UpRev ECU tune results for Semtex's Z

RCZ · 11-01-2009, 11:53 PM

weeks??? LOL this kind of thing they better fix in the next couple of hours...

B1nks · 11-02-2009, 12:03 AM

Quote:

Originally Posted by RCZ

weeks??? LOL this kind of thing they better fix in the next couple of hours...

I'm sure they'll take care of it ASAP. I am just worried I'll have to make another long trip to UpRev in Austin and if that's the case then..well i dunno what I'll do because that probably won't happen for a couple months at least but we'll see. I can't imagine this problem taking too long to fix because it would seem since they got most of this figured out already these little quirks would just be simple rounding out some rough edges. I also tried the stock map but couldn't tell it to be any different.

I also seriously doubt Sharif is screwing semtex, I would trust Sharif and I trust UpRev to fix the issue and make things right.

semtex · 11-02-2009, 07:24 AM

Sharif is a standup guy, 100%. He cared enough about what was going on with my car to call me Saturday night at 10pm to discuss it. That says it all. It is not my intention to cast aspersions on anyone's integrity here, be it Sharif's or UpRev's. I have 100% confidence in both parties. I have reported this issue only because it is my personal policy to be open and candid about whatever results I get, good or bad, for the betterment of the community (i.e., I believe in open knowledge-sharing amongst fellow enthusiasts).

RCZ · 11-02-2009, 08:03 AM

I don't know where you guys are getting the idea that anyone is saying otherwise. I don't doubt the integrity of either of these institutions. That is why I expect them to take care of it very quickly. People have to understand that these things happen and that they often are easy quick fixes.

I was thinking about this and wondering if you guys don't think it might not be UpRev's problem, but rather the effect of a Nissan safety feature responding to what it perceives as a problem. What I mean is that maybe Nissan has built in coldstart safety features. I know I've felt that hesitation where you push down and it does nothing and then lurches forward. I know the feeling you guys are talking about because I've definitely felt it (to a lesser extent) on my stock tune. So maybe its the ECU responding more aggressively to protect the engine during cold startups. I know there are lots of "maybes" here, but I'm just throwing out a somewhat logical explanation that may give someone an idea as to what's going on.

Just being logical eliminates tuners from the equation. The only two things everyone has in common are the uprev ROMs and the Nissan ECU. I doubt, after all these years of programming for Nissan and uprev's usage of other stock ECU functions, that they would have mistakenly cause a silly issue like this. Kinda leads me to think that the culprit is the new player in the mix...

B1nks · 11-02-2009, 08:19 AM

Quote:

Originally Posted by RCZ

I don't know where you guys are getting the idea that anyone is saying otherwise. I don't doubt the integrity of either of these institutions. That is why I expect them to take care of it very quickly. People have to understand that these things happen and that they often are easy quick fixes.

I was thinking about this and wondering if you guys don't think it might not be UpRev's problem, but rather the effect of a Nissan safety feature responding to what it perceives as a problem. What I mean is that maybe Nissan has built in coldstart safety features. I know I've felt that hesitation where you push down and it does nothing and then lurches forward. I know the feeling you guys are talking about because I've definitely felt it (to a lesser extent) on my stock tune. So maybe its the ECU responding more aggressively to protect the engine during cold startups. I know there are lots of "maybes" here, but I'm just throwing out a somewhat logical explanation that may give someone an idea as to what's going on.

Just being logical eliminates tuners from the equation. The only two things everyone has in common are the uprev ROMs and the Nissan ECU. I doubt, after all these years of programming for Nissan and uprev's usage of other stock ECU functions, that they would have mistakenly cause a silly issue like this. Kinda leads me to think that the culprit is the new player in the mix...

Makes sense, definitely possible.

semtex · 11-02-2009, 10:04 AM

Quote:

Originally Posted by RCZ

I don't know where you guys are getting the idea that anyone is saying otherwise. I don't doubt the integrity of either of these institutions. That is why I expect them to take care of it very quickly. People have to understand that these things happen and that they often are easy quick fixes.

I was thinking about this and wondering if you guys don't think it might not be UpRev's problem, but rather the effect of a Nissan safety feature responding to what it perceives as a problem. What I mean is that maybe Nissan has built in coldstart safety features. I know I've felt that hesitation where you push down and it does nothing and then lurches forward. I know the feeling you guys are talking about because I've definitely felt it (to a lesser extent) on my stock tune. So maybe its the ECU responding more aggressively to protect the engine during cold startups. I know there are lots of "maybes" here, but I'm just throwing out a somewhat logical explanation that may give someone an idea as to what's going on.

Just being logical eliminates tuners from the equation. The only two things everyone has in common are the uprev ROMs and the Nissan ECU. I doubt, after all these years of programming for Nissan and uprev's usage of other stock ECU functions, that they would have mistakenly cause a silly issue like this. Kinda leads me to think that the culprit is the new player in the mix...

I think B1nks was responding to NIZMOZ's assertion that "Sounds to me like Sharif is making excuses" when he stated that he doesn't think Sharif is screwing me. So I just wanted to be unequivocal in my agreement with him is all.

As for your theory about this being a coldstart safety feature, sure it's possible. But whatever it is, that doesn't mean we can't desire for UpRev to find a way around the 'feature', if they can. Unlike you, I never experienced this behavior in my car prior to the tune. So if it's a safety feature responding to a perceived problem, it's a perception that didn't exist in my particular car prior to the tune. Does that mean there really is a problem that now exists as a result of the Uprev flash? Or that there is no problem but the Nissan ECU is now confused? Who knows. But time will tell, after Uprev does their investigation. On the off chance that they say this the way it is, we have to live with it, I'm prepared to do just that. But at least people will know what to expect with Uprev tunes for this car moving forward.

B1nks · 11-02-2009, 10:59 AM

Quote:

Originally Posted by semtex

I think B1nks was responding to NIZMOZ's assertion that "Sounds to me like Sharif is making excuses" when he stated that he doesn't think Sharif is screwing me. So I just wanted to be unequivocal in my agreement with him is all.

As for your theory about this being a coldstart safety feature, sure it's possible. But whatever it is, that doesn't mean we can't desire for UpRev to find a way around the 'feature', if they can. Unlike you, I never experienced this behavior in my car prior to the tune. So if it's a safety feature responding to a perceived problem, it's a perception that didn't exist in my particular car prior to the tune. Does that mean there really is a problem that now exists as a result of the Uprev flash? Or that there is no problem but the Nissan ECU is now confused? Who knows. But time will tell, after Uprev does their investigation. On the off chance that they say this the way it is, we have to live with it, I'm prepared to do just that. But at least people will know what to expect with Uprev tunes for this car moving forward.

Yeah, that's what I was referring to. I too did not experience this problem prior to the flash on my stock settings. I'm hoping UpRev chimes in sometime today with any sort of news. Semtex do you know if Sharif has contacted UpRev about this yet ? I would assume he has but if he hasn't I will just to let them know what's up.

RCZ · 11-02-2009, 11:09 AM

You guys have never felt a gear go flat around 3k rpm on cold starts? Its slight, but its there...kinda feels like "ok buddy im cold, shift here please" It may well be a mechanical thing too from the engine just having to warm up to seal well.

I didnt say they couldn't. I want them to work around this problem just as much as you do, I'm waiting for the fix to go get the car tuned. I'm sure they will look at logs to see what the car is doing electronically around those points and pinpoint the problem then work out the bug. Its going to be a bit annoying to have to reproduce the problem on completely cold starts though haha. Chances are they are working on a fix right now...

semtex · 11-02-2009, 11:55 AM

Quote:

Originally Posted by B1nks

Yeah, that's what I was referring to. I too did not experience this problem prior to the flash on my stock settings. I'm hoping UpRev chimes in sometime today with any sort of news. Semtex do you know if Sharif has contacted UpRev about this yet ? I would assume he has but if he hasn't I will just to let them know what's up.

I do not know if Sharif has contacted UpRev yet. But I believe John from Z1 has. In any case, it wouldn't hurt for you to contact them as well just to make sure they're aware. Let me know what they say.

Quote:

Originally Posted by RCZ

You guys have never felt a gear go flat around 3k rpm on cold starts? Its slight, but its there...kinda feels like "ok buddy im cold, shift here please" It may well be a mechanical thing too from the engine just having to warm up to seal well.

I didnt say they couldn't. I want them to work around this problem just as much as you do, I'm waiting for the fix to go get the car tuned. I'm sure they will look at logs to see what the car is doing electronically around those points and pinpoint the problem then work out the bug. Its going to be a bit annoying to have to reproduce the problem on completely cold starts though haha. Chances are they are working on a fix right now...

I think you're experiencing something different. What I'm feeling isn't up at 3000rpm. It's between 1000-2500 rpm, right where you tip the throttle in as you feather in the clutch. The easiest way to describe the feeling is of a sticky throttle. You depress the gas pedal as you let in the clutch, and the revs just don't climb. It just kinda lags and you don't go anywhere. Then all of a sudden it 'unsticks' and jumps up to around 2500rpm (give or take a few hundred), resulting in a sudden lurch forward. So what happens (with me at least) is I reflexively disengage the clutch when I feel the lurch. But then I'm sitting still again. To a bystander on the outside, it probably looks like I'm brand new to driving MT. What I have to do to get moving is make a conscious effort to override my reflex and not disengage the clutch completely when it lurches. Just lighten up the clutch without complete disengagement. That way, I get actual forward motion and proceed on my way. It's anything but smooth. lol

chuckd05 · 11-02-2009, 02:11 PM

how long would you have to warm your car up to avoid the cold start issue you are having ?

semtex · 11-02-2009, 02:15 PM

^ Not sure. I haven't tried -- I don't have the patience. I'd guess around 3 mins. of just sitting there with the ending idling.

B1nks · 11-02-2009, 02:25 PM

if you wait even around 30 seconds or so and start to drive the really bad lurch won't happen. What I have noticed happening is, you get it into first and start driving and lets say you give it 30% throttle and hold it there. The revs will be lag, maybe something comparable to the feeling of turbo lag, and then without adjusting the throttle input the rpms will rise at the normal rate of speed. Now to a passenger it may just seem like you've just opened the throttle some but really it hasn't moved. Really something like turbo lag, as if you mashed the throttle down low and it just lags until the turbo kicks in and then kicks off. It will stop after 1-2 mins of driving though. These times also probably vary depending on how cold it is outside also.

semtex · 11-02-2009, 04:07 PM

Hmm...I always wait at least 30 seconds before I start driving and still have this lurch. I guess maybe it's not as bad as it'd be if I didn't wait before going, huh?

B1nks · 11-02-2009, 05:36 PM

yeah, probably..was hoping UpRev would have shown up with a post at least saying that they have been informed and will be looking into it or something..

jpit · 11-02-2009, 06:17 PM

They're probably on their way to SEMA.

11-02-2009, 07:24 AM	#3 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 33	Sharif is a standup guy, 100%. He cared enough about what was going on with my car to call me Saturday night at 10pm to discuss it. That says it all. It is not my intention to cast aspersions on anyone's integrity here, be it Sharif's or UpRev's. I have 100% confidence in both parties. I have reported this issue only because it is my personal policy to be open and candid about whatever results I get, good or bad, for the betterment of the community (i.e., I believe in open knowledge-sharing amongst fellow enthusiasts). __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

11-02-2009, 08:03 AM	#4 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	I don't know where you guys are getting the idea that anyone is saying otherwise. I don't doubt the integrity of either of these institutions. That is why I expect them to take care of it very quickly. People have to understand that these things happen and that they often are easy quick fixes. I was thinking about this and wondering if you guys don't think it might not be UpRev's problem, but rather the effect of a Nissan safety feature responding to what it perceives as a problem. What I mean is that maybe Nissan has built in coldstart safety features. I know I've felt that hesitation where you push down and it does nothing and then lurches forward. I know the feeling you guys are talking about because I've definitely felt it (to a lesser extent) on my stock tune. So maybe its the ECU responding more aggressively to protect the engine during cold startups. I know there are lots of "maybes" here, but I'm just throwing out a somewhat logical explanation that may give someone an idea as to what's going on. Just being logical eliminates tuners from the equation. The only two things everyone has in common are the uprev ROMs and the Nissan ECU. I doubt, after all these years of programming for Nissan and uprev's usage of other stock ECU functions, that they would have mistakenly cause a silly issue like this. Kinda leads me to think that the culprit is the new player in the mix... Last edited by RCZ; 11-02-2009 at 08:10 AM.

11-02-2009, 02:11 PM	#10 (permalink)
chuckd05 A True Z Fanatic Join Date: Oct 2009 Location: NY Posts: 2,391 Drives: No longer a Z Rep Power: 20	how long would you have to warm your car up to avoid the cold start issue you are having ? __________________ 09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)

11-02-2009, 02:15 PM	#11 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 33	^ Not sure. I haven't tried -- I don't have the patience. I'd guess around 3 mins. of just sitting there with the ending idling. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

11-02-2009, 04:07 PM	#13 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 33	Hmm...I always wait at least 30 seconds before I start driving and still have this lurch. I guess maybe it's not as bad as it'd be if I didn't wait before going, huh? __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

11-01-2009, 11:53 PM	#1 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	weeks??? LOL this kind of thing they better fix in the next couple of hours...

11-02-2009, 11:09 AM	#8 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	You guys have never felt a gear go flat around 3k rpm on cold starts? Its slight, but its there...kinda feels like "ok buddy im cold, shift here please" It may well be a mechanical thing too from the engine just having to warm up to seal well. I didnt say they couldn't. I want them to work around this problem just as much as you do, I'm waiting for the fix to go get the car tuned. I'm sure they will look at logs to see what the car is doing electronically around those points and pinpoint the problem then work out the bug. Its going to be a bit annoying to have to reproduce the problem on completely cold starts though haha. Chances are they are working on a fix right now...

11-02-2009, 02:25 PM	#12 (permalink)
B1nks Track Member Join Date: Apr 2009 Location: Houston,Tx Posts: 721 Drives: 2009 370Z Base 6MT Rep Power: 508	if you wait even around 30 seconds or so and start to drive the really bad lurch won't happen. What I have noticed happening is, you get it into first and start driving and lets say you give it 30% throttle and hold it there. The revs will be lag, maybe something comparable to the feeling of turbo lag, and then without adjusting the throttle input the rpms will rise at the normal rate of speed. Now to a passenger it may just seem like you've just opened the throttle some but really it hasn't moved. Really something like turbo lag, as if you mashed the throttle down low and it just lags until the turbo kicks in and then kicks off. It will stop after 1-2 mins of driving though. These times also probably vary depending on how cold it is outside also.

11-02-2009, 05:36 PM	#14 (permalink)
B1nks Track Member Join Date: Apr 2009 Location: Houston,Tx Posts: 721 Drives: 2009 370Z Base 6MT Rep Power: 508	yeah, probably..was hoping UpRev would have shown up with a post at least saying that they have been informed and will be looking into it or something..

11-02-2009, 06:17 PM	#15 (permalink)
jpit Enthusiast Member Join Date: Feb 2009 Location: Washington State Posts: 440 Drives: 370Z Tour MT w/Spt Rep Power: 17	They're probably on their way to SEMA.

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