Well this is sad. 50/50 highway/suburb driving with a 4 cylinder and im getting 15 mpg. Not driven too hard, but not driven for optimum efficiency either. I rarely take it up to redline. Engine seems normal, don't notice any leaks/gasoline smell, etc. while im driving or stopped. It gets a little bit "raspy" when i increase the rpms but i think (hope) this is normal. Im using regular if that matters. Is this normal?
15 mpg? wtf?
NissanSupraGTR
21 - 32 of 32 Posts
if you are replacing 02 sensors for gas mileage, just a tip, the after-cat (post-cat) 02 sensors dont affect gas mileage, its the ones before the cat that do it...not sure how many these cars even have...But thats just a general rule of thumb Ive learned.
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29 Posts
perform a basic tune-up, replace filters, and reset ecu. btw why are you getting a 3" exhaust for your n/a ka24de?
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2,204 Posts
^ Ka's have enough displacement to make use of a 3'' exhaust w/o having forced induction.
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47 Posts
alright, i dont know what happened but im back to gettin shitty mileage. less than 15 mpg now. I figure its the exhuast so im gonna replace that and the cat and see what that does. If that doesnt work, o2 sensor. And if that doesn't work...i guess i got to get a pro to take a look 
Btw, how do you reset the ecu?
Btw, how do you reset the ecu?this happened to me, it ended up being the PCV VALVE,they usually get clogged overtime and waste gas, but if you change it like 3$ but hard as FxxK to change, but yes, i was driving like 16 mpg, and i changed it and now im running 28-32 mpg CITY.
i'd change this first then spending more than 3$.....
pretty sure its the prob..
i'd change this first then spending more than 3$.....
pretty sure its the prob..
Joined
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47 Posts
already did the pcv valve - turns out i was calculating the mileage a bit wrong - thought tank was 16 gallons till empty, but there's actually a few gallons in reserve. So i get around 20 mpg, which is just fine by me
21 - 32 of 32 Posts
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