Steezy New Member 1 Member For: 7y 1m 2d Gender: Male Location: Tasmania m8 Posted 26/02/17 06:15 AM Share Posted 26/02/17 06:15 AM 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. Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,238 Member For: 15y 11m 18d Gender: Male Location: Melbourne Posted 26/02/17 06:25 AM Share Posted 26/02/17 06:25 AM You should be able to get 600ish km on the highway out of a tank. 400-450km is reasonable out of a runabout car that only goes to the shops. I would suggest to clean up the intake system including the TB. Could also be a vacuum leak - check for air escaping from the gap between the two halves of the intake manifold. Make sure the catalytic converter has not collapsed and the oxygen sensor is in reasonable condition, too. Link to comment Share on other sites More sharing options...
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