CEL flashes, then car hesitates, then starts to pull again.

Looks like no knock, so why the CEL? Too much fuel?

Check out this log, input appreciated:

Load Knock Mod Mod Mod
RPM MAP MAF TPS Site Count AFR Ign#1 Inj#1 Ign Fuel Boost MAF
psig V % deg duty deg % (OL) V
3284 -13.2 1.4 0 0 0 24.5 11.4 4 ECU. 0 ECU. 1.6
3274 -13.2 1.7 0 0 0 24.5 11.4 4 ECU. 0 ECU. 1.5
3280 -13 1.5 0 0 0 24.5 11.3 4 ECU. 0 ECU. 1.5
3245 -13 1.5 0 0 0 24.5 11.4 4 ECU. 0 ECU. 1.5
3214 -11.4 2.9 34 0 0 24.5 26.2 16 ECU. 0 ECU. 2.9
3397 -8.1 2.9 69 10 0 16.4 24.8 13 ECU. 0 ECU. 3.1
3267 -4 3.2 96 20 0 rich 17 31 ECU. 0 80 3.3
3333 1.3 3.4 95 40 0 rich 10.6 48 18 1.5 80 3.6
3397 6.6 3.6 95 60 0 rich 9.3 57 18 1.5 80 3.6
3401 10.6 3.6 95 80 0 rich 9 57 18 1.5 80 3.7
3486 13.7 3.6 95 90 0 rich 9 57 18 1.5 80 3.7
3557 15.5 3.6 95 90 0 rich 9 59 18 1.5 75 3.7
3603 15.7 3.7 95 80 0 rich 8.6 60 18 1.5 75 3.7
3646 15.1 3.7 95 80 0 rich 8.5 60 18 1.5 75 3.6
3695 14.7 3.6 95 80 0 rich 9.3 62 18 1.5 75 3.7
3728 14.7 3.8 96 80 0 rich 10.8 62 18 1.5 75 3.7
3775 14.7 3.7 95 80 0 rich 11.4 62 18.2 1.5 75 3.7
3840 14.7 3.8 95 80 0 rich 11.7 63 18.4 1.5 75 3.7
3880 14.7 3.7 95 80 0 rich 12 64 19 1.5 75 3.7
3935 14.9 3.7 95 80 0 rich 12.3 65 19.2 1.5 75 3.7
3972 14.9 3.7 95 90 0 rich 13.1 65 19.6 1.5 75 3.8
4030 14.9 3.8 95 80 0 rich 13.5 67 20.1 1.4 75 3.8
4055 15.1 3.8 95 80 0 rich 13.4 69 20.2 1.3 75 3.9
4079 14.7 3.8 95 80 0 rich 13.2 70 20.5 1 75 3.8
4166 14.7 3.8 95 80 1 rich 13.2 70 12.4 0.9 75 3.8
4151 14.5 3.9 95 80 0 rich 14 71 12.7 0.8 75 3.8
4219 14.3 3.8 95 80 0 rich 13.7 71 12.9 0.5 75 3.8
4306 13.9 3.9 95 70 0 rich 13.6 72 13.1 0.5 75 3.8
4268 13.5 3.9 95 70 0 rich 13.9 74 21.2 0.5 75 3.8
4357 13.7 3.8 95 80 0 rich 13.4 75 21.6 0.5 75 3.8
4403 13.9 3.8 95 80 0 rich 13.3 76 22 0.5 75 3.9
4510 13.9 3.9 95 70 0 rich 13.6 77 21.8 0.5 75 3.9
4522 14.3 3.9 95 80 0 rich 13.3 78 22.2 0.5 75 3.9
4585 14.5 3.9 95 80 0 rich 13.7 79 22.1 0.5 75 3.9
4522 14.5 3.9 95 80 0 rich 13.8 80 22.3 0.5 75 3.9
4675 15.1 3.9 95 80 0 rich 14.1 81 22.4 0.5 75 3.9
4623 14.5 3.9 95 80 0 rich 14.6 81 22.9 0.5 75 4
4668 14.9 3.9 95 80 0 rich 14.4 82 22.7 0.3 75 3.9
4728 15.3 3.9 95 90 0 rich 14.8 82 23.1 0.3 75 4
4830 15.3 3.9 95 90 0 rich 14.9 83 23.2 0.3 75 4
4837 15.3 3.9 95 80 0 rich 15.3 85 23.4 0.5 75 4
4887 15.5 3.9 94 80 0 rich 15.6 85 23.6 0.4 75 4
4945 15.1 4 95 90 0 rich 16.1 85 23.6 0.5 75 4
4909 15.1 4 95 80 0 rich 16.7 85 23.9 0.4 75 4
4923 15.1 4 95 80 0 rich 17.1 86 23.7 0.2 80 4
5058 14.5 4 95 80 0 rich 17.3 87 24 0.2 80 4
5104 13.9 4.1 95 80 0 rich 17.8 88 24 0.2 80 4
5027 14.1 4 94 80 0 rich 17.5 91 24 0.2 80 4
5065 13.9 4.1 92 80 0 rich 17.4 89 24 0.2 80 4.1
5128 14.7 4 92 80 1 rich 15.6 90 16 0.2 80 4.1
5104 15.7 4 89 100 0 rich 16.8 91 16 0.2 80 4.1
5175 15.3 4.1 89 80 0 rich 17.2 92 16 0.2 80 4.1
5299 15.5 4.1 89 70 0 rich 17.4 91 24 0.2 80 4.1
5350 14.5 4.1 89 80 0 rich 17.3 92 24 0.2 80 4.1
5265 14.1 4.1 89 80 0 rich 17.5 90 24 0.2 80 4.1
5350 14.3 4.1 89 80 0 rich 17.8 92 24 0.2 80 4.1
5307 14.5 4.1 88 80 0 rich 17.8 92 24 0.2 80 4.1
5527 14.7 4.1 79 80 0 rich 17.6 93 24 0.2 80 4.1
5402 13.5 4.1 43 0 0 rich 18.3 36 ECU. 0 ECU. 3.4
5307 8.8 1.9 0 0 0 12.2 10.4 18 ECU. 0 ECU. 2
5393 2.3 2.1 0 0 0 24.2 10.6 18 ECU. 0 ECU. 2.1
5341 -4 2.1 0 0 0 24.2 10.6 18 ECU. 0 ECU. 2.2
5257 -10 2.2 0 0 0 lean 10.5 18 ECU. 0 ECU. 2.2
5291 -11.4 2.1 0 0 0 24.2 10.9 18 ECU. 0 ECU. 2.1
5216 -11.8 2.1 0 0 0 24.5 10.6 18 ECU. 0 ECU. 2
5216 -12 2 0 0 0 lean 10.7 18 ECU. 0 ECU. 2
5216 -12.2 1.5 0 0 0 24.5 10.7 18 ECU. 0 ECU. 1.9
5151 -12.6 1.9 0 0 0 24.2 10.7 18 ECU. 0 ECU. 1.9
5128 -12.8 1.9 0 0 0 24.2 10.6 18 ECU. 0 ECU. 1.9
5104 -13 1.9 0 0 0 lean 10.6 18 ECU. 0 ECU. 1.9
5058 -13 1.9 0 0 0 lean 10.8 18 ECU. 0 ECU. 1.9
4982 -13 1.9 0 0 0 24.2 10.6 18 ECU. 0 ECU. 1.9
5012 -13 1.9 0 0 0 24.2 10.6 18 ECU. 0 ECU. 1.9
4975 -13 1.9 0 0 0 24.5 10.6 18 ECU. 0 ECU. 1.9
4938 -13 1.9 0 0 0 lean 10.8 18 ECU. 0 ECU. 1.9
4945 -13.2 1.9 0 0 0 lean 10.7 18 ECU. 0 ECU. 1.9
4909 -13 1.9 0 0 0 24.5 11 18 ECU. 0 ECU. 1.9
4873 -13 1.9 0 0 0 lean 10.7 18 ECU. 0 ECU. 1.9
4830 -13 1.9 0 0 0 lean 10.9 18 ECU. 0 ECU. 1.9
4837 -13 1.8 0 0 0 24.5 10.7 18 ECU. 0 ECU. 1.9
4789 -13 1.9 0 0 0 24.5 10.8 18 ECU. 0 ECU. 1.9
4768 -13 1.8 0 0 0 24.5 10.7 18 ECU. 0 ECU. 1.8
4721 -13 1.8 0 0 0 24.5 10.8 18 ECU. 0 ECU. 1.8
4681 -12.8 1.8 0 0 0 24.5 10.7 18 ECU. 0 ECU. 1.8
4681 -13 1.8 0 0 0 24.5 10.8 18 ECU. 0 ECU. 1.8
4655 -12.8 1.8 0 0 0 24.2 11 18 ECU. 0 ECU. 1.8
4610 -12.8 1.8 0 0 0 24.5 10.9 18 ECU. 0 ECU. 1.8
4591 -13 1.8 0 0 0 lean 10.7 18 ECU. 0 ECU. 1.8
4591 -13 1.8 0 0 0 24.2 10.8 18 ECU. 0 ECU. 1.7
4541 -13.2 1.7 0 0 0 24.2 11 18 ECU. 0 ECU. 1.7
4528 -13 1.7 0 0 0 24.2 10.7 18 ECU. 0 ECU. 1.7
4528 -13.2 1.7 0 0 0 24.2 10.8 18 ECU. 0 ECU. 1.7
4492 -13 1.7 0 0 0 24.5 10.9 18 ECU. 0 ECU. 1.7
4420 -13 1.7 0 0 0 24.2 10.9 18 ECU. 0 ECU. 1.7
4420 -13.2 1.6 0 0 0 24.2 10.9 18 ECU. 0 ECU. 1.6
4397 -13.2 1.7 0 0 0 24 11 18 ECU. 0 ECU. 1.6
4391 -13.2 1.6 0 0 0 24 11 18 ECU. 0 ECU. 1.6
4374 -13.2 1.6 0 0 0 24.2 11 18 ECU. 0 ECU. 1.6
4295 -13.2 1.6 0 0 0 24.5 10.8 18 ECU. 0 ECU. 1.7
4301 -13.2 1.6 0 0 0 24.5 10.9 18 ECU. 0 ECU. 1.6
4278 -13.4 1.6 0 0 0 24.5 10.9 18 ECU. 0 ECU. 1.6
4224 -13.4 1.6 0 0 0 24.2 11 18 ECU. 0 ECU. 1.6
4219 -13.4 1.6 0 0 0 24.2 10.7 18 ECU. 0 ECU. 1.6
4192 -13.2 1.6 0 0 0 24.2 10.7 18 ECU. 0 ECU. 1.6
4171 -13.2 1.6 0 0 0 24.2 10.9 18 ECU. 0 ECU. 1.6
4151 -13 1.6 0 0 0 24.2 10.9 18 ECU. 0 ECU. 1.6
4140 -13 1.6 0 0 0 24.2 10.9 18 ECU. 0 ECU. 1.6
4100 -13.2 1.6 0 0 0 24.2 10.8 18 ECU. 0 ECU. 1.6
4110 -13.2 1.6 0 0 0 24 10.8 18 ECU. 0 ECU. 1.6
4070 -13.2 1.6 0 0 0 lean 10.9 18 ECU. 0 ECU. 1.6
4060 -13.2 1.6 0 0 0 24.2 10.9 18 ECU. 0 ECU. 1.6
4045 -13.2 1.6 0 0 0 lean 10.9 18 ECU. 0 ECU. 1.6
4001 -13 1.6 0 0 0 24.2 10.8 18 ECU. 0 ECU. 1.6
3992 -13.2 1.6 0 0 0 24.2 11 18 ECU. 0 ECU. 1.6
3958 -13 1.6 0 0 0 24.2 10.9 18 ECU. 0 ECU. 1.6

Load Knock Mod Mod Mod
RPM MAP MAF TPS Site Count AFR Ign#1 Inj#1 Ign Fuel Boost MAF
psig V % deg duty deg % (OL) V
3591 -9.8 2.3 8 0 0 13.9 39.5 12 ECU. 0 ECU. 2.6
3591 -9.8 2.3 8 0 0 14.8 36.3 16 ECU. 0 ECU. 2.7
3561 -9.1 2.6 15 0 0 14.8 31.1 15 ECU. 0 ECU. 2.9
3584 -6.9 3.1 50 0 0 16.7 27.2 16 ECU. 0 ECU. 3.2
3603 -3.4 3.5 95 20 0 rich 15.5 42 ECU. 0 75 3.6
3667 1.3 3.7 96 40 0 rich 9.2 62 18 1.5 75 3.7
3675 7 3.7 95 70 0 rich 9.5 65 18 1.5 75 3.8
3695 11.1 3.7 95 80 0 rich 9.6 64 18 1.5 75 3.7
3822 13.5 3.7 95 80 0 rich 10.1 63 18.4 1.5 75 3.8
3844 14.7 3.7 95 80 0 rich 10.8 64 18.6 1.5 75 3.7
3894 14.9 3.7 95 80 0 rich 10.9 65 19 1.5 75 3.8
3921 14.7 3.7 95 80 0 rich 11.7 65 19.4 1.5 75 3.8
3972 14.7 3.7 95 80 0 rich 13.2 66 19.8 1.5 75 3.7
4006 14.7 3.8 95 80 0 rich 13.4 67 20 1.5 75 3.9
4065 14.3 3.7 95 80 0 rich 13.4 69 20.2 1.3 75 3.8
4125 14.1 3.8 95 80 0 rich 13.3 70 20.4 1.1 75 3.9
4145 13.9 3.8 95 80 0 rich 13.2 70 20.6 0.9 75 3.8
4145 13.9 3.8 95 80 0 rich 13.1 70 20.8 0.8 75 3.8
4219 13.7 3.8 95 80 0 rich 12.7 72 20.9 0.6 75 3.9
4278 13.9 3.9 95 80 0 rich 12.9 73 21 0.5 75 3.8
4295 13.9 3.8 95 80 0 rich 12.7 73 21.2 0.5 75 3.9
4368 13.7 3.8 95 70 0 rich 12.2 73 21.4 0.5 75 3.9
4438 13.9 3.9 95 70 0 rich 13.2 75 21.8 0.5 75 3.9
4468 13.7 3.9 95 80 0 rich 13.6 78 22 0.5 75 3.9
4535 13.5 3.9 95 80 0 rich 13.5 78 21.9 0.5 75 3.9
4616 14.1 3.8 95 80 0 rich 14 79 22.2 0.5 75 3.9
4597 14.5 3.9 95 80 0 rich 13.8 80 22.2 0.5 75 3.9
4604 14.3 3.9 95 80 0 rich 14 80 22.8 0.5 75 3.9
4649 14.9 3.9 95 80 0 rich 14 81 22.6 0.5 75 3.9
4734 14.5 3.9 95 80 0 rich 14.5 81 22.9 0.3 75 3.9
4688 14.3 4 95 80 0 rich 14.8 80 22.8 0.3 75 4
4714 14.7 3.9 95 80 0 rich 14.8 82 23.2 0.3 75 4
4866 14.3 3.9 95 80 0 rich 15.1 84 23.4 0.5 75 3.9
4887 13.9 4 95 70 0 rich 15.2 84 23.6 0.5 75 4
4901 13.5 4 95 70 0 rich 16 85 23.8 0.4 75 4
4880 13.3 4 95 70 0 rich 16.3 84 23.9 0.4 75 4
4982 13.3 4 95 80 0 rich 16.8 85 23.8 0.2 80 4
5020 13.9 4 95 80 0 rich 17.4 87 24 0.2 80 4
5035 14.5 4 95 80 0 rich 17.7 89 24 0.2 80 4
5050 14.7 4 95 80 0 rich 17.5 89 24 0.2 80 4.1
5128 14.7 4 95 80 0 rich 17.4 89 24 0.2 80 4
5175 15.1 4 95 80 0 rich 17.8 89 24 0.2 80 4.1
5192 15.5 4 95 90 0 rich 19.2 91 24 0.2 80 4.1
5208 15.3 4.1 95 80 0 rich 18.4 90 24 0.2 80 4.1
5257 15.3 4.1 95 80 0 rich 19.5 91 24 0.2 80 4.1
5299 14.1 4.1 95 70 0 rich 19.4 91 24 0.2 80 4.1
5402 13.1 4.1 95 70 0 rich 19.4 91 24 0.2 80 4.1
5324 13.3 4.1 95 70 0 rich 19.9 92 24 0.2 80 4.1
5437 12.9 4.1 95 80 0 rich 20 91 24 0.2 80 4.1
5393 13.3 4.1 95 70 0 rich 20 92 24 0.2 80 4.1
5411 13.3 4.1 95 70 0 rich 20.6 92 24 0.2 80 4.1
5455 13.1 4.1 95 70 0 rich 20.6 92 24 0.2 80 4.1
5464 13.1 4.1 40 0 0 rich 24.3 23 ECU. 0 ECU. 2.6
5411 7.6 1.9 0 0 0 12.5 10.6 21 ECU. 0 ECU. 2
5393 1.7 2.2 0 0 0 lean 10.7 21 ECU. 0 ECU. 2.2
5428 -4.7 2.1 0 0 0 lean 10.8 21 ECU. 0 ECU. 2.1
5393 -10.8 2.2 0 0 0 24.2 10.8 21 ECU. 0 ECU. 2.2
5316 -11.6 2.1 0 0 0 lean 10.6 21 ECU. 0 ECU. 2.1
5282 -11.8 2.1 0 0 0 24.2 10.5 21 ECU. 0 ECU. 2
5307 -12 2 0 0 0 24.5 10.7 21 ECU. 0 ECU. 2
5232 -12.4 1.5 0 0 0 24.2 10.6 21 ECU. 0 ECU. 2
5208 -12.8 1.9 0 0 0 24.5 10.7 21 ECU. 0 ECU. 2
5216 -13 1.9 0 0 0 lean 10.8 21 ECU. 0 ECU. 2
5175 -12.8 2 0 0 0 24.5 10.8 21 ECU. 0 ECU. 1.9
5112 -12.8 1.9 0 0 0 24.2 10.7 21 ECU. 0 ECU. 1.9
5096 -12.8 1.9 0 0 0 24.2 10.6 21 ECU. 0 ECU. 1.9
5058 -12.8 1.9 0 0 0 24.2 10.5 21 ECU. 0 ECU. 1.9
5050 -12.8 1.9 0 0 0 24.2 10.7 21 ECU. 0 ECU. 1.9
4975 -12.8 1.9 0 0 0 lean 10.8 21 ECU. 0 ECU. 1.9
4945 -13 1.9 0 0 0 lean 10.8 21 ECU. 0 ECU. 1.9
4837 -13 1.9 0 0 0 24.5 10.8 21 ECU. 0 ECU. 1.9
4844 -13 1.9 0 0 0 24.5 10.7 21 ECU. 0 ECU. 1.9
4852 -13 1.9 0 0 0 24.5 10.7 21 ECU. 0 ECU. 1.9
4721 -13 1.9 0 0 0 lean 10.7 21 ECU. 0 ECU. 1.8

Well... First of all your hitting 92% duty on your injectors which isn't to good. The flash and hesitation could be a misfire, but I'm not 100% on that.

...but this is from the base Stg 2 map!?

I think I'll call TXS later today.

Anyone else?

Try pulling 1 degree of timing in the knock areas. Of course, calling TurboXS is a good idea too.

Your AFR is all over the place because it changes when you back off the gas, all you need to do is look at the TPS position in the log to see when you’ve backed off the gas.

You do have 2 knock events in the second log that you'll need to tune out though.

Try pulling 1 degree from 3000-5000rpms at 80% load.
Then pull 2 degrees from 3000 to redline at 90% load.
Then pull 3 degrees from 3000-redline at 100% load.

You should never see 100% load on a stage 1 or 2 car, but the extra safety of the 3 degrees being pulled from that load range will give you some margin for error.

-Nathan
www.turboxs.com

Yeah, I just noticed that, so that's normal, kinda' freaked late last night.

What about the "rich" reading, is that normal? I would think that I it should be a number in the low teens.

Also, should I be worried about the injector duty cycle numbers?

Originally posted by jpmarotta
Yeah, I just noticed that, so that's normal, kinda' freaked late last night.

What about the "rich" reading, is that normal? I would think that I it should be a number in the low teens.

Also, should I be worried about the injector duty cycle numbers?


The rich reading should not really be trusted as you are trying to tune the car to an air/fuel ratio where the factory o2 sensor is not accurate. There is no substitute for a real WBo2 sensor.

Injector duty cycle is a fact of life on the stock injectors. Should you be worried? You don't have full control of your injectors at that duty cycle, but you are likely plenty rich to not have to worry about it that much.

-Nathan
www.turboxs.com

Kewl Nathan,

Greddy A/F going in the next couple weeks.

Putting an uppipe in this weekend, so I'll just make the slight changes you mentioned, take it easy until after the install, and then perform some more runs.

Thanks again.
Jason

Originally posted by jpmarotta
Kewl Nathan,

Greddy A/F going in the next couple weeks.Thanks again.
Jason

Jason,
I'd save your money as the greddy is just about useless.

-Nathan
www.turboxs.com

Also, calibrating your TPS wouldn't be a bad thing. (UTEC User Manual, Appendix A)

A little off track here... but is there any really good A/F gauge? I'm using an autometer and it says I'm running lean when I turn my light on and jumps into the red when my music is on. Looks like volatge spikes, but maybe that's not the gauge hmmm...

Originally posted by nmyeti


Jason,
I'd save your money as the greddy is just about useless.

-Nathan
www.turboxs.com

Originally posted by seven881
A little off track here... but is there any really good A/F gauge?


http://www.techedge.com.au/vehicle/wbo2/default.htm

That's one of the cheaper ways to get into a true wideband. Anything that taps into a standard O2 sensor is nearly worthless as soon as you get outside of stoichiometric range (14.7:1)