Jared, I sent you an e-mail. I'm willing to help out if I can.

Agreed. And forget about doing what's best for the country. That doesn't even factor into their decision making process. In fact, several years ago, the execs at IBM made a point of telling us all that we should no longer consider IBM to be an American company. We're a Global company now; we transcend the boundaries of nation-states. Basically, it was their way of telling us that U.S. national interests were no longer their concern. The only interests they are concerned about are those related to the stock valuation.

Jared, I live about 5 min away and can maybe take you up on your offer. I'll give you guys a call in the morning if i dont hear back first.

Jared,

It also threw code P0221 at the same time as the P2721. I have seen this code many times on other cars when there is any type of problem with acceleration.

From Nissan OBD-II Trouble Code P0221

P0221

Trouble diagnosis name: Throttle position sensor circuit range/performance problem

Component Description

Electric Throttle Control Actuator consists of throttle control motor, throttle position sensor, etc. The throttle position sensor responds to the throttle valve movement.

The throttle position sensor has the two sensors. These sensors are a kind of potentiometers which transform the throttle valve position into output voltage, and emit the voltage signal to the ECM. In addition, these sensors detect the opening and closing speed of the throttle valve and feed the voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition.

DTC detecting condition:

* Rationally incorrect voltage is sent to ECM compared with the signals from TP sensor 1 and TP sensor 2.

Possible cause:

* Harness or connector (The TP sensor 1 and 2 circuit is open or shorted.)
* Electric throttle control actuator (TP sensor 1 and 2) may be faulty

Umm...sounds like you guys found the issue. Now to fix it...

Yep, sounds like something in the ETC patch is haywire.

cotizi is going to drop his Z with us tonight or tomorrow so that we can start the trouble shooting and get this resolved.

Jared@UpRev.com

Glad to help. :)

I dropped my car off this afternoon, so hopefully they will have the fix worked out by tomorrow, but we will see. Based on what Jared told me, I think the more time they have to work with an actual vehicle the better for all of us.

Thanks a ton for doing this, cotizi! Giving you some rep. :tup:

good job cotizi!

Well, it doesn't appear to be a problem with the ETC. It looks like it a problem with the ignition advance. Stock car when cold runs between 30-45 degrees of advance as you tip into the throttle below 2K RPM. With the Osiris ROM it's running -7 degrees right up to the point where the engine actually starts to rev up.
We've got a few things to try, but we can only run 1 or 2 test before the car is up to temp and the problem goes away.
I'll post more tomorrow when the car has cooled off and we can run a few more tests.
Jared@UpRev.com

The throttle DTCs are probably due to the ECU seeing the sensors rise, but the engine RPMs stay level or even drop.

It's actually not as bad in every country. I had a European explain it to me:

"In most areas of Europe, management looks at the labor force as an asset. If they have a good worker, they want to do everything they can to keep that person working in their company. They look at companies like a family; if the company does well, they assume that EVERYONE from top to bottom had a hand in it. In America, labor is looked at purely as a liability. Management has absolutely no desire to cultivate their workers, and if they can find someone to do the job for less money, they are more than happy even if the replacement is of lower quality. If a company does well, all of the credit goes to the executives and upper level management."

A bit of a generalization of course, but I think it's about as good of an explanation as I've heard.

There is such a huge clash of discussions going on in this thread, its sickening. haha

Just got off the phone with Jared, I'll let him explain exactly what they did, but looks like they made necessary fixes, and have moved on to dyno-tuning my car tonight.

I agreed to let them keep my car until tomorrow afternoon so they can get some more time with the car to add in some development features they are working on.


get excited! lol

Oooo, new development features, do you have more info on that?

Not really to be honest, I think its mostly adding back in some features in Cipher that are currently unavailable for our platform.

Hey where did you get those slick straight pipes LOL :tup:
Had my Titan over there on Wed and saw your ride looks like you got some the nice Austin hail!
You will see a big difference with the tune.
The Titan kicks *** now almost as fast as my 370

didn't expect to still see the blue 350z in the parking lot in that pic. That poor guy, oh well thanks for spending all this attention on us UpRev !

Dude my poor car. I ate hail 2 days before I moved into my new house with a garage.

Got bored one weekend and decided to make those turn-downs to see what it would sound like. They are quite ghetto but hopefully my FI exhaust will ship Friday or Monday!

I was watching Jared tune your Titan on the dyno. Pretty impressive!

Cotizi, did you not already have your car dyno-tuned prior to this? Does this mean that once the fix is in, we'll all have to have our cars re-tuned???

No, my car was stock with Intakes. They were going to flash it, fix the problems, and then after those are fixed, just go ahead and tune my car. Based on that, it seems they simulated the problem and fixed it on my car without ever dyno tuning it.

Okay, cool. *whew*

This means I'll be getting a tune next week :)

Great News on the fix ! Im excited to here it was done in such a timely matter, now all thats left is uprev taking care of the people who got their tunes with problems at no charge and making the cars back to normal....

And this is a very important thread regarding uprevs tunes and services, why are people talking about the American corporate structure ? Its retarded.. take that to the lounge

What, I can't go off on a tangent in my own thread in response to someone asking me what mods I have planned next?

Update:
I went and picked up my car this afternoon. I didn't really gain anything from the tune at all, but I didn't know what to expect with a basically stock car. The car managed to put down about 295RWHP which I think is respectable with just intakes.

I think there is a lot of potential in the VQ37 once more development is done, especially regarding VVEL.

295 on a DynoJet with just intakes is very respectable. You'll have to confirm for us that there's no stutter on cold start. :tup:

lol. will do! he explained to me what the problem was, but I've already forgot the correct explanation.

As a testament to UpRev's business practices, they charged me nothing for the re-flash, and nothing for the dyno time, in exchange for letting them use my car for a few days.

I think we are definately in the early stages of seeing what the platform can really put out.

Lol who do you think you are?

Its HIS thread :gtfo2:

Jared,

If you are watching this board, I am scheduled to go to Indecracing in Tacoma, WA tomorrow to have the cold start problem fixed. Will they have the new program available? Thanks.

ran the car tonight from cold-start and didn't have any issues, ran the same as it always has

Awesome!

:wtf2::wtf2::wtf2:

The updates are on the site and ready. Pro tuners just need to run the updater program to get the latest ROM files. Then copy the tune from the old ROM into the new one and flash it onto the ECU. Problem solved. No need for retuning.
There are two handy utilities in the ROM editor that make copying the tune over a snap. Just use "Export all tune data" on the old ROM, then open the new ROM and use "Import all tune data".

Jared@UpRev.com

^ Very cool. Contacting my tuna :)

Oh, and the actual bug was that the cold condition ignition table was being looked up wrong. The patch we did shifted the whole table by a couple of columns, so when the car was cold and at low load, the software was actually looking outside of the table and getting bad values for the ignition advance. Pretty simple fix once we figured out where the problem was.

Thanks for resolving this issue so quickly, Jared. I'm sure I speak for all of us when I tell you that we're very grateful!

Shiiiiiiiiiiiiit, I know I'm grateful, it was embarrasing lol. Thanks Jared and I'll be getting a Cypher cable ASAP !

Quick update. Sharif loaded the updated ROM into my ECU yesterday, and I can confirm that the cold start issue is indeed fixed. No more lurching! :tup: