KnightoftheRound

Adjusted timing, set TPS, drove it today, and boy does it run good now. Hauls ass. Not as much as my other Z, but still hauls ass. That warning 280ZTurbo made in his "supplement" to Ashfin's write up is true, I guess I can say I experienced it first hand. After I realized that it wasn't the wire the fans were using as a + source, and realized that its whatever field/signal the fans make when on, I played with it a little bit. I took the intake piping off the front of the MAF, and pushed it closer to the fan motor while the car was running, and it started running REALLY choppy. I pulled it away, and it gradually got less choppy as I got farther away from the motor. Weird stuff! Consider this case closed.

I deleted my CC, and ran the vent line originally going to the canister, to a 240Z fuel filter, and then from the filter, straight down. Seems to work fine, haven't had any fuel smells that I recall.

Scratch everything I said in this post. Update: My dad has been telling me the whole time that the injector voltage is wrong, for the past 2 weeks... he suggested putting the dropping resistors back on to see how it runs with them.... Well, I slapped the dropping resistor pack back on, and you know what? It ****ing runs perfect, I have no explaination as to WHY it runs perfect with the resistors in place, but it does. I don't want to look at that car the rest of the night, ugh.

Those WERE new plugs. Yes, I have checked for continuity in the CHTS harness, CAS harness, MAF harness, TPS harness, and O2 (now disconnected) harness. None of those harness's, save for the MAF harness, were touched from the old setup which ran perfect. I rechecked the MAF harness today from the plug to ECU with an 84 Z31 diagram, there are no faults with it. I went to a local Z yard here, and tried an 86T computer, and an 84T computer, both had the same results. About to go out and RE-RE-RE-check all the damned harnesses again, this is so frustrating. FWIW, the switched 12v source for the MAF, I used one of the b/w VCM wires. For the switched 12v source for the Fuel Pump relay, I believe I used a wire from some connector that looks like -| hanging under the dash near the silver cylinder shaped thing that works the turn signals and such.

All the plugs look like this more or less: Video, sorry for the bad audio, the G1 can take nice pics, but a camcorder it is not. Car sounds like my dads turbo diesel Isuzu Trooper....

Didn't really help, just made it idle like crap at a slightly higher RPM. TPS seems to be working, it has no continuity once you ever so slightly give it throttle, and has continuity when its not being touched. Not sure if there is any more to it than that. All emissions stuff, and the VCM was removed long before this swap. All vac nipples that are not in use are capped with zipties tight around the caps. Going to try to get a video of it, my phones camera is good, but the audio is bad.

Hey all, unfortunately this is my first post. A little background on my car, it is an 82, with an 81 L28ET swap: I completed the Z31 ECU swap 2 weeks ago according to the writeup by Ashfin. ECU is a Remanned one from an 85 Z31T. The car idled great till it warmed up, and then it started sputtering HARD. From total cold, to the heavy sputtering, its only a couple minutes. Blipping the throttle will made it stumble and then go back to sputtering, holding the throttle down at all will kill it. It idles less than 500 rpm, barely. It ran perfectly with the 81 ECCS before the swap. Things I have done and checked include: New Nissan CHTS, checked harness continuity, both component and harness pass. New Nissan o2 sensor for an 81 L28ET, verified that it was giving voltage while the car was on, gave a steady .3ish volts. TPS is from an 83 NA if it matters. Has continuity at throttle closed, no continuity after slightly open. Checked harness. Tried 4 different MAFs, tested EVERY ONE against FSM tests, all check out. Current one on car is from a known well running car, along with the ECU. I had to have rechecked all the Z31 swap wiring 10+ times, and I see no error. Fuel pressure stays steady and never drops once warmed up (it actually goes up, due to bad vacuum from horrible idle) Unplugging the CHTS causes the idle to go smooth out and run fairly well. Car will not start without CHTS plugged in (as its supposed to, IIRC). CAS disk is in the correct oreintation, and is almost mirror clean with no debris or scratches. Tried 2 different CAS units, one from a perfectly running Z31T, and one from the 83 dizzy I am using. Timing is set at 20 BTDC. Checked harness grounds, at the grounds, and at the ECU plugs. Air regulator is working properly, and shuts once warmed up, it is also a new Nissan unit. Coil and Power transistor are from an 87 Z31. The only real running code the car has is a code 11, CAS, not really sure what to make of it, as the car ran perfectly fine before the swap. I don't have another ECU to try =/ I have been battling this thing for 2 weeks now, and I am getting very close to just breaking down and swapping the old 81 flappy box and ECU back. My problem is frighteningly similar to this Zcar.com post, on this guys 85 Turbo Z. http://www.zcar.com/forums/read/2/2022915/2022925#msg-2022925 but it was never resolved that I have seen. If anyone can provide any help or insight, maybe something I might have missed, I will love you forever.