viking-101

Ok i have an 88 crx si with a 89 crx hf engine nay harness with a b18b1 in it. i have everything connected and the motor is turning over but over by the driver side firewall where the injector resistor plug(green plug) and the plug that goes to a tan plug that comes from the driver side firewall has 2 wire that arent connected to anything( yellow wire and a white wire). A friend of mine say it one controls the top dead center sensor and the other controls the crank sensor. my questions are:\



1) Do these 2 wire control these sensors?

2)Which on is which?

3) What would i have to connect them to for them to work properly?

4) could this cause a vehivle from getting a spark?



If anybody has the answer please let me know. I dont know where else to turn to, so i wanted to ask the honda gods

crx_si-r

The Si and HF harnesses are completely different. Especially an 88. An 88 is essentially wired up like a DX harness with slight differences.

viking-101

Anybody

crx_si-r

Feel free to txt me
916-541-5266

jlicrx

first off, you cannot use the 89 HF engine harness with the 88 Si chassis harness unless you rewire a few things - don't listen to your friend - he obviously doesn't have a clue

on the 89 HF harness, at the driver's side firewall connector, you should have 2 yellow wires - one is for injector #4 and the other is for the EGR lift valve - how do you have the driver's side connector wired? - did you leave the round 8-wire connector on the HF engine harness and then swap a matching connector onto the Si chassis harness to replace the original rectangular 6-wire connector or did you swap the rectangular 6-wire Si engine harness connector onto the HF harness? - the reason i ask is that you need to have the correct yellow wire from the HF engine harness connected to the yellow wire on the Si chassis harness in order for injector #4 to work - if you still have the round 8-wire connector on the engine harness and didn't move any of the wires, the correct wire won't be hard to identify - the round connector has three rows of wires, two at top, four in middle and two at bottom - the two yellow wires should be in the middle row of four, right next to each other - the one on the end of the row is for the EGR lift valve and the one right next to it (second from end) is for injector #4 - if you swapped the rectangular 6-wire connector onto the HF harness, then you will need to check for continuity to find which yellow wire is the right one for injector #4

the white wire in the driver's side connector on the HF engine harness is for the igniter and not being connected is why you have no spark, and you should have a code 15 showing on the ECU - the problem is this: the white igniter wire in the Si chassis harness, that goes to the ECU, is in the firewall connector on the passenger side and not in the driver's side connector - you need to get the white wire to the right location on the passenger side

viking-101

i have everything for the injector resistor box and the littly tan plug that comes from the driver side firewall pretty much wire up right except for 2 wire which i dont know where they go to.



These are the 2 wire that i'm not sure where they go.

jlicrx

if you are using the B18B1 injectors, you need to eliminate the injector resistor box

viking-101

why would i need to elimatethe resistor box? is it because the retangular plug i swaped with the round one controls it?

jlicrx

B18B1 used saturated injectors which don't use the resistor box - B18A1 used peak and hold injectors which do require the resistor box

viking-101

So how would i fix the 2 wires?

crx_si-r

Those 2 wires are the following:
Yellow is egr lift, or injector #4 there are 2 yellow wires
White is ignition module

That's the difference on driver side plug, passenger has 6 different wires that need to e rewiered conpmetely

viking-101

So the white wire that is for the igniter could i i run it to the white wire over by the ecu and splice into it? or if you was in my shoes what would you do to fix it so that it could get spark egr valve?

crx_si-r

HF has an egr valve.

What I would do is get the correct harness for your car. If you start modifying or trying to make the incorrect one work, you will run into problems if you don't know what your doing.

I can build you one (or fix yours)
916-541-5266

viking-101

I want to use my hf harness. For the white wire could i run it to the white wire on the ecu?

crx_si-r

You can

viking-101

And would that fix the problem? and if i can do that where on the ecu connector or which white wire for the ecu plug could i connect it with?

For the yellow wire could i just tie it up?

crx_si-r

Just leave the yellow wire depined and you will be fine

jlicrx

unless it is the one for injector #4

Spug

Wire nuts?

Really?

crx_si-r

True, only one way to find out