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For anyone who encounter this issue, please park the car in neutral and observe the response time, rev level, and how long it holds before it drops back to idle: 1) Quickly stab the pedal to the floor and release it. 2) Fully press the pedal to the floor in a more casual fashion. 3) Turn off the car and let it "cool off" for about a minute. 4) Turn it back on and repeat steps 1 and 2. I did this today and got some interesting results. I got done recording video with oil temps close to 220F. Tomorrow morning I will do normal vids after the car warms up and upload it on YouTube. |
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Video Demonstration
The first half of the video demonstrates quick and casual depress of the pedal to the floor. When I say "quick" or "slow," that is when I start pressing down on the pedal. You will hear 2 clicks from the pedal, one hitting the floor, and one when it is fully released. The next half demonstrates a quick stab of the pedal to the floor in 1st and 2nd gear under normal conditions and after the extended period of driving (i.e., driving home from work). Impressions S-Mode or VDC does not appear to have any effect in holding revs. Regardless of the mode, the revs slowly climb, hang, and slowly return to idle when the engine is "hot." Also, the response is slower than usual as the engine does not easily rev past 2k RPM. Under "normal" conditions, the engine revs quicker easily beyond 3k RPM, the rise and fall is quicker, and it does not hang. After a cool down, it appears "normal" response returns, but it is no where near as good. In normal conditions, I can literally peel out and go side ways for a moment from a roll in 1st. After an extended period of driving, I can barely get the car to budge in 1st. It feels like accelerating in 2nd from a standstill. Now in 2nd gear, you can really see how slow the revs build up when the engine is "hot." Unfortunately, I could not demonstrate the throttle delay. It was hard to hold the camera. If I demonstrate it with the tech, I will literally floor it while making a turn to prove the car will not burn rubber or go side ways. |
Im going out tonight to do some photography. with this video in mind, i'll try and replicate what you did and see what the result is. Ill post my opinion when I get back.
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Update:
Just got home from the shoot and didn't experience anything like you said or like what was in the video. Even at 220 oil temp, no lag, no hesitation, nothing, just pure unadulterated POWA! I had an enlightening thought as well during the ride. I used to have the FI exhaust, and when I installed it, I distinctly remember losing a ton of back pressure and low end "uumph". I sold that exhaust and just put the stock back on and the car feels so much better in the low/mid rpms, "uumph"-wise. Your problem may be back pressure related. It'd be a pain in the ***, but if you put the stock exhaust back on, you'd feel the difference. |
All of that lost low and midrange torque can be recovered and more with a tune (which Digi might have), back pressure wouldn't explain the notable difference in engine response whilst revving the engine without any load.
I have never had that kind of power or response decrease when warm, however I could feel the car get slightly weaker and less punchy as the oil temperatures went up. Now that I have my oil cooler, the car feels so much more punchy and powerful all the time thanks to temps between 180-190 at all times. |
Well hopefully his dealer can get to the bottom of it.
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Wow Digi, that last clip was horrible on the RPM climb. My car sometimes feels laggy, but I don't think its ever been that bad.
Hope you get to the bottom of this |
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