Multiple questions, single post, hoping someone can make sense of what I'm about to ask.

 

When I bought my NA shorty, there were a couple of connectors unplugged in the engine bay. I drove like this not noticing them for a while, noticed them and plugged them in. No difference seems to have presented itself aside from a slight hesitation if I floor it at low revs. Not sure if that was there anyway.

One was on the back of the engine, dead centre, just behind the plastic throttle cable cover, the other on the left side of the engine, tied to the head (looking from the front).

Pics enclosed.

Any ideas what these doohickeys do?

 

Second question...

What headlamp bulbs does this thing need?! Both my local motor parts place and Hellfrauds recommended H1 bulbs. These really don't fit. At all.

For a start, the connectors are two pin, not one as an H1 bulb has, and they don't fit snug in the holder, or even light up.

The bulbs that are in there already (pics) dont really fit either. You have to wedge them in at a jaunty angle as the clips aren't remotely long enough to reach them when they're located properly in the housing. This of course means half the light leaks out and the headlamps are about as much use as throwing matchsticks down the road.

I don't mind using these bulbs as I can turn up some ally rings to sit on the back of the bulb and bulk them out so the clips engage, as the bulbs sit well in the housings and light up adequately, but I have no idea what these bulbs actually are! No one seems to know.

So, looking for what these bulbs are, or what the correct ones are, or have I just got weird headlamps. Two hours googling JDM Z32 headlamps showed very little.

 

Any ideas what this thing is?

 

Or are LED conversions worth the time.

A 12 quid cree LED bike light shone through the back of the housing produced about the same result as the standard lamps did, so...

 

Thanks guys, this one's had a group of seasoned S body bods and me scratching our various heads about all things old and Nissan.

Bulbs are H1 for main beam, they actually sit in the adaptor in the back of the light, main beam is H3C and the O2 sensors are disconnected, which means the ecu will run a means setting, quite common if the O2 sensors are duff :thumbup1:

Ah... so which of the two holes in the connector does the pin on the H1 bulb go in?

Are both those connectors O2?

Seems like a funny way of arranging them. The perfectionist in me just wants the loom to be symmetrical for both banks!

It's been smelling rich as hell, and dead O2 sensors/disconnected would explain that. Are they pricey is the terrifying question...

There is one for each bank, i never noticed it too much in mine, i ran it for years with them disconnected, but i also deleted the egr and canister behind the front bumper. O2 iirc are around £70 each.

 

The H1 adaptor https://www.300zx.co.uk/forums/showthread.php?180302-Main-Beam-White-LED-H1-Bulb-Fitment&highlight=main+beam

The white sheathed cable you see along the same frame are the variable valve timing feeds, again one at the rear and one on the drivers side you see in the pic, if you are going to plug new O2's in at some point, dont get them mixed up lol

You need to use the H3C bulb for the dip beam as groover said or order a H3 HID kit, don't us the H1 the bulb position is completely wrong for the reflector design.

H3C bulbs are still available just not in the majority of UK motorfactors.

Of course there's a weird sub-design of H3 that no one uses or stocks except Nissan! Wouldn't be fun otherwise, would it.

 

O2 sensors sound like they can wait until I've sorted the rear suspension bushes, but do they actually make much difference to how the car runs?

As mine's a daily, the miles per gallon do matter to me!

O2 sensors would only be disconnected if they were diagnosed as faulty, its better to run the car without, with the ecu utilising a means setting, ie a middle ground rather than duff readings from dead ones.

I used my NA for years without as a daily and cant say i noticed much difference, after all if you want good miles per gallon for a daily driver, then dont use a zed lol

 

Monitoring oxygen levels in the exhaust is a way of gauging the fuel mixture. It tells the computer if the fuel mixture is burning rich (less oxygen) or lean (more oxygen)

Edited April 22, 20178 yr by groover

I never expected it to be good on fuel, but there's no point just throwing it away, is there? Specially as the BP near me has broken its Ultimate pump, and the nearest superjuice is a 20 mile round trip...

 

I may just re-disconnect them then. Seems to have made no difference to high rev running, but it does labour under load at low revs where it didn't before.

I'll buy new ones once I've finished the useless cosmetic stuff :)