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.
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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