Something was posted on this and forgive me but I cant find it. Can someone link the discusion about the throttle closing back from WOT after a certain RPM or MPH or how to "fix" that if it can be done.

 

It's called DBW (drive-by-wire) and at WOT (wide open throttle) it can actually hold back up to 20%. The only "fix" that I am aware of is the TechnoSquare ECU reflash. google them and check it out for yourself

dan

 

yep, TS flash to fix. Reminds me I need to get in touch with those cats.

 

thanks very much

 

Throttle doesn't close on the 5.5gen, not sure about yours, but I don't think it does.

 

Nmex is right, I saw a graph that indicated no change in position and through my own testing I saw no evidence of such an anomaly

 

It gradually closes so it may not have shown on the graph. I noticed it when TS was tuning my ECU. I drove on a few different stages of tuning.

 

Voltage doesn’t change so it doesn’t close since it is controlled via voltage.

 

to be clear here. We're talking about a 6th gen 04 to 07 right? Theres some mention of a 5.5 gen and I'm not sure where that fits in years. Was also under the impression there was some proof of it. Maybe TechnoSquare is a better source to find out although for 500 smackers I'm sure I'll live with the "problem" at this point.

 

Well, the price can be semi-justified since TS does modify other parameters too.

I have the 5.5 gen (02-03) and stated I have never seen anything re: closing as RPM’s climb. It’s actually impossible since there are 4 sensors, and they must be within a certain tolerance with respect to voltage of each other or else the car will go into limp mode.

With that said, your foot is pegged so it’s(APPS 1&2) say 4.10V, and the TPS(1&2) (actual throttle plate) are @ 4.08V, if they deviate more than that(i.e. TPS starts to close) the car will go into limp mode since your foot isn’t letting off the pedal.(voltage stays @ 4.10v)

 

If this is correct how would an L-Spec pulled a little better than stock above 5500RPM? Like I said, I went thru the different tuning stages and had the car over night wth the basic L-Spec, 40 miles of driving to and from.

I'm not arguing with you found. I'm just wondering if there was more to it.

 

What is involved in L-spec? I have monitored the sensors with two different systems and niether one shows any change. I highly doubt it closes without a voltage change in sensors.

 

Tadashi told me that Nissan programs the throttle so that you get full open throttle under certain conditions and that its not like u bury ur foot and it opens up. I was there when Tadashi tuned my car and I could CLEARLY hear the throttle opening up AFTER the re flash but it didnt do it before it. I have read that NIssan also did htis with the 5th gen Maxima. but Icant confirm my source cuz it was a long time ago i read it.

 

The plate moves just like your right foot tells it to. Maybe a quarter second delay.

IMO, only the 7100 rev limit.

Never seen a dyno that confirms that. My before and after did not show that.