I can't completely blame this problem on DBW because I never complained about lag issues with the 350Z. Plus, my dad's '05 Xterra and my '08 Accord doesn't lag either regardless of temperature.

To put it it this way, the Accord DBW does not lag driving back in forth in and out of town on a hot summer day. The 370Z starts having issues passing other vehicles while driving out of town. Passengers describe it as me letting off the throttle while passing.

You would think downshifting to 3rd and gradually pressing the throttle from 20%-70% would mean progressive power, but it's not the case with the 370Z. During normal operation, it will progressively open the throttle. When "hot" it feels like power progresses between 20-40%, dead 40%-50%, decreased and dead 50% and beyond (as if throttle is being let off). It's an exaggeration, but any of you get my drift?

This is my 3rd Z and I HAVE tried going to the dealer. They were unwilling / unable to help. I've even spoken to the shop manager. i'm going to call this morning and see if they will do a ride-along with me or something. I had an '07 X-terra, it was fine. My girlfriends accord is fine.

Hey man it sounds like ur fuel pump overheating and lagging not enough lube to move freely when its expanded by the temp or a design flaw to fix this u need a real tech. Am not one of them am just a guy who hears stories. Or get an aftermarket pump but think how much gas ur gonna save on a broken pump Lol :D

I unplugged the Bosch Yaw sensor last night, and my drive in this morning felt awesome! But, it was the coolest morning we've had all season, upper 40's. I'll find out after work today if it helps. Also, I took your advice digi, and scheduled an appointment for a ride-along with a tech. That's not until 11/1 though.

that describes it a bit better. sounds like you may have a dead spot in your gas pedal, i dont know. That definitely describes a problem, especially if passengers notice it. It also describes something Ive never felt in my car, regardless of the temp. all I can suggest at this point is to go to a dealer and ask to test drive another one, tell them what your experiencing, and take it from there. If the other Z doesnt do it, they can have something to compare your with.

My moms TSX is horrible with the lag, as are most DBW cars I get in my shop.

Thanks!

Really? Man I'm about to pick up an '05 TSX this weekend, if all goes well. It can't be any different than the '08 Accord, right? [shrugs]

I have an appointment to meet up with a tech tomorrow after work. Unfortunately, tomorrow is also the coolest day of the week because of a cold front bringing some precipitation tonight. Hopefully it'll be a dry one.

The fuel pump is an interesting thought... who knows. [sigh]

She has a '10 2.4 TSX. Its response SUCKS really bad. My fiancee has an 08 SI with DBW, response SUCKS. I had an 06 RSX-S, response was perfect, especially with the mods I had, but even stock, the response was very nice. The Z, IMO, is just as good as the RSX, many other cable cars. I test just about every DBW car I get in my shop and I can honestly say they suck, plain and simple.

And yeah, the 08 Accord is the same as the TSX.

I agree with everything you said. I've had my hands on all those cars mentioned above. Except my 370 has this same response as digi's.

Off topic, have you driven a 2011 mustang? I've heard the response is as quick as the RSX's (cable-I use to own one) and I'm lookin for a car that has that same "cable" feel/response like I'm use to from my 350z and RSX.

Unplugging Bosch Yaw sensor didn't resolve the issue either. I have a vid if desired, but it's the same as the others. =\

The resistance of the pedal is what I think makes a cable feel better. DBW is just to... flimsy feeling. The thing to remember about the Z is it doesn't use the throttle bodies, per se, like a normal DBW, the cams are doing all the work in the most basic of terms. This is why, I guess, the 370z is so much faster, response-wise, than our average DBW. Well my car anyway, haha!

:mad: damn bro that's weak, its really odd that some 370's have this problem and others don't, hope you have lucky with tech ride along. Thinking more people with this problem probably should contact NNA, as it seems like it might be a problem where a recall might need to be implemented.

this technology used in these motors is very new, and you know how that goes with new vehicles, just ask GM...

I skimmed through the pages.. Anyone try an upgraded battery like an Optima Yellow top?

I don't see how that would help... Starting is no problem, and I maintain a high voltage during operation.