misfire!

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November 4, 201015 yr

Im having really trouble with my 300zx..only brought it 2 weeks ago..firstly gearbox has decided to play up..

im now having another prob... i had it running for a few mins ats its not been used for a day or two and its not misfiring..it ticksover ok but is still missing. ..this misfire just randomly started and not sure why??

The car is very low on fuel could this be anything to do with it?

Matt

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November 4, 201015 yr

it could be low on fuel . stick a few quids worth in . if this dont solve it give the injector connectors a wiggle . all zeds suffer with dodgy engine bay connections . you may have disturbed something .

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Tyre size recommendations

Cheers all,
I did consider a 225/45/17 but thought that it might be too much chunk on the side wall. But so many more options!
Looking at the calculator, going from a 235/40 to a 225/45 is about 7.5mm more sidewall which isn’t much. Loads more choice too. Think I’ll go for that, thanks for the help

By RobHowl · 30 minutes ago30 min
Tyre size recommendations

Use this site or similar to get the rolling circumference difference when you change wheel diameter and tyre profiles.
It will tell you how much the speedo will over or under read, and the difference in overall diameter to work out if they will rub anywhere.
https://tiresize.com/tyre-size-calculator/

By craig · 19 hours ago19 hr
Simply Japanese at Beaulieu 19th July 2026

22 hours ago, nickz32 said:If I’ve built and installed my engine by then (which I bloody hope I have!) I’ll be there
Fingers crossed for you Nick!!

By RichardS · 20 hours ago20 hr
My daughter calls it Toothless the Dragon: My ‘95 TT Z

Happy to say work on my engine block is now finished! Billet main caps were found to be up to 4 thou out of round. This time they have been machined using the ARP’s that will be used during assembly (unlike last time by EPR!)

Cylinders were rebored to suit my 88mm CP pistons and cross hatching angle, depth and surface finish all set up for the Total Seal gapless piston ring pack I have chosen to use. I think I’ll be the first person on the UK to use Total Seal’s gapless piston rings on a VG30, so I’m looking forward to seeing if the live up to the hype

By nickz32 · 23 hours ago23 hr
Tyre size recommendations

Might be stating the obvious (to some) but something I didn't realise until I started trying to pick tyres for aftermarket wheels is that the profile figure - e.g. 40 - is 40% of the width.
So for a 255/40/17 tyre - diameter is 255mm, profile / side wall is 102mm (40% of 255), and radius is 17inches.
Learning this made it all make a lot more sense to me. I also have this graphic to refer to. Can't recall where I found it but it's now saved on my desktop!

I also wanted a chunky looking tyre with a solid side wall and after going 245(F) / 265 (R) , have since switched back to 235(F) / 255 (R) as I found the handling was noticeable more boggy and I use the car for fast road and track use. For ref, these tyres are on 18" BBS LMs.

By sumshiftyguy · Yesterday at 08:581 day

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Simply Japanese at Beaulieu 19th July 2026

My daughter calls it Toothless the Dragon: My ‘95 TT Z

Tyre size recommendations

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