I was working on my car the other day with my brother, trying to figure it why it failed emissions when we noticed that a couple of the connectors were burnt. I think my brother said they were the idle valve control connectors, or something like that. So I was just wondering if these are important at all to the car or if they affect it in any way. The connectors are burnt, gone, definitely won't work anymore and I can't seem to find a place to buy them anywhere. I went to the dealership but they don't sell the connectors separately, so I would spend about 500+ for the whole system all for just for 2 connectors. So could this be a possible cause for failing emissions or a lack of power? The car runs okay, its just lacking a lot of power. I already changed the basic things like spark plugs hoses etc, and if it fails again I'm changing the catalytic converter but I'm a little worried now that it might just be these connectors. Any help is appreciated.
If it is a 6 pin connector that is the same as the Maximas from 1998 to 2002 then I had some special made for my repair shop in doing the common IACV repairs. Search ' Nissan Six Pin Pigtail ' on OKorder. Thought this may help you.
IAC-AAC idle air control air conditioning air control (idle speed device) electrical connectors are (BOSCH) square pre 1994 and oval (hitachi) after 1994. A good mechanic can make something work. Idle speed is important to emissions however you did not state why the car failed was it emissions or something else like a engine light being on. Trouble codes are limited to a two flashing light red and green on the computer in the right side floor board if those lights are lit your car has a fault the engine control is seeing. What you need is a good old gray haired Nissan technician that can get the old Z back on it's tires. There are procedures on-line for reading the trouble codes in mode 3 using only a small screwdriver. But very gently turn the screwdriver slot breaking the switch off of the computer and your walking. Good Luck
You should probably change out your wiring harnesses. It is expensive but if you have connectors burnt out, this could lead to more problems down the road. In a car as old as a Z31 or Z32, the wiring gets brittle from the heat in the engine bay. Changing the harnesses in my car solved several issues. Unfortunately, I now have to change the CAS (Crank Angle Sensor). I have not had a year go by that I haven't had to spend a couple $K fixing systems. I would also suggest getting online to the Z forums. People on the forums will have dealt with the same issues you are. You should also look for a Z club in your area.
