Hey I have a ZC in my '90 civic SI and the time has come to replace the valve cover gasket and I need a new wiring harness as the guy who installed it was a failure at life and caused me more grief than necessary.

Can anyone please let me know what generation ZC this is?
ZC 2213175



Thank you guys

 

Black top OBD 0 87-91. Gen 2.

 

correct me if i'm wrong, but isn't there a date stamp on the head near the handle of the dipstick?

 

Ill check the date now, '88 on the head by the dipstick..

Thank you guys very much!

 

nice zc bro makes me sad to have sold mine

 

The guy I bought the car from failed at wiring it and I need to basically rewire the entire engine.. Anyone know where I can get a kit? I have no experience wiring so I am taking it to a shop..

Does anyone know what OBD the civic is? (1990 Civic SI) it is "OBD 0 MPFI" right?
and the ZC is OBD O MPFI as well. So where do I go from here? Sorry trying to learn fast heh

 

what is wrong with the wiring?

 

>..< The shop I took it to said that it is the wiring.. plus when you look at it, it is the shittiest wiring job I have ever seen.
But the problems are as follows, and everyone is saying its electrical

"I looked back at the ecu, and it is throwing a few codes... (7 blinks - TPS) (8 blinks - TDC) (14 blinks - IACV)

Could this cause the car to bog out(It cuts out and will only rev to 2000 rpms untill I cut the power then it is fine, even whilst driving.) when and only when I floor it?

The car will randomly not start, something with the clutch, because if I slam it hard enough it will start sometimes

The car is running extremely rich.

There are no check engine lights."

 

also a few of the wires connecting to the Dizzy are frayed and 3 of them I had to electrical tape back together, heh.

 

don't know how they could screw it up - wiring for the DOHC ZC swap into the Si is about as simple as you can get - the only change needed is at the distributor - remove the round 7-wire connector from the Si engine harness and replace it with a rectangular 5-wire connector from any 88-91 DPFI CRX/Civic or 88-89 Integra or OEM DOHC ZC engine harness - just match the 5 wire colors on each side of the connection - obviously, if you are repalcing a 7-wire connector with a 5-wire connector, you will have 2 wires left over on the engine harness - they are blue with a green stripe and blue with a yellow stripe - add a short piece of wire to each of thes and extend them to the Cylinder sensor on the end of the exhaust camshaft, again matching the wire colors - everything else on the Si harness plugs right into the ZC sensors - you will have one connector left over which went to the Fast Idle Control Valve on the back of the Si intake manifold - just leave it not connected as the ZC doesn't have a FICV

your best bet is to try and find an uncut 89-91 CRX/Civic Si engine harness and start over - not an easy thing to find these days

most of your problems are due to the codes - the clutch switch could just need adjusting

 

Thank you so much for the reply!

Any ideas on the fact that I cannot floor it because it will bog down and wont come back up untill I restart?

 

probably the TPS (code 7) or it could be the TDC (code 8) causing the ECU to go into limp mode - only way to cure it is get rid of the codes - the code 14 may be because it has the wrong connector plugged into the EACV or could be low coolant level - the connector for the EACV is 2-wire with black with yellow stripe and blue with yellow stripe wires - the connector for the FICV (which you don't have) is just like the connector for the EACV except for wire colors - it also has black with yellow stripe and the other one is just solid blue (no yellow stripe) - easy to get them swapped

 

On the back of the Programed fuel injector thing there is a black peice I think its on the IACV but this peice plastic that has a cable running to it, I just plugged the cable in.. I wonder if it fell out and caused all this?!

 

ROFL!
Fixxed it

 

, lol. Congrats on the easy fix.

 

Time to throw back in the Integra ECU, was running the stock one trying to lean it out but no smoke, not much soot, and I can floor it :D

 

Suggest you pick up some heat shrink tubing and clean up the wiring mess - or you'll be back to this square again......

 

x2