New G37 Break-in, ECU reset and more..

[paugreeny83]

Hi all,

So I recently took ownership of a 2012 G37 Manual Sport Convertible, which I love. A couple of things I want to ask you experienced owners:

After 300 miles, I found the fabled dings on the roof panel from a faulty folding hard-top mechanism that needed repairing, and the hood hydralics recalibrating. This week it went back to the dealer for repair, and I was given a G37 Sedan Auto, with 11k on the clock. Needless to say I didn't feel too concered about putting the hammer down and seeing what it had, and oh my, it feels soo much more powerful and responsive in every gear compared to mine. Obviously I haven't hammered mine yet, but I have given it the odd toe through the first few gears upto 5,000rpm, and it feels so much less powerful.

I know the convertible is slightly heavier, and it's a manual Vs an Auto, but it's the same engine, and the only other reason for this power hike is the fact that the Sedan is properly broken in. Thoughts?

The other thing is this ECU reset. I've read lot's, and the concensus seems to be that the soft reset using the pedals works. Will I see such an increase in power upon the reset that it feels like this loaned Sedan? When should I consider the engine worn in enough to perform the reset then try pushing the revs? Some forums have said 600 miles, whereas the book says 1,200.

Thanks in advance,

Paul.

[joe603]

Sorry to hear about the dings, sucks on a new car!

As for break in, do some searching...a few topics cover this. I would recommend you keep it under 4k rpm until 1200 miles. Also don't use the cruise control for long periods of time...you don't want to keep the engine at the same RPM for long periods during break in.

When you hit 1200 miles, I'd change the oil. The car will wake up after 2k miles or so.

[paugreeny83]

Thanks for the reply Joe. I will do as suggseted.

What do you think about the ECU reset? Would you do this at the 1,200 mile mark too?

[joe603]

I'd do it once...probably don't need it, but it can't hurt. The issue may be regular gas used at the dealership. Next time you fill up, do the reset.

[Fezzik]

Also for the difference in the feel, the auto has 7 gears and the ratios are higher in the first couple of gears so you get that faster acceration. but the vert is a bit heavier.