After the dealer replacing the alternator and a coil my G shakes a little during idling. How come my G shoots all the way up to like 2200 RPM at startup on a regular start, not a cold start then takes a few seconds to go back down. Usually it would do about 1500 RPM at the most and go back down to 800-900 RPM real quick. Now I have to back to the dealer later.

 

how long since the dealer, miles wise, maybe just ecu relearning, after i reset ecu, my rpms jump all over the place for the first couple days

 

The G's always blip the throttle, but it seems yours takes a tad bit longer to go back down to normal idle on a hot start. Has it been really hot over there lately?

 

Illmatic were u on the whitestone expressway 2day saw a black g tints and hidz done..it was around 830

 

hmm it is very unfortunate that some of us still think that G, in other word, the infiniti is a reliable auto maker company

 

You and the OP seem to have a lot of problems with your G37's. That's not something I wish to happen to anyone but don't think that Infiniti is any less reliable than Honda, Toyota, Ford, GM or any other brand. They all have there ups and downs, some just make really boring ugly cars.