Technical Questions & Answers

Hi guys, hoping someone has had this and can shed some extra light. i’ve traced a misfire back to 2x neighbouring cylinders both getting no spark. known working plugs and coil packs have been switched and swapped to test and it seems to be the coil pack loom. anyone experience this? it’s a UK 93’ TT Manual thanks :)

Hi Guys, I'm new here and sorry for no introductory post yet but have an issue with my Z and I'm told you guys are a fountain of knowledge. Ive a 93 Jap import 300zx TT manual. My issue is I started her for the first time in about 2 months (only driven for events or good weather). I was just leaving it warm up while fitting a new steering wheel when I notice the fuel dropping very quickly. I turned it off and got out and notice petrol in front of the right exhaust, upon inspection then once off I noticed it was leaking from the mid section of the right exhaust. Does this sound like an injector is stuck open? As im assuming otherwise the fuel would of stopped once I turne…

While rummaging around the fusebox area I noticed these two connectors not attached to anything. Anyone know what they're for?

Is there a fuse for just the sidelight?

So I’m trying to diagnose a misfire as she gets warm it gets worse plugged nisscan in and this is my data How do I upload a photo What’s the correct readings I should be getting anyone notice something that’s not quite right 🫶

Does anyone know the way to de-pin the stock audio female connector? I've tied all of my de-pinning tools that fit but nothing works.

Does the A pillar interior trim panel just pop off or is there anything I should be careful about?

I'm new to 300ZX ownership so apologies for the number of questions I'm asking. I'm acquiring components to upgrade the infotainment system, this includes an Android head unit with matching amplifier connected by SPDIF. I understand that if my car has the Bose system I'll need a bypass, but I don't want to buy one if I haven't got Bose. So my question is, how can I tell if it does or doesn't without taking off a door card or rear speaker enclosure?

Hello everyone, this is my first post in the forum as I mostly use Facebook, dare I say forums were a little before my time. 😛 Does anyone know where the ECU(s) pick up the speed sensor signal from? I am wanting to bypass the converter chip and wire it directly to ECU before it has been manipulated by the converter chip. As many people have stated in the past the speed sensor sends it's signal to the clock and then the clock relays it to the ECU but I'm struggling to figure it which wire it is. If anyone could help I would really appreciate it. Also I don't really fancy fitting UK clocks as many people have suggested.😉

My reverse lights (and reverse camera) started playing up intermittently and have now stopped working altogether. IT doesn't appear to be the fuse so I'm thinking it might be a dead reverse switch. A little puzzled if so as I had a manual conversion with a brand new '98 spec box and would assume (though not sure) that a new reverse switch would have been part of that conversion. In any case, if it is the reverse switch which has died - has anyone ever replaced one of these without dropping the gearbox? How difficult would it be to do? I've only managed to find one video online and it wasn't a particularly good / helpful one for a newbie to the job, like me.

1990 Nissan 300zx coupe Anybody have any experience removing the Heater Pipe assemblies without pulling the engine? The return pipe assembly bolts are visible from the top. I can't see the feed pipe bolts from the top or bottom. Also, the sec223 pipe assembly has been disconnected from all water hoses and bolted connections, but cant seem to snake it out, any suggestions?

The lever to release the fuel flap and open the boot has ceased to work properly.... I can no longer release the fuel flap, nor will the boot shut properly - any ideas? Could the cable have stretched or got stuck on something - and how easy do you reckon it is to fix. I do have a spare brand new cable if need be, but I have my MOT on Monday and the tester will need to access the fuel cap 😞 I guess I could pre-open the flap by pulling the cable lever behind the near side tail light - luckily I don't need petrol just yet LOL!!

Hi all, my prop shaft bearings are going (possibly) and I thought I’d look at changing to a single piece as I’ve heard it’s an upgrade as they are lighter. anyone know anything about them? Where I could get one? Are they an upgrade or am I wasting my limited squids?

Hi All, I've got a 1990 2+2 N/A Z32 that has had a major water leak at the rear of the engine. I've managed to remove the heater return pipe at the rear of the engine on the drivers side and it has a hole in one of the smaller stems coming off the main pipe due to rust. Part catalogue shows it as 14053-40P01 but I can't find any like for like replacement, at least not an N/A pipe. Has anyone replaced one of these before and knows where I can source one from? I would try filling the hole but seeing as its already rusting out, I'd prefer to get a new one. Also getting it out has been a hassle so if I could replace it with a new part and forget about it, that would…

Hi all, Very new here but purchased a UK 300ZX TT back in February and been having some bits done to it over more recent months. Quick question: Is there anything in particular that would cause cloudy / black fuel before it hits the filter? Post-filter; it's cleaner but not clean. A new fuel filter has been installed. I very much welcome your suggestions. Thanks!

Hi everyone, I've hit a bit of a wall with my 300 and it's auto box. It won't shift up into 3rd when driving, 1st/2nd/reverse all work fine. I've had it a gearbox repair place and they couldn't do anything with it as non of their plug in machines could read it and the same with an auto electrician that I took it to, however the gearbox place said that it needed about 3 litres of fluid to get it up to the correct level. They did say that when they took it out all the gears that worked were now shifting nicely but it wasn't even trying to shift up to 3rd and they suspected more electrical than mechanical but obviously not 100%. I'm sure someone here might be able…

So I just bought a rhd 1995 300zx twin turbo 2+2, all around car is amazing but my seat will only go so far back. Every control works on it goes all the way forward but just won’t go back far enough and I’m 6’2 my knees hit the bottom of the steering wheel and front of the dash anybody know a fix to make it go back more bc my passenger seat goes back all the way. Thanks

I was having trouble with my 91 TT reving on it's own from 1500 to 2000 revs. The car recently wouldn't start and i thought i'd tracked it down to a cracked and corroded CAS plug. I've since replaced this and cleaned quite a few of the other plugs, but now it revs on its own. It also at first was popping and banging like a rally car and the exhaust was getting too hot to touch, which it didn't do before. My data scan is showing codde 55 - no faults, before it was showing an ignition fault, i think code 21, any ideas? 20240614_175114.mp4

Can anyone explain how to take SNAP RING off end of bmc ? And can it be reused afterwards ?

So I just installed a wiring specialties harness on my RHD z32 NA, but after installing everything it won’t start, the engine will crank, but it will not run, me and my friends have tried changing the chassis ground and intake grounds but to no avail, all the wiring is in properly and everything is lighting up on the dash like it should, I even checked the PCM for any codes flashing on the potentiometer, but it gave me the 5-5 all good code, could there be something that I’m missing?

Hi All Whilst searching for the still illusive idle adjustment screw I came across these two plugs going nowhere! 1) Does anyone know what they are? They are adjacent to the auto gearbox dipstick (see photo). 2) Does anyone have a picture where the idle adjustment screw is located on 1991 TT. Thanks in advance Martin

My car has the Altia sill plates...except they don't work. We've tested both sides whilst off the car. Does anyone know the spec of the light strip if I wanted to try and replace them? Bonus if you know where I could source it from too!

Hi all, Was out in the car last week and my speedo stopped working. Not the whole cluster, purely the speedo. Everything else is working well. This then caused my steering to be heavy and HICAS light to come on, which I’ve been told happens when the speedo dies. Whats the likely problem here would you think? I would argue not the cluster itself but maybe a speed sensor?

I have the usual JWT Pop filter on my Z but due to the chassis brace at the very front of the car (that I think is UK spec specific?) I have to crush the filter, both against the brace and also on the top when I install the nose panel. This ends up messing up the filter over time and makes refitting the nose panel a real pain. I know the HKS super power flow is shorter but I wondered if anyone knows if this fits better with the UK spec front brace still in place?

Hi Guy's, Girls & Others. As I’m rebuilding the whole rear end my attention has turned to the drive shafts, the boots look in excellent condition but as they are 33 years old, should I replace them. I will be cleaning and re greasing, painting exposed parts. CZP have replacements but tax and delivery add up, any other recommendations. pic for ref only everything has been dismantled.