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UpRev ECU tune results for Semtex's Z

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

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Old 11-02-2009, 03:11 PM   #91 (permalink)
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how long would you have to warm your car up to avoid the cold start issue you are having ?
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Old 11-02-2009, 03:15 PM   #92 (permalink)
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^ 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.
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Old 11-02-2009, 03:25 PM   #93 (permalink)
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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.
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Old 11-02-2009, 05:07 PM   #94 (permalink)
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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?
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Old 11-02-2009, 06:36 PM   #95 (permalink)
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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..
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Old 11-02-2009, 07:17 PM   #96 (permalink)
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They're probably on their way to SEMA.
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Old 11-02-2009, 07:39 PM   #97 (permalink)
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is this happening on the 7ATs too? Or has no AT been tuned yet?
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Old 11-02-2009, 09:05 PM   #98 (permalink)
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Quote:
Originally Posted by Zsteve View Post
is this happening on the 7ATs too? Or has no AT been tuned yet?
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Originally Posted by caneman88 View Post
After the tune on Wednesday at UpRev I noticed the same thing I have the AT but you push the throttle and it almost seems like your in neutral the the gear grabs and it takes off. Also the Vallet mode did not work they said they would work on a fix for it Theft mode did not seem to work either.
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Old 11-02-2009, 10:30 PM   #99 (permalink)
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Rich did say last week he was going to SEMA he was staying at the Stratosphere I think that is the name Maybe we can call him there
I am going to take the Texas Titan to Uprev on Wed to get tuned.I will get some info then. There it is in the background
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Old 11-02-2009, 10:51 PM   #100 (permalink)
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Oh yeah, he is at SEMA but Jared and the rest should be there and that's who matters in this instance. I'll call tomorrow to find something out..not sure they even get on here since Rich does most of the marketing side of things.
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Old 11-03-2009, 12:56 AM   #101 (permalink)
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So are we seeing the opposite trend of trying to reduce the throttle lag and improve response? :-(
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Old 11-03-2009, 08:32 AM   #102 (permalink)
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Originally Posted by DIGItonium View Post
So are we seeing the opposite trend of trying to reduce the throttle lag and improve response? :-(
Only at cold start for the first couple of mins. After that, it's all good. I've actually started to get used to the behavior and, this morning, was able to change the way I modulate the clutch enough to actually get off the line semi-smoothly. I wouldn't switch back to my stock ROM right now even if I could. The benefits of the tune outweigh this minor bug. Of course, that's just my opinion as it relates to my specific car. Others may feel differently. And for 7AT models, there's no way to change the way you modulate the clutch, so there's no workaround if you have a 7AT (point being, this still needs to be fixed).
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Old 11-03-2009, 08:52 AM   #103 (permalink)
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Quote:
Originally Posted by B1nks View Post
Oh yeah, he is at SEMA but Jared and the rest should be there and that's who matters in this instance. I'll call tomorrow to find something out..not sure they even get on here since Rich does most of the marketing side of things.
Rich would be the one going to Sema if anyone went. Jared would stay at the shop with the other guys doing the tunes as he knows the software in and out while Rich is just the sales person.
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Old 11-03-2009, 09:55 AM   #104 (permalink)
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Knowing how uprev works, they should have a fix really really quickly. And the issue is only on cold start for a few seconds. After that, it seems normal.
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Old 11-03-2009, 09:58 AM   #105 (permalink)
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Originally Posted by Sharif@Forged View Post
Knowing how uprev works, they should have a fix really really quickly. And the issue is only on cold start for a few seconds. After that, it seems normal.
Sharif, have you talked to them to confirm they're aware of the issue?
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