ive been searching alot and cant really find a definitive answer b/c i didnt know what some of the terms and what they stood for...please help if you could, i really appreciate it

well its a b16a going into a 91 crx si...the problem we are having is the o2 sensors. I used the stock harness from the crx si like i should of and everything connect fine except for a couple things. On the crx harness there is a plug for the front o2 sensor for the stock header of the crx si but the new motor doesnt have a o2 sensor on it at all at that area of the header....so what do i do about that? thats the main problem i am having right now. Then there is an o2 sensor that came WITH the motor that sits where the header meets the cat...that is a 4 wire o2 sensor...what are we supposed to do with that? last one is that the crx si harness has a plug thing that has to wires u are supposed to attach to i think, like an oil pressure switch or something....it will connect to the d16a6 motor but on the b16a motor they change that over to a connector and not just 2 wires plugging in

ive been searching for 2 days and couldnt really find an answer...any input is appreciated


Modified by mr_ducksauce at 9:10 PM 11/8/2005

 

In order to use the 4 wire o2 you must convert your car to obd1. As far as your other questions send me some pictures of the plugs that you are talking about. I dont know whcih ones you are trying to describe.

 

theres no way to go around converting it to o2? and what do i do about the plug for the front o2 sensor? the plug in the back...its kind of like 2 things that sticks out and 2 wires that will plug up on it..but the b16a doesnt have that, it has a connector instead

 

http://www.rywire.com

 

need the help quick...cant wait on the shipping

 

sounds like you have OBD1 engine - what color are the distributor plugs? white=OBD0 & gray=OBD1 - does it have a sensor on the thermostat housing? - if so, that would be the cooling fan switch - on your Si, the cooling fan switch was on the back of the block next to the oil filter - big round black rubber plug with 2 wires that plug onto sensor on back of block - you would need to extend the wires and put a different connector on in order to plug into the sensor on the thermostat housing - if this is OBD1 engine, you will have other problems with wiring in the OBD0 car

 

yes it does have a sensor on the thermostat housing on the b16a....but that isnt any different than the d16a6...the main problem is there was an 02 sensor on the header of the d16a6 and now there isnt b/c the b16 doesnt have an o2 there ...so now i have an extra plug there.....and i see what you're kind of saying about the 2 wire thing that plugs in...so do i swap over that connector from the d16a6 so that the 2 wires plug in? b/c if i dont do that ...they will have different type connects - (1 is just a normal connector, the other one is those 2 seperate wires that is covered by that big black rubber piece)

 

bump

 

bump bump

 

g stupid

 

OK, 1st off your D16a did not have a fan switch on the thermostat is was on the back of the block (the thing you were describing with 2 plugs and rubber boot)

You need to extend the wires to reach from the back of the block and get a 2 pin OBD-1 connector to plug it into the sensor on the thermostat housing.

You have a OBD-1 engine. You will need to convert to OBD-1 and run the extra wires for the 4 wire O2 sensor. Signal, power, ground and heater.

 

the weird thing is...people identify the engine by the distributor plugs...white for obd0 and grey for obd1...the plug is white

 

searched!!!!!

 

so is this obd1 or obd0?

 

let a bro know

 

im guessing you have a motor tha someone pieced together.

1: no o2 bung on the header means its a gsr header, all b16 headers have o2 bungs
2:4 wire o2 but white plug distributer dont go together
3:fan switch on the thermostat housing makes me think its most likely an obd1 motor.

what to do: look at the cylinder head above the #4 runner. you will see a circle stamp with two numbers on it. those two numbers indicate the year the motor was manufactured. 88-90 is obd0 91-00 is obd1-2.


so, if you want this to work on an obd0 pr3 or pwo ecu you need to get the obd1 b16 lower header section that has the o2 bung behind the oil pan. use your single cam 1 wire o2 in that bung. extend the fan switch wiring to the thermostat housing and change the plug to match.if your distributer is obd0 and your car was already wired for pgmfi it should plug right in. you will have to add the wiring for the knock sensor, vtec pressure switch ( if it has one ), and vtec solenoid.

vtec solenoid: pin a-8
vtec pressure switch: pin b-5
knock sensor: pin b-19


if you need any more help feel free to im me

 

ok...now the problem is the car had a really bad idle and sputtered like crap...swapped over the map sensor from the b16a in the place of the d15a6....idles good and runs MUCH better...now, it still kind of bogs...so i put on a timing gun...when i rev up the motor, it will not rev past 4k...so i put on the timing gun...it will flash but once it hit 4k the timing gun doesnt flash any more...kind of like cutting out the motor or something...i cant seem to figure out that problem..any input?

 

could this be a bad distributor?

 

also has codes...turned the ignition key on...looked at ecu for flashes..no flashes at all

 

HELP!!!!!!!!!!!!!!

 

what is the code on the engine block. is it a b16a1, a2,a3

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtechrex &raquo;</TD></TR><TR><TD CLASS="quote">what is the code on the engine block. is it a b16a1, a2,a3</TD></TR></TABLE>

He said b16a..

 

b16a from japan...changed the pr3 back to the d16a6 ...and now it runs perfectly fine...i think the ecu we received was messed up...so gonna need to find me a pr3