Ahh the Texas heat and delay of power.
 

Seems like as soon as it gets over 90* I get a nasty hesitation in throttle response at very low rpm. Anyone relate? (yes i know hot air makes for slower car) I live in dallas and we always have high humidity too

I haven't noticed that at all in mine, TBH.

Possibly the ECU pulling timing when IAT is above, IIRC, 85 F.

I live in Dallas and haven't had this issue . 2011 sport model

hummm... ive driven my 09 numerous times in 90F+.

no issue with mine. there is heatsoak while at a light so the power delivery is obviously
less vs a cool day, but no hesitation.

no issue here, and I live in San Antonio

We've had 90 degree weather for the past few weeks, but I have not noticed any hesitation.

My Z will spin the tires at the slightest provocation leaving work when it's cold, I mean it's like a different car when it gets warm. Not bad mind you, but I think all the cars I've ever owned ran peppier when first cranked.

When I lived in Texas, I noticed a loss of power in the summer time (90F of above). Also when I had my car tuned at Uprev, they told me that you start losing HP once your oil temp starts getting over 220... not sure if there is any truth behind that.

I also live in Texas and I think I'm experiencing the same thing op. My car feels perfectly normal in the high RPM's but the punch off the line is lacking for sure.


Sent from my iPad using Tapatalk

During my last Texas summer, I would experience loss of power and my car running sluggish when temps reached above 90F. My tuner made some slight adjustments and corrected the issues.

Ok let me clear things up a bit, if you had and up rev tune done by a real tuner, means he adjusted ur a/f ratio on a/f targets and timing and so on, you will not have this delay. If you just installed a rom by ur self w/o a tuner person correction, you will have that stock delay(if u never adjusted it). If you never had the tune you will have that low rpm delay. I personally noticed that an up rev rom (back to stock) has more lag than the original nissan programming(stock) this due to a/f ratio is 14.7 till ~3k rpm also at WOT it hits 11.7 a/f ratio cuz if u put wrong fuel it wont do too much engine damage.

Mine does it too.

I reset my ecu a few dsys ago to clear the long term fuel trims and this happened to me testing a 0-60 run where my 60 ft was 2.7 instead of much quicker. I pushed it to mid throttle from dead stop and big bog. I have never experienced this before ftom line in heat. Im hoping its because of the reser of ecu and will get back to normal after it lears some more driving

i noticed it too.

I live in Vegas and have been suffering with this issue every summer. I get a massive delay in throttle response at low RPMs when in hot conditions. First gear, foot to the ground and no power until 3k rpm and then it bursts into life - feels like really bad turbo lag. I have the Stillen Gen3 intakes and have wrapped them with gold tape heat insulation to try and keep the IAF sensor temps down. It seems to have helped, but has not cured the problem.

I get the same thing, but its only when I don't give the car a little gas/revs before I start releasing the clutch. If I give it a little gas it will not have that issue even if the intake temp and oil temps are high. If I remember right it is the result of lowering emissions by nissan for daily drivers, maybe someone remembers the post/thread, this issue isn't the first time it's been discussed.

http://www.the370z.com/engine-drivet...ml#post2706408

There's the post.

It's not just the delay, but it's quite interesting. I had this when my car was stock. With forced induction I have trouble building up boost as if the throttle is opening up at a slower or limited. I can floor it in 2nd past 4k RPM and barely get 5 PSI, whereas I normally get at least 5 PSI at half throttle when "colder."

Warranty Issue?
 

Okay, a lot of us have noticed it, but not everyone. I did not have it in my previous Z, but seem to notice it in the new one. The previous 2012, wow! You hit it and it blast off, no so now. Do you think the technicians can tune this out?
Any one tried with the dealership?
Chuck

No issues with mine. I'm by Austin

It has been an ongoing discussion since 2009. An oil cooler helps. My vented hood works wonders as well. So my issue isn't as frequent.

I had the exact same issue come up this summer. Foot down hard on the gas in 1st and nothing until about 3-4K rpm, and even then it feels like barely 10 hp. very frustrating and honestly it felt unsafe to drive in traffic like that

Anyways I just put on the new triple pass radiator from CSF and a 34 row oil cooler from fast intentions. Has not happened since then. Oil temps dropped 30-40*F and coolant dropped 40-50*F

huge difference in performance!

Yup, mine is boggy in 1st and 2nd gear when temps get above 105*, but it does not do it all the time. The car performs well in 3rd and above even with temps are over 115*. I have an FI 34 row oil cooler and their twin turbo but even with tt I only saw oil temps of 235* in rush hour traffic in Phoenix and it was a 118*. When the car came up to speed, 65mph the temps would fall to 220*. I think a vented hood and a CFS triple pass radiator are in order by next summer.

Also I don't know if it worth messing with the tune when you are talking extreme conditions for a short time unless you are tracking, then you need to do anything you can to get cooling.

if you have aftermarket cold air intakes, get some house sarking foil material and attach a large sheet underneath each of the pipes from the throttle body all the way to the radiator. Cable tie each corner to something sturdy and keep the sarking material away from the piping as much as possible. The larger the air gap, the better. Shiny side facing the ground.

Adhesive foil wraps do jack all. Even with the layer of fibreglass underneath, it doesnt deliver much bang for buck.

This won't work for stock intakes or short ram intakes due to space constraints and location of air intake for the latter.

Digi - have a read of my throttle lag thread. I have new developments which you might be interested in. Hope you have a multimeter handy!