UPDATE: some of you may remember me...
I asked about buying a 2008 g37 coupe sport automatic with 78k miles and lightly modded. Private seller asking 10k. Nothing mechanical was upgraded. Just some k&m coilovers and eibach pro alignment kit. I was scheduled to see the car last friday (9/8/17).
I had an import shop do a "pre purchase" inspection for $50. I spoke with the mechanic personally and he said the car runs great, no leaks, brand new tires, transmission fluid looks recently done, back brake pads 50%, front 75%, all suspension upgrades seem to be done correctly. THE BAD--- needs air filters, battery, hood struts. Also said that, based on the milage, the serpentine belt should be replaced eventually.
He said that in his experience, at around 70k miles, g37s have exhaust valve, gasket, and plug seal leaks... But this car so far had none.
I bought the car.
We agreed to $9,300. Drove it 200 miles home, no problems. Ive added 100 city miles since and still good.
Now for some concerns and questions...
Did i get a good deal?
The car idles at 1000 rpm (sometimes bouncing around give or take). Ive read that normal is about 700... So wtf?
Seller told me to reset the ecu to "learn", my driving habits. What??
What does reseting the ecu do? When should i do it?
Do dealerships have software upgrades that benefit my car in any way?
I want to reduce weight and/or increase horsepower. How to?? Are the stock wheels concidered heavy or light weight?
Does the dealership offer a tune for increased horsepower?
Is a super charger a good idea? Or a turbo? Can i use either of these reliably with the stock parts and components?
Is there any where to buy new or used turbos/superchargers or other desirable aftermarket parts for cheaper?
And last but not least... I accidentally filled up with 87. I have a full tank. Am i good? Or will this fuck my engine? I added a walmart octane booster and topped off with 91...
Help with all the above please.
Thank you.