Gas Pedal Delay

bplaya

Started noticing this problem this summer. I have a Nismo

tjlazer

This has been happening to me too. Today it happened a lot. Was doing some testing. Oil temps were at 220 to 225 and it happened at every red light. Went to the grocery and when I got back on the road, temps were 180ish and it was gone for a while....

I have to have it way above 3000 rpms to combat this symptom. There were a few times it was a little hairy as I needed the power and it was not there. Could definitely be a safety issue.

I do have HAI's installed too. Hmmmm. Wonder if its hear soak and hi oil temps that are causing this. Since it happens when you are at a dead stop for a few minutes.

edit: outside temps were 80.

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2009 370Z Monterey Blue,Nismo Conversion,RE-11's, K&N Typhoon intakes,Blue Kickplates,Homelink,FI 18" CBE,ERZ HFCs,Hotchkis sways, Swift Spec-R, EVO-R Highwing, UPREV

ChrisSlicks

Sounds like heat soak is affecting a sensor (which would make it worse when stationary), doesn't sound like oil temps are a factor.

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tjlazer

Did more testing today on my way in to work. Outside temps were 58. Oil temps were just over 180 degrees, not once did the gas pedal delay happen. Tested it on many red lights... I think it's definately heat related.

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2009 370Z Monterey Blue,Nismo Conversion,RE-11's, K&N Typhoon intakes,Blue Kickplates,Homelink,FI 18" CBE,ERZ HFCs,Hotchkis sways, Swift Spec-R, EVO-R Highwing, UPREV

DIGItonium

I wonder if some sensor(s) is getting heatsoaked and giving false readings. IIRC, I read about MAF sensors losing accuracy when it gets too hot. How about cam and crank sensors? It doesn't make sense because our motors idle smoothly. [shrugs]

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m4a1mustang

That doesn't make much sense in my case, though, where I experienced the problem even while the engine was (relatively) cold. Same thing with Iced Z.

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DIGItonium

I've got the twins now, but I'm not sure what goes into the GTM Uprev flash. Throttle response feels the same, and the lag or loss of power is still noticeable if I punch it in 1st or 2nd from a roll at low revs. In regards to the throttle map, I didn't hear anything about it so I guess it's still the same.

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cossie1600

Drive by wire+emission control=laggy

ZForce

More like: drive by wire + VVEL+ heat soak = laggy

gmr19

If it makes anyone feel better, my 2004 M3 has the same throttle response lag when you tap it real fast. Seems to be mainly a DBW issue.

ryan370zpower

any updates on this issue? my car has this issue so extremely bad... I almost got killed today trying to make a left turn at a traffic light where I barely moved and on-coming traffic almost tboned my *** into oblivion...

IcedZ

That's the reason I got rid of mine. It was a major safety concern. Scared the hell out of me twice.

I got a 2011 Juke, and I thought that alleviated my problem; but I feel like it does something similar sometimes. It's an automatic though, so it feels different. And it's a small turbo engine.

DIGItonium

Yea it stinks even with turbos. Some owners resorted to UpRev tune which alleviates this issue, and others used the Sprint Booster. I have the UpRev tune, but it's only to support forced induction. Anything related to the throttles is kept stock.

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wstar

Sprint Booster doesn't really fix anything. It's more of a psychology fix: it changes the gas pedal input sensor to react as if you'd pushed the pedal down further before you've actually done so. You could get the same effect by just changing your pedal habits.

Smooth Throttle for UpRev <- this has my throttle map and the stock one to compare to, and various other bits of data on the subject. There are definitely aspects of this problem that can't be solved through the throttle map either, but this helps (and smooths out the response curve for predictability rather than mucking it up and making it jerky).

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ryan370zpower

Interesting enough, a buddy was selling his sprint booster from his already sold 370z. So I inquired into it and letting him hook it into my car so I can try, and WOW what a difference. I definently thought this thing was a scam, but its working great so far. I guess my issue though is that this seems to be like a bandaid on the problem. Im still very anxious to know if an osiris tuner can fix this issue 100%. Im willing to pay for the tune JUST to fix this issue with my car if the tuner can guarentee 100% it can be done. I just want it fixed otherwise im gonna haveto sell the Z. I cant be worried about driving around town and dying at traffic lights.