get away with 1 wire vtec http://www.zdyne.com

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2kTeg &raquo;</TD></TR><TR><TD CLASS="quote">gatta get one or ghetto rig it. If you buy a zdyne chip you can get away with 1 wire vtec http://www.zdyne.com</TD></TR></TABLE>

A customer went that route, well lets just say he ended up filing a lawsuit because the zydne ecu did not work and they did not want to give him his money back.

You can rip the plug from any car that has a vtec oil pressure switch. Some cars have vtec but will not have the oil pressure switch on them.

To make things a little easier on you ( since around here, finding a car in the junkyard with vtec is not the easiest thing ) look at the coolant temp switch on the head, right around that area. That plug should actually plug onto the green plug. Since all cars have a coolant temp swtich, it will be a lot easier finding that plug

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90blackcrx &raquo;</TD></TR><TR><TD CLASS="quote">
You can rip the plug from any car that has a vtec oil pressure switch. Some cars have vtec but will not have the oil pressure switch on them.

To make things a little easier on you ( since around here, finding a car in the junkyard with vtec is not the easiest thing ) look at the coolant temp switch on the head, right around that area. That plug should actually plug onto the green plug. Since all cars have a coolant temp swtich, it will be a lot easier finding that plug</TD></TR></TABLE>

Best info to tell someone....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hahagasdcrx &raquo;</TD></TR><TR><TD CLASS="quote">

Best info to tell someone.... </TD></TR></TABLE>


yes exactly what i thought...thanks for the idea...i'll see what i can come up with.

 

The grean plug is vtec oil pressure switch.

For the knock sensor, on the back of block there is provision for a knock sensor. It needs to by drilled and tapped. Or you can get the ecu chipped.

 

PM'd..hope it helps..