yay for utec, it seems like that thing has been a glitch monster ever since it's been released

 

i took out my plugs today. The coils, plugs and gaps were all fine but i changed the plugs in any case. Also i connected the black grounding wire too.

 

so what were the results? any better with the new plugs?

 

i couldn't try it yet

 

I have serial no. 12 and have had no issues with mine.

why do you say that, there have been very few bugs? WHy spread BS on one of the better products available for the Z?

 

i dunno, just reading lots of stuff about people saying it doesn't work right at WOT in open loop mode, or starts hesitating bad, or a few have even shorted out and stopped working. Also some cars have had detonation without that little knock light blinking. I'm sure several people are running just great though and i'm sure the bugs will be worked out

 

well there were 2 issues lately that affected some cars and caused some units to stop working and others to lose power. One was fixed with a flash the other with a proper ground wire.

The knock light is on the Tuner Pro module only and most people don't even have that. I wonder how they would even know if the light didn't flash and they had knock! Of course you can set the knock sensitivity so...

Its an EMS so there will be cars that run badly as a result of poor tunes.
Can't exactly blame the EMS for that. In any case, calling it a glitch monster is ridiculous.

 

maybe sentry65 was refering to some other UTEC unit like WRX or EVO coz when you have knock with those units, your CEL light flashes.

350Z UTEC is the most advanced piggyback i've ever tuned. it has some issues but remember that it's very new.

 

Ok i tried the car again yesterday and the problem is still there! What else can it be?

 

if you checked your plugs and they are good... how are the coil packs?

any Codes?

 

the plugs and the coils are just fine, in any case i've changed the plugs.

I've grounded UTEC.

There is a single code which is P0011 but i dont think that it has anything to do with my problem.

 

my other other thought maybe fuel..

 

what about fuel ? the AFR numbers look normal to me.

 

PO0011 is for the IVT (Intake Valve Timing) system so it might have to do with your issue.

 

how come?

 

Today i took some other logs about the issue in high RPMs. The starts to run super rich all of a sudden after 6000 rpms and sputters before it reaches redline. The rich condition doesn't change even if i pull a big amount of fuel from the map. This doesn't happen when boost < 7 psi. Can it be a fuel pressure issue? Maybe walbro isn't enough for 750cc RC injectors after 7 psi of boost as the pressure increases with boost.

here is another log :

3770 -4.5 3.56 36 00 00 W/B 56 +29.1 12.0 ECU. +0.0 2.78 >25:1
3468 -2.2 3.58 36 00 00 W/B 34 +35.2 12.7 ECU. +0.0 2.72 >25:1
3699 -2.0 3.60 48 00 00 W/B 47 +35.2 13.5 ECU. +0.0 2.96 21.66
3553 -0.2 3.74 52 00 00 W/B 79 +33.1 28.6 ECU. +0.0 2.90 15.02
3658 +1.1 4.15 70 10 00 W/B 13 +33.3 17.1 +25.7 +2.0 3.00 13.42
3699 +2.1 3.94 73 20 00 W/B 24 +33.1 19.4 +22.2 +2.0 3.13 13.20
3675 +3.2 4.07 75 20 00 W/B 68 +32.1 21.0 +21.5 +2.0 3.13 13.17
3762 +3.1 4.17 75 20 00 W/B 07 +31.0 22.6 +20.8 +2.0 3.23 13.20
3827 +4.2 4.17 76 20 00 W/B 71 +30.3 24.2 +20.2 +2.0 3.27 13.33
3831 +4.9 4.27 77 30 00 W/B 10 +29.9 25.7 +19.9 +2.0 3.25 13.17
3907 +5.2 4.33 75 30 00 W/B 14 +30.2 26.1 +19.0 +2.0 3.37 12.93
3858 +6.2 4.39 74 30 00 W/B 17 +30.0 26.5 +18.8 +2.0 3.41 12.68
3935 +6.6 4.47 74 40 00 W/B 27 +29.2 27.1 +18.0 +2.0 3.45 12.52
4060 +7.0 4.47 73 40 00 W/B 38 +29.2 27.8 +17.9 +2.0 3.45 12.46
3982 +7.2 4.58 73 40 00 W/B 42 +29.1 28.0 +17.7 +2.0 3.50 12.56
4006 +7.1 4.58 72 40 00 W/B 57 +30.1 29.1 +17.4 +2.0 3.50 12.68
4060 +8.1 4.60 73 40 00 W/B 80 +29.2 30.9 +17.3 +2.0 3.56 12.75
4130 +8.0 4.60 73 40 00 W/B 71 +28.1 29.7 +17.2 +2.0 3.56 12.75
4151 +8.6 4.70 73 40 00 W/B 72 +29.0 30.4 +17.1 +2.0 3.52 12.74
4208 +7.8 4.68 72 40 00 W/B 88 +28.1 31.1 +17.2 +2.0 3.58 12.68
4240 +8.5 4.78 72 40 00 W/B 98 +27.1 31.5 +17.2 +2.0 3.62 12.68
4290 +8.1 4.84 72 40 00 W/B 02 +26.2 32.0 +17.0 +2.0 3.66 12.64
4329 +7.1 4.76 73 40 00 W/B 35 +24.2 34.0 +17.4 +2.0 3.64 12.56
4403 +8.2 4.82 71 40 00 W/B 41 +25.1 34.2 +17.1 +2.0 3.64 12.37
4438 +8.5 4.82 71 40 00 W/B 77 +23.0 36.4 +16.9 +2.0 3.70 12.14
4498 +8.7 4.82 71 40 00 W/B 83 +23.1 36.7 +17.5 +2.0 3.70 11.96
4504 +7.6 4.86 70 40 00 W/B 91 +23.1 36.6 +17.2 +2.0 3.72 11.81
4559 +8.2 4.92 68 40 00 W/B 86 +23.1 37.4 +17.8 +2.0 3.78 11.76
4566 +8.6 4.96 68 40 00 W/B 89 +24.1 38.2 +18.0 +2.0 3.72 11.73
4623 +6.8 4.94 69 40 00 W/B 80 +24.0 38.0 +18.0 +2.0 3.74 11.76
4701 +8.5 4.98 69 40 00 W/B 73 +24.0 37.9 +19.0 +2.0 3.76 11.81
4748 +7.7 4.98 68 40 00 W/B 76 +24.0 38.9 +19.7 +2.0 3.76 11.89
4789 +7.7 5.00 68 40 00 W/B 75 +24.1 38.4 +19.2 +2.0 3.78 11.98
4852 +7.6 5.00 69 40 00 W/B 49 +24.1 38.1 +19.1 +2.0 3.80 12.09
4901 +7.5 5.00 69 40 00 W/B 57 +24.0 38.5 +19.9 +2.0 3.80 12.21
4887 +8.2 5.00 69 40 00 W/B 32 +24.0 38.2 +20.1 +2.0 3.80 12.33
5005 +8.8 5.00 68 40 00 W/B 32 +24.1 38.3 +18.3 +2.0 3.80 12.46
5042 +6.8 5.00 68 40 00 W/B 41 +24.1 39.2 +17.9 +2.0 3.98 12.59
5035 +8.9 5.00 79 40 00 W/B 35 +24.0 39.2 +18.3 +2.0 3.98 12.68
5120 +8.2 5.00 101 40 00 W/B 50 +24.1 40.4 +19.6 +2.0 3.98 12.74
5120 +8.9 5.00 100 40 00 W/B 54 +24.1 41.0 +18.9 +2.0 3.98 12.74
5192 +9.0 5.00 100 50 00 W/B 50 +24.0 41.1 +19.1 +2.0 3.98 12.71
5265 +9.0 5.00 101 50 00 W/B 50 +23.9 41.9 +19.2 +2.0 3.98 12.68
5265 +8.9 5.00 101 50 00 W/B 50 +24.0 41.9 +19.6 +2.0 3.98 12.67
5291 +7.8 5.00 100 50 00 W/B 64 +23.9 42.3 +20.7 +2.0 3.98 12.67
5359 +9.6 5.00 100 50 00 W/B 76 +24.0 43.4 +19.6 +2.0 3.98 12.67
5411 +9.4 5.00 101 50 00 W/B 60 +23.0 43.4 +20.5 +2.0 3.98 12.64
5464 +9.5 5.00 101 50 00 W/B 58 +22.8 43.8 +19.7 +2.0 3.98 12.61
5509 +8.8 5.00 100 50 00 W/B 80 +22.9 45.2 +20.7 +2.0 3.98 12.59
5564 +8.9 5.00 100 50 00 W/B 72 +23.9 45.2 +20.4 +2.0 3.98 12.56
5611 +8.8 5.00 101 50 00 W/B 77 +25.0 64.7 +19.5 +2.0 3.98 12.56
5602 +9.8 5.00 101 50 00 W/B 77 +24.9 64.9 +19.6 +2.0 3.98 12.30
5688 +9.9 5.00 100 50 00 W/B 77 +23.9 65.3 +19.6 +2.0 3.98 11.73
5747 +10.1 5.00 100 50 00 W/B 77 +24.0 64.7 +19.5 +2.0 3.98 11.28
5717 +8.5 5.00 100 60 00 W/B 77 +23.9 65.8 +19.7 +2.0 3.98 10.67
5767 +8.9 5.00 100 60 00 W/B 75 +23.9 66.2 +19.5 +2.0 3.98 10.33
5827 +9.5 5.00 100 60 00 W/B 75 +24.8 66.7 +18.9 +2.0 3.98 10.15
5807 +7.8 5.00 100 60 00 W/B 75 +24.9 66.3 +18.9 +2.0 3.98 10.01
5931 +10.5 5.00 100 60 00 W/B 71 +25.8 66.8 +17.9 +2.0 3.98 9.92
5847 +9.5 5.00 100 60 00 W/B 71 +25.8 67.6 +17.6 +2.0 3.98 9.77
5984 +8.8 5.00 100 60 00 W/B 69 +26.0 67.3 +17.6 +2.0 3.98 9.59
5941 +9.8 5.00 100 60 00 W/B 68 +26.9 67.9 +17.5 +2.0 3.98 9.34
5973 +10.8 5.00 100 60 00 W/B 67 +26.9 67.9 +16.6 +2.0 3.98 9.24
5995 +11.3 5.00 100 60 00 W/B 67 +27.8 67.9 +16.2 +2.0 3.98 9.24
6006 +11.0 5.00 100 60 00 W/B 69 +29.0 68.6 +16.2 +2.0 3.98 9.24
6071 +11.0 5.00 100 60 00 W/B 69 +27.9 68.4 +16.2 +2.0 3.98 9.24
6082 +11.9 5.00 100 60 00 W/B 72 +28.9 70.3 +16.1 +2.0 3.98 9.27
6093 +11.4 5.00 100 60 00 W/B 74 +28.7 70.3 +16.0 +2.0 3.98 9.27
6093 +9.9 5.00 100 60 00 W/B 77 +28.8 69.8 +15.9 +2.0 3.98 9.27
6161 +9.9 5.00 100 60 00 W/B 80 +28.9 70.7 +16.2 +2.0 3.98 9.31
6172 +11.0 5.00 100 60 00 W/B 80 +28.9 70.3 +16.2 +2.0 3.98 9.31
6172 +11.3 5.00 100 60 00 W/B 84 +29.4 71.2 +15.9 +2.0 3.98 9.29
6207 +9.8 5.00 100 60 00 W/B 83 +29.4 71.2 +16.2 +2.0 3.98 9.31
6230 +12.2 5.00 100 60 00 W/B 87 +29.4 72.0 +16.1 +2.0 3.98 9.27
6242 +9.4 5.00 100 60 00 W/B 87 +29.4 72.3 +15.9 +2.0 3.98 9.27
6253 +11.4 5.00 100 60 00 W/B 87 +29.4 72.3 +15.8 +2.0 3.98 9.29
6253 +11.0 5.00 100 60 00 W/B 87 +29.4 71.8 +16.0 +2.0 3.98 9.27
6150 +11.2 5.00 100 60 00 W/B 85 +29.4 71.3 +15.7 +2.0 3.98 9.21
6093 +8.4 5.00 100 50 00 W/B 79 +29.4 70.0 +16.0 +2.0 3.90 9.31
6535 +8.0 5.00 86 40 00 W/B 97 +30.7 48.9 +18.9 +2.0 3.98 9.92
6361 +1.2 2.92 0 10 00 W/B 68 +33.9 39.8 ECU. +2.0 1.47 10.27
6060 -6.7 1.94 0 00 00 W/B 35 +33.8 6.5 ECU. +0.0 2.43 11.14

 

I've had a similar problem with my Cobra that I've narrowed down to the Methanol Injection.

I get the same symptoms as you describe after about a week or so. I usually first notice it at the track. I get misfires at the top of 3rd and 4th on my first pass of the day. I go pack to the pits, change the plugs (Even though they look fine), problem solved. A week or so later it's back to the high rpm misfires.

I recently disabled the Methanol and put my regular tune back in. So far it's been over two weeks with no more misfires. Just thought I'd throw it out there in case you haven't considered it.

 

I had the same problem. My car would sputter like it was hitting the rev limiter at around 6000rpm. Sharif adjusted the knock sensor withthe UTEC and problem solved has not done it since.

 

very interesting coz nor the car neither UTEC shows any signs of knock. It would be great if Sharif could chime in here and tell me what to do

 

dude i will tell you what your problem is cause mine was doing that same thing on my first run before i tuned it.


probably two things actually, first off all you need to get some more fuel in there down low, its looking pretty lean, then one of your problems is you are running 9 to 1 AFR up top, thats what too much gas. it will cause it to smoke and backfire with it that rich.


also check your gains on you boost controller, if you have your set gain too low , it will cause the turbo to spool up and then it tapers off after a certain rpm.

what kinda EBC are you using??

also make sure that you knock sensitivity is like 100 90 80 70 60 60 make sure it needs 3 correlations before it retards the timing