I have a DOHC ZC in my 1990 hatch but I have a problem.

I am going the Harness to Alternator wiring and everything matches up except the two thick white wires with no additional markings and one thin white wire on the harness.

I don't want to risk Trial & Error and mix up the two white thick wires and fry something.. so any suggestions?

 

pics

 

You can mix them up. One way will work, one won't. Done it lots of times. Just don't leave the ignition on for a long time with not knowing if its hooked up right or wrong, the distributor will get warm if its backwards.



You can look inside the distributor also and see if the two white wires are different colors inside, since they aren't exposed to the elements and havn't been bleached.

 

hook them up and see if it starts but you should really solder the wires cause those connecters suck

 

I got it to start! The Now here is my issue.

It will NOT start if any wires are connected to the Crank Sensor. If i disconnect them, it starts right up but bogs down hard if I try to rev.

The green/blue green/yellow wires I am supposed to have left over from the distributor plug do not exist. I only have this thin solid green and a thin solid white.

I guess my question would be... Where do the wires from the Crank Position Sensor go? I will just run them straight there I suppose with separate wires.

 

Wow, i can't believe you cut your wires!!

When i had my dohc zc swap back in the day, i took the square and the round dizzy plugs, and repined them colour for colour, took me all of 10 mins=done!!

 

im sorry but using butt connectors on your dist wiring is very hack.....once you have ti figured out please use solder and heat shrink and do it properly...

 

I have redone the wiring to the dizzy. I actually got some male / female connectors and the dizzy wiring is 100% done, safe, sturdy.

Anybody got any idea on the wiring for the CPS?

 

does this help any?
http://www.phatwhippincrx.20m.com/photo6.html

 

Except for step 6...

6.You now have two extra wires which are Blue/Yellow and Blue/Green

I do not have these extra wires! I just have some thin white and a thin solid green extra.

I need to find out where the blue/yellow and blue/green wires would go so I can run them myself.

 

sounds like this was originally a DPFI car which didn't have the blue/green and blue/yellow wires in the eninge harness - these are 2 of the wires that need to be added when doing the DPFI to MPFI conversion - evidently, whoever did the conversion used a green wire and a white wire (unfortunate, as you now have 3 white wires to contend with) - you need to run a continuity check and see where they go - the cylinder sensor (which is on the end of the exhaust camshaft on the DOHC ZC and in the distributor on SOHC) has a blue/green wire that needs to connect to ECU pin C1 and a blue/yellow wire that needs to connect to ECU pin C2

for the other 2 white wires, if you open up the harness for a little ways back, you will find that one of the white wires has a thin black shielding around it and has little red hash marks on it every few inches - this wire is for the crank sensor - the other white one is for the igniter

 

Finally the help I needed! Yea Rywire did my harness and everything works great except for the camshaft position sensor wires.

Thank you for letting me know where the CPS wires run to. I am going to run them directly to the correct spot!

 

I have another problem. I took the two wires in C1 and C2 and plugged in the wires from the Crank Sensor. It did not start. I then read somewhere that the pins you removed out of c1 and c2 need to go into B10 and B12 so I did this.. It still did not start.

The car ran but would bog down when I hit the gas BEFORE i tried your advice. Now even when all the wires are back like they were when it ran... it won't start.

I get code 4, 8, 10. I put in new plugs, wires, cap, rotor. I got gas and spark. Engine turns over. Nothing happens... no matter what combo of c1, c2, b10, b12 cps / crank sensor wiring i try.

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I cleared the codes. I cleared 10 by switching the wires on the connector.

I cleared both 4 and 8 by having the wiring like so...

C1, C2 = Crank Angle Sensor (the sensor on the left of the cam)
B10 = Orange from CPS
B12 = White from CPS


So I cleared the codes and now it just turns over and never starts up. It has gas and fire.

 

So after replacing my Wires, Plugs, Cap, Rotor, Coil & losing 1 inch of hairline over wiring up this DOHC ZC I still did not fix the issue. It wasn't until my friend Ricky came over and switched my distributor wires that it ran right.

We were using this diagram for the firing order. http://thezcr.com/forums/showthread.php?p=103794

He got an idea to just reverse the order and it ran perfect. I dont know how in the hell that fixed it but it did.

Also do not use RYWIRE instructions.. they were really messed up. In their instructions they say to put the crank angle sensor (mine were blue/green and blue/yellow) wires into B10 and B10 but you really need to put them into C1 and C2 and then put the Cylinder Position Sensor (orange and white) into B10 and B12.

I would follow this wiring guide because its the most accurate. http://www.fourthgenhatch.net/mpfi.html

Will start my build thread this weekend now that it fuggin runs.