Ken's z31 I wanna go fast build

[Zrbsliding]

Left to right: Afr gauge, blower motor switch , Choke cable to actuate coolant valve and digi volt meter.

[Zrbsliding]

Funny how life happens and projects get the back burner and then the fire gets lit. 
I now have a Cast forward Facing plenum and lq9 coil packs. I got the car to fire but it ran terribly. Would idle around 13.5 afr then go to 11.5-10.5 and choke. Swapped around coils and even got some known working ones off a friends r32 which seemed to help but I wasn’t convinced the igniter wasn’t bad or Ecu was the issue. Since I’m running all aftermarket parts figured spark upgrade was needed.

I also found a mess with how the shop build by the original owner of the swap had made of the harness and wiring. I wish we had skylines in junk yards here because the loom may need replacing.

Edited March 9, 2020 by Zrbsliding

[Zrbsliding]

Will be getting that s13 subframe swap this July.

[Ben C34]

36 minutes ago, Zrbsliding said:

Funny how life happens and projects get the back burner and then the fire gets lit. 
I now have a Cast forward Facing plenum and lq9 coil packs. I got the car to fire but it ran terribly. Would idle around 13.5 afr then go to 11.5-10.5 and choke. Swapped around coils and even got some known working ones off a friends r32 which seemed to help but I wasn’t convinced the igniter wasn’t bad or Ecu was the issue. Since I’m running all aftermarket parts figured spark upgrade was needed.

I also found a mess with how the shop build by the original owner of the swap had made of the harness and wiring. I wish we had skylines in junk yards here because the loom may need replacing.

If you have a spark issue wideband will go lean.

[Zrbsliding]

Good info, one would think the lack of spark but still having fuel would make it go rich. Car has nistune but I’m not convinced the ecu isn’t damaged from sitting for 6 years out in the elements from condensation. We get a lot of rain here.

[Zrbsliding]

The car sat without a hood for 6 years and only a car cover. I’m also considering the Z32 maf got damaged because it will read 13.5 then go to 10.5 

[Ben C34]

5 hours ago, Zrbsliding said:

Good info, one would think the lack of spark but still having fuel would make it go rich. Car has nistune but I’m not convinced the ecu isn’t damaged from sitting for 6 years out in the elements from condensation. We get a lot of rain here.

It is counter intuitive, but not having combustion take place means there is heaps of o2 left over, rather than most of it being used up from the burning of fuel. I’m sure someone can explain that better!

j