O2 sensor change

[RUZN]

ok so I completed my 300zxt ECU swap into my 280zxt. Now it Says to change out the o2 sensor to the 3-wire sensor. So before I got buy a new sensor, where do the other two wires go

[Bernardd]

Disconnect the o2 and don't worry about it unless you have emissions to pass. Make sure to set your timing when the engine is fully warmed with the tps contacts closed to whatever that year of z31 ecu calls for.

[RUZN]

Awesome TY for Reply.

 

Weird thing when I used the other Pigtail that hangs to the side of the tps (300zxtt 1991) I got wicked accelleration but then after about 3 seconds it would go pop and die to idle and do a accell decell accell decell unless you just barely pressed the gas. so Im looking at wiring diag again.. But I think Ill just go grab another TPS off a VG30 tomorrow that dosent have that extra pigtail. easiest bet

 

again ty much for reply

 

oh also!

I dont have a timing light as Im waiting to go into schoo now for Mechanics so im not at my shop.. anyway to set it without or should I just leave where it is now? I think it has to be reset to 24btc? for the z31ecu? no?

[Bernardd]

Depends on the year of the ecu. Look on z31.com for the specs.

[RUZN]

ok kewl ty again very much. I got the other TPS today off a 300zx n/a that was in the junkyard with one connector so hooked that up.. Ran awesome for a bit then kinda sputtered so I figure I should set it again or yeah the timing thing. blowing a bit of black smoke RAW fuel so.... hehe.. more adjustments obviously yes?

[RUZN]

OK so trying to mess with TPS I get great throttle responce now. Everythign I expected maybe could have 5% more juice but this happens.. When I come to a stop say a red light. I go to drive again and its liek putputputputput and blows a bit of black smoke out back liek totally unburnt fuel for about 8 seconds then starts to go but cough and sputters the whole way about a block then starts to drive normal again.. Whats happening..

 

like how dose that happen after 5 mins of perfect stop and go.. is it because I unhook O2, or am I not getting enough Air? if so why?

 

I have pics of my entire Setup on my album.

 

heres a list of converted parts.

 

1987 Turbo 300zxt ECU

1987 Turbo 300zxt

1986 TPS 300zx N/A

1985 VG30 MAF (6 pin ABCDEF all hooked up proper)

1991 60mm Throttle Body (bored intake to 65mm totally sealed to TB)

1982 Turbo 280zxt intake Manifold (ported to gasket to head & head port)

1987 DIZZY

1982 Stock Downpipe with stock O2 sensor in (tried disconnecting and connecting same issue happens)

 

Again I folloed Afshins post to the T so from my knowledge im running extremely rich obviously causing thr Bog effect right? which would be that black puffs coming from exhaust.

If I wide open it after a couple seconds I get my throttle back but it still coughs and sputters sooo is it just the TPS not exactly where it needs to be or whats my next course of action.

 

I know that I need the different O2 sensor Bernarrd said I could run without which is fine either way I trust the word of Bernarrd sooo if he sees this what do you think man!

 

also should I rotate the Distrubutor cap am I firing to late?

 

Only other thing I can think of is when I disconnected the Injector pigtails I misplaced where they go but on wiring Diagram it says :

 

#1: is Green with White strip

then 2 and 3 and green with black strips

then 456 are the green with yellow stripes. so possibly ones not in the right order? I have 1 on 1 and the two black strips in 2 and 3 and the yellows on the 456. now will it matter where they are if 456 are all yellow? will I have to trace it back to ECU (GAWD PLEASE NO!!)

 

Cause I idle just fine so not sure whats up..

 

Any info or things to do next let me know