Fuel Management

[93Skyline]

Hey guys,

I'm a new member and the proud owner of a 1993 R33 gtst. I've not had the car long and it's only got minor modifications to it, a cat back exhaust and a pod filter. As far as I know it's in need of a tune up and was wondering what kind of benefits i could expect and how substantial they would be. Furthermore, if you know of a good company in the brisbane/ipswich metro area that deals with this sort of thing then let me know.

as you can see i'm a complete newbie

cheers

[JimX]

You can't tune it, unless you've got a programmable ECU like PowerFC, or an intercetpor like S-AFC. If you are just wanting to give it a normal service type "tune", you can do a few things. These aren't in order of importance, but roughly easiest to hardest.

Firstly, clean the air flow meter with some electrical contact cleaner (buy from Jaycar, ask for exactly that and they'll know what it is). There are threads in here on how to do it properly, not that it's difficult.

Secondly, change the plugs for some good quality platinum or iridiums. There are probably already platinums in there, but if you change them now you'll know how many km they've done and can not worry about them for awhile.

Thirdly, test the O2 sensor which affects your fuel economy. You can either do it (relatively) quickly with it in place, or remove it and test it on a workbench (the latter is a more accurate testing method). For details on that, read this article.

Fourthly, clean your injectors. The cheap way is just via the bottled stuff from an auto parts shop, which may or may not help. The expensive/proper way is to get them removed and ultrasonically cleaned, which usually costs around $200 or more, depending on if you get the mechanic to remove the injectors for you or you do it yourself.