Hello every1
I am new her

Was wondering if u can help?!

Ever since I have gotten my skyline r33 gts25t serviced and tuned it seems to be running rich - (lots of black sotty stuff in exhaust and prevalent smell of unburned fuel after turning car off).

Before service and tune was getting 480 to 530ks from 65 litre tank- now getting about 380ks per tank driving same way. Is this normal? Is this because running rich? If so what can be done to fix problem???

p.s.

I have no mods except for 3.5 inch exhaust from cat back and panel BMC filter which have not changed since i bought car - 95 model

1. Weak plugs
2. weak coil pack
3. Air Flow meter not metering properly and needs a clean


Start with those.