Discuss all 300ZX (Z32) related Technical topics here - how do I diagnose, modify, repair etc Sat, 15 Aug 2026 04:32:20 +0000 Sat, 15 Aug 2026 04:32:20 +0000 The Australian 300zx Owners Association https://aus300zx.com/index.php?forums/technical.1/ Thu, 06 Aug 2026 23:39:19 +0000 https://aus300zx.com/index.php?threads/tt-tailshaft-cv.339473/ https://aus300zx.com/index.php?threads/tt-tailshaft-cv.339473/ invalid@example.com (Robert5) Robert5 1 Thu, 06 Aug 2026 09:36:32 +0000 https://aus300zx.com/index.php?threads/speedo-only-shows-one-speed.339429/ https://aus300zx.com/index.php?threads/speedo-only-shows-one-speed.339429/ invalid@example.com (ThursdayNight) ThursdayNight
My speedometer currently only shows 90km/hr whilst driving. It'll drop back to 0km/hr when stopped but jumps back when the car starts moving again.

I think it's to do with the earth of the transmission speed sensor (its grounded to a bolt on one of the gearbox supports), mainly as my exhaust used to have a lot of holes in it which caused a bit of a carbon build up underneath the car. I got a full custom headers-back exhaust in May and the speedo stopped working about 2 weeks...

Speedo only shows one speed]]> 2 Wed, 27 May 2026 06:27:10 +0000 https://aus300zx.com/index.php?threads/lower-radiator-support-panel-split.339468/ https://aus300zx.com/index.php?threads/lower-radiator-support-panel-split.339468/ invalid@example.com (angermgnt) angermgnt Today i hoped under mine to find the passenger side has almost split in two. Now that these members are no longer available and getting harder to find. what a people doing (if anything) when it comes to fixing/replacing?

I View attachment 5291 View attachment 5290]]> 3 Sun, 03 May 2026 00:26:47 +0000 https://aus300zx.com/index.php?threads/engine-knock.338610/ https://aus300zx.com/index.php?threads/engine-knock.338610/ invalid@example.com (beaver) beaver
Engine knock]]> 90 Fri, 01 May 2026 12:07:30 +0000 https://aus300zx.com/index.php?threads/how-bad-is-this.339463/ https://aus300zx.com/index.php?threads/how-bad-is-this.339463/ invalid@example.com (93z32tt) 93z32tt
TLDR: Took my Z in for 120k service and an AC leak. Shop pressure washed the engine bay without my consent. Now I have misfires, AC blowing fuses, aftermarket stereo glitching, and clock no longer works. Another local Z shop told me depending on how aggressive they were, this can get worse over...

How bad is this?]]> Fri, 24 Apr 2026 12:41:51 +0000 https://aus300zx.com/index.php?threads/fuel-pressure-dampener-leaking.339443/ https://aus300zx.com/index.php?threads/fuel-pressure-dampener-leaking.339443/ invalid@example.com (Soko99) Soko99
fuel pressure dampener leaking?]]> 6 Sat, 11 Apr 2026 23:27:17 +0000 https://aus300zx.com/index.php?threads/ferrea-valve-issue.339462/ https://aus300zx.com/index.php?threads/ferrea-valve-issue.339462/ invalid@example.com (steve carrier) steve carrier
Ferrea valve issue]]> 2 Sat, 11 Apr 2026 07:42:46 +0000 https://aus300zx.com/index.php?threads/turbos-injectors-unicorns-and-wisdom.339460/ https://aus300zx.com/index.php?threads/turbos-injectors-unicorns-and-wisdom.339460/ invalid@example.com (Bozic_Z32) Bozic_Z32 im making about 320kw in my tt, with gt2860 turbos, 740cc injectors, 21psi, walbro 485 pump.
been on this set up for a while now and wanting to spice things up a bit, looking at installing a flex fuel system, some larger injectors possibly a second pump yada yada, the info im after is turbos, are 3071's going to be a mission to install, can they fit, has anybody ran or currently...

turbos, injectors, unicorns and wisdom]]> 2 Tue, 10 Mar 2026 09:36:30 +0000 https://aus300zx.com/index.php?threads/spot-the-difference.339454/ https://aus300zx.com/index.php?threads/spot-the-difference.339454/ invalid@example.com (JackBing) JackBing The problem for me is... I'm not familiar enough with a stock 300z, so I don't really know what has been done OR if it's actually a good idea.

I have put a series of images below, and I would love if you guys could tell me
1. If it's standard, a replacement or an upgrade
2. Anything else you know about it.


1. K&N Pod Filter + MAF...

Spot the Difference.]]> 2 Tue, 03 Mar 2026 10:35:25 +0000 https://aus300zx.com/index.php?threads/what-aspect-ratio-tyres-do-you-run-on-the-rears.339451/ https://aus300zx.com/index.php?threads/what-aspect-ratio-tyres-do-you-run-on-the-rears.339451/ invalid@example.com (ivan129) ivan129
I've just switched from 245 45 R17 to 255 40 R17 and they are quite a bit smaller in diameter.

Anyone running a 35 or 30?]]> 6 Fri, 27 Feb 2026 06:00:03 +0000 https://aus300zx.com/index.php?threads/wheel-arch-rust-repairs.339442/ https://aus300zx.com/index.php?threads/wheel-arch-rust-repairs.339442/ invalid@example.com (Jeremy) Jeremy
I posted a while ago about getting some advice doing some rust repairs, especially around the battery tray/wheel arch/firewall area on the passenger side.

Sadly the rust under the battery tray/wheel arch is pretty bad and I don’t have a good reference of what “right” looks like in terms of shape/drain holes etc. Yes it is a fairly hidden area and a rough repair would be good enough but I’d like to aim for as close to original as I can.

It may be a long shot, but I’m hoping...

Wheel arch rust repairs]]> 5 Fri, 27 Feb 2026 02:33:48 +0000 https://aus300zx.com/index.php?threads/tps-question.339450/ https://aus300zx.com/index.php?threads/tps-question.339450/ invalid@example.com (Soko99) Soko99 2 Thu, 26 Feb 2026 10:11:25 +0000 https://aus300zx.com/index.php?threads/my-barn-find-z.339448/ https://aus300zx.com/index.php?threads/my-barn-find-z.339448/ invalid@example.com (JackBing) JackBing
My import 1989 300ZX TT is being delivered this afternoon and I am so excited, the first time I saw this car on the auction house website I knew I wanted to be responsible for getting this thing back to its former glory.

It is truly a barn find condition Z, complete with a healthy coating of dirt, moss and a sprinkle of mould.
This is what I do know, someone loved it a lot in its...

My Barn Find Z]]> 8 Sat, 21 Feb 2026 10:00:51 +0000 https://aus300zx.com/index.php?threads/mag-wheel-replacement-for-spare.339434/ https://aus300zx.com/index.php?threads/mag-wheel-replacement-for-spare.339434/ invalid@example.com (ivan129) ivan129 Purpose is to save on weight.
I'm guessing the rim would have to be no wider than 125mm. (about 5") to fit in the wheel well.
And then; there's the challenge of finding a suitable tyre.]]> 10 Fri, 20 Feb 2026 10:44:30 +0000 https://aus300zx.com/index.php?threads/carcraze-100k-timing-kit.339445/ https://aus300zx.com/index.php?threads/carcraze-100k-timing-kit.339445/ invalid@example.com (Loki) Loki https://www.carcraze.com.au/genuine-nissan-300zx-z32-vg30-timing-belt-kit-valu

More concerned about mine being a 95 so I believe some seals are different and don't know if this kit have the right ones. Aswell looking for...

Carcraze 100k timing kit?]]> 12 Sat, 14 Feb 2026 03:17:30 +0000 https://aus300zx.com/index.php?threads/vic-mechanic-brake-discs-pads.339444/ https://aus300zx.com/index.php?threads/vic-mechanic-brake-discs-pads.339444/ invalid@example.com (marsbar) marsbar 2 Wed, 31 Dec 2025 23:33:16 +0000 https://aus300zx.com/index.php?threads/act-mechanic.339433/ https://aus300zx.com/index.php?threads/act-mechanic.339433/ invalid@example.com (Bruce Clark) Bruce Clark
ACT Mechanic]]> 2 Mon, 08 Dec 2025 12:01:08 +0000 https://aus300zx.com/index.php?threads/power-light-blinking-16-times-when-ignition-is-turned-on.339430/ https://aus300zx.com/index.php?threads/power-light-blinking-16-times-when-ignition-is-turned-on.339430/ invalid@example.com (sleepyzx) sleepyzx
From digging through old threads, I gathered that it's indicating some sort of problem with an auto gearbox. Except my car has had a manual conversion done. Am I understanding correctly that it's probably complaining about the auto box missing, and all I need to do to get rid of it is to pull out the transmission control module?

Or is that...

"Power" light blinking 16 times when ignition is turned on]]> 3 Sat, 01 Nov 2025 10:32:26 +0000 https://aus300zx.com/index.php?threads/replacement-intercooler-hoses.339419/ https://aus300zx.com/index.php?threads/replacement-intercooler-hoses.339419/ invalid@example.com (Dayle Veitch) Dayle Veitch Thx.]]> 3 Fri, 24 Oct 2025 23:38:13 +0000 https://aus300zx.com/index.php?threads/cranks-but-wont-start-nissan-300zx-z32-1990.339416/ https://aus300zx.com/index.php?threads/cranks-but-wont-start-nissan-300zx-z32-1990.339416/ invalid@example.com (Don33) Don33

After that happened, I tried to figure out the issue. I checked the crank angle sensor. When I took it out and held it in my hand turning little bit , I heard a clicking sound. I also checked the PTU. I had already ordered a replacement PTU and swapped it in, but the Series 2 PTU I installed...

cranks but wont start Nissan 300zx z32 1990]]> 1