Gas Pedal Delay

OMGiGOTaZ

It's not your old school RWD car that you slam the gas when it's wet out and you do a 180 or Go Fishtailing.

The car has some features which, if you drive like an then the car will interrupt your program until it feels stable

I have learned to turn VDC off when it isn't raining

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all you gotta do is...

DIGItonium

No one really knows, but it pretty much explains why some people have it while others didn't. I experienced all sorts of weird problems and thought I was going crazy. It has been over 2 weeks and I'm still enjoying the car. Last night I downshifted to 2nd at 35-40mph, and the car hauled arse. I didn't even completely floor it. VDC was going crazy, but the car got moving real fast.

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ZForce

^Very interesting. You make it sound so simple, but for the non technical mechanical members (like me) what you did is foreign language.

Any pic's would be appreciated, as I would be interested in trying this once the brake switches get replaced.

ZForce

Update: they are replacing both brake switches on both cars. Good thing, might as well, will take any guess work out of it as to which one is causing the throttle lag.

Digi... IIR is the brake switch you had replaced the one that is called the XXXX ? Or is the one that triggers the brake light at the rear of the car?

DIGItonium

I don't remember because they forgot the hand me the paper work with the brake switch change. If you look at the pics from my earlier post, you can see which switch was the culprit.

Ambient temps were close to 60F yesterday, and I had the oil temps close to 200F. So far so good. I can still feel the push in 6th while cruising (versus no feeling, but just a louder exhaust note. It still gets glitchy once in awhile, but VDC is definitely pretty sensitive.

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ZForce

Ok..well both switches are being replaced and here are your pics. Looks like it was the one on the right, the one with the black casing. I will check with dealer to see which switch it is. My guess its the one the sends a signal to the ecu to kill the throttle becacuse the brake is "ON".

Here is your post from other thread.

I have a serious engine problem

asdfsammich

Nice news. It explains a whole lot. Especially the inconsistency of how bad some have lag vs others.

Design lag, e.g. drive-by-wire, VDC ON, VDC that can't be turned off, mashing the pedal too fast, conservative throttle maps etc; those explanations never made sense to me when I occasionally got 2 second lag, with good oil temps, smooth throttle engagement and no heat soak. I'm definitely going to see if I can get these brake controls replaced.




Tapatalk & such etc

asdfsammich

I didn't read all the way up so you may have already mentioned.

But how did you present the issue to the dealer and get them to do the replace so easily?


Tapatalk & such etc

ZForce

I started out with explaining that the throttle lag had been an issue since day one - March, 2009. The service manager and I have previously had discussions over the years on the issue and how I was waiting for UpRev to crack the Varible Valve on these Z's. So he has been aware of my concerns for sometime. Last week I presented the fact that a member here tested it with some cardboard and masking tape and the car screamed with NO throttle lag and is on week three with no issues. I also threw out that the same issue is occuring on the Altima's. With my rapport with the service manager and he knows how I take care of the car, he took me on my word to try it.

It might not be as easy with a dealership/ service manager that you have not dealt with much. A little back graound with my dealership - purchased 2 each 350Z's and 2 each 370Z's since 2005 and have extended warranties on the 370Z's.

I also bring in bagels and cream cheese occasionally for the service writers and technicians in the shop.

G/L

ZForce

Kenny ^ thanks bro for the 411 update. So it's the same as in digi's photo on the link I posted above. The one on the right hand side, closest to the gas pedal.

If I understand you correctly is that:

Number one switch: on the left hand side in pic with brown housing is the brake light switch. Which is NOT the faulty switch.

Number two switch: on the right hand side in the pic with the black housing is the switch to control the ABS and cruise control. Which IS the faulty switch.

Damn...this is like "who's on first and who's on second and I don't know whats on third".

kenny's 370z

yeah,the black cased switch(the one on the right in his pic) is the cruise killer when brakes are applied.thats the one i backed out.the other one(brown cased one)is the brake light switch.

asdfsammich

Thanks ZForce. That the perspective helps a lot. I think I'm going to talk to my service manager this week.


Tapatalk & such etc

ZForce

DIGItonium

So how did it go? Notice the motor sounds a bit different when you give it at least 50% throttle input?

We had record breaking highs yesterday at 75F, and I tried to get the oil temps up to 200F. Power-wise, it's not as exciting with the warmer ambient air, but I can still feel the continuous power increase as the throttle opens up.

Previously, power would build up and fall flat as I continue to press my foot down. My passengers think I lift my foot off the throttle.

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kenny's 370z

yes,motor has that metallic reverb now as it should be.if i start driving hard,i will start to get a delay but that is in part due to heat.driving normally shifting at 4k,car runs perfect.WAY better than before.feels like i got rid of the "anchor" i felt like i was dragging.