I have a 2010 g37x coupe with 35,000 miles and I feel like the car isn't as responsive as it should be when you step on the gas. I've driven other Hondas and Toyotas and they seem to be moving a lot quicker. I also average about 14mpg. Anyone else have this problem?

 

I forgot to mention I already did the reset and throttle body clean and it didn't help. I ordered Stillen grounding kit and hopefully that helps. Any other suggestions?

 

Have you checked your spark plugs? That will give you crap mpg if its not working properly and would also be unresponsive. Just a thought. I am getting around 23 mpg avg. mixed driving so you definitely have an issue or you drive like a psycho. LoL

 

it helps a tiny bit (might be in my head though)

the a/t throttle lag sux in these cars (many threads on this)

 

Did you receive the latest updates for the 7 speed auto? There are two I believe I just got my last one it seemed to work a bit but there still times the lag is there. Ask your dealer if they were performed

 

when I used regular engine oil car felt pretty clunky, now with mobile 1 full synthetic it feels bit more torque on the low end and engine feels happy.

 

https://www.myg37.com/forums/g37-sed...reprogram.html

 

Thank you guys for all your feedback. I already have the latest updates, use synthetic oil, FI catback exhaust, and R2C intake. I'm going to replace my spark plugs next since that might be the issue here. Hopefully the dealer doesn't charge me an arm and a leg. lol

 

It might sound silly but check your tires. My car felt really sluggish and less grippy and I'm at 34,000 miles. They were pretty worn out and a new set has my car feeling just as quick and responsive as before

 

I don't think it's my tires since I changed them not even a year ago. Hopefully it's not my transmission going bad. If anyone else has any other ideas I would greatly appreciate it.

 

Any of your brakes or parking brake dragging?

 

No, never had any issues with those. Once I get my spark plugs replaced and Stillen grounding kit installed. I'll update you guys.

 

Are you using the correct OCTANE Fuel ? 93 for me.

 

Okay, so I ordered the spark plugs and went to 2 different shops. They don't think it's my spark plugs that has problems. Yes, I used 93 octane. I'm averaging 13.2 mpg and still not responsive. Not exactly sure where to go now