I bought my 95 3000gt in orlando. I live in miami. On the drive here the car did around 22-23 mpg all highway which isnt bad. Since then I have only driven it city and it gets like 11-12 mpg. Is this normal? Im new to 3000gt's is there anything that I can do to improve the gas mileage? I only use premium like the manufacturer suggests.
By the way I dont know if it helps, but it is an SL with a TT motor swap
You may have a bad 02 sensor. Do you have anything to log with. What do your fuel trims look like?
Interesting and in for any suggestions. Mine has never gotten the mileage I hear others talk about but lately it's dropped to the 12-13 range in city. Still gets 20 or better on the highway. Fuel trims good. O2's new. AFRS look good on the wb. No fuel leaks that I can find.
Most powerful 13T car on the planet @501awhp, PTE 780CC injectors, AFPR, E85, Greddy Profec B, 3.5" Granatelli MAF, MAFT, Apexi ITC, SS Headers and O2 housings, 3SX downpipe, CRX racing FMIC, Dejon intake pipes, Ground Controls, Maximal adjustable rear control arms, Maximal TC Brace, Poly front and rear mounts, Vacuum Reduction, EGR block off plate, Hot Wired Walbro 255 and inline Walbro 255, Southbend stage 3 clutch, Slotted and vented rotors, SAFCII, Turbo XS BOV, 3SX FP hotwire, Seatle Short Shifter, Jackhammer timing gears: Best 1/4 mile 12.33 at 114.9 mph 1.79 60ft.
Well I just did a boost leak test and found out that my BOV leaks pretty bad. Would that cause a decrease in mpg. I also turned the idle RPM's down to around 800-900. The PO had it up to 1500 at idle. That should help slightly. I am also having trouble finding a shop in south florida that has the right computer to diagnose a OBDI system. It seems that all they all only have OBDII scan computers. I do have a narrow band AFR gauge (I know its not much accurate compared to a wideband) it is lean at idle and within the normal range while driving and at cruise. It never goes to the rich side of the gauge, even under boost. I will keep posting as I make adjustments. Hope I can find the problem soon!
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