Novice seeking advice

TomZ32

Club Member
Hi all, returning to the club after a while out and the Z in storage for 6 years!
It’s a 1992 300ZX Twin Turbo manual 2 + 2 Targa
I’m having an issue with starting and was hoping for some help please. Car starts perfectly from cold but once upto temperature will not re-start when turned off. I leave it overnight and the same thing happens. I have code read it but keep getting 55 which I believe is no fault found.
Any advice greatly received, looking forward to getting it back out there!
Thanks, Tom.
 

jonbills

Membership Secretary
Staff member
Site Administrator
what's it like trying to start warm?
does it nearly start? a few coughs and splutters or nothing at all?
 

TomZ32

Club Member
Thanks for the reply. It turns over but won’t fire. I can smell fuel as it’s trying to go.
 

Rob Gaskin

Treasurer
Staff member
Site Administrator
I am a complete novice myself re later Z technology. However I assume there is a temp sensor contributing to the control of fuel amount. Could it just be that this isn't working and the ecu thinks the car is cold and supplying an overich mixture? Wild guess.
 

TomZ32

Club Member
Spark plugs are sparking fine and have been replaced. I’m sure it must be a sensor Rob, question is which 1? :) Thanks again for the replies guys
 

jonbills

Membership Secretary
Staff member
Site Administrator
I think it's also possible that there's an air leak and there's not enough enrichment when warm to get over it.
wb02 would help determine whether it is too rich or too lean. state of the sparkplugs after a failed warm start would also help diagnose.
 
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