r33 running rich, what needs to be looked at?

[sangra93]

my 93 r33 gtst is running rich. just got new spark plugs put in two weeks ago but didnt make a huge difference. my car is only doing about 315km tops on a full tank. that being said only if im not going into +boost. i shift at 2500 and drive the car well. any suggestions?

[support@feastauto]

Could be a number of things. Water temp sensor for ECU, fuel pressure regulator, O2 sensor.

[ToroGTS]

Also vacuum leaks tend to result in an overly rich condition, easy to have one on the intercooler piping/injector seals/ pcv lines/ ect.

[sangra93]

any tips on how to do a vacum leak test? how many kms are your guys cars doing on a full tank?

[support@feastauto]

I couldnt see you getting much more then 400 on that motor. Service shop would have a vacuum smoke tester & there are DIY's on the web how to make your own.