Howdy
So I'm having a problem with my 03 NA XR6, I feel as if the car is running fairly rich and it has been having problems where the car will lose power on the highway or drop revs and feels sluggish to drive, I've replaced a lot of things including;
plugs - double platinum autolites
new fuel filter
new air filter
new oil filter
new o2 sensor
all new fluids and coolant
new oil full synthethic hpr 10w-50 penrite
2/5" m/s lukey exhaust
pacemaker extractors
mace cold air intake
new belts
I've driven the car hard and very soft for a full tank I'm still averaging 380-390kms to a 68 litre tank, is this average fuel econony? Can I be getting much more? Is there something I've missed? I'm cleaning out the TB today and coil packs are the next guess although my mechanic seemed to think my plugs and coils are fine..
Cheers.