Stage 1 Map help
Sep 7, 2004, 08:45 PM
#1
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Stage 1 Map help (logs included)
Here are two logs. The first log is map 0 with the Turbo XS TBE in 3rd gear. Second log is Stage1 (2nd gear) with the ECU controlling the timing, but the UTEC controlling fuel and boost. Now, why is the stock ECU wanting to run more advanced timing when the UTEC is pulling fuel? Shouldn't the ECU be pulling timing?
Now, looking at the stock pull w/ TBE, it looks like the ECU wants to run hardly any aggressive timing... +3 - +5 from 3k-5.5k RPM's. This is significantly less than the stage1 map which hovers between +5 - +7 in this area. So.. pull timing by 1-2 degrees and add 1-2 points of fuel everywhere if I want to run absolutely safe?
Stock ECU w/ UTEC observing
Stage 1 w/ ECU controlling timing
Now, looking at the stock pull w/ TBE, it looks like the ECU wants to run hardly any aggressive timing... +3 - +5 from 3k-5.5k RPM's. This is significantly less than the stage1 map which hovers between +5 - +7 in this area. So.. pull timing by 1-2 degrees and add 1-2 points of fuel everywhere if I want to run absolutely safe?
Stock ECU w/ UTEC observing
Code:
2913,+27.2, 132, 16, 00, 00, +43.6, 5.0,ECU. , +0.0,ECU. , 129 2949,+27.2, 156, 17, 00, 00, +43.5, 5.0,ECU. , +0.0,ECU. , 163 2913,+27.2, 170, 19, 00, 00, +40.7, 7.0,ECU. , +0.0,ECU. , 175 2942,+27.0, 215, 22, 00, 00, +36.5, 8.0,ECU. , +0.0,ECU. , 232 2984,+27.2, 287, 31, 00, 00, +27.7, 11.0,ECU. , +0.0,ECU. , 288 3024,+27.2, 346, 37, 00, 00, +25.6, 13.0,ECU. , +0.0,ECU. , 357 3118,+27.0, 438, 61, 10, 00, +20.6, 16.0,ECU. , +0.0,ECU. , 465 3189,+27.0, 525, 90, 10, 00, +17.4, 19.0,ECU. , +0.0,ECU. , 571 3229,+27.2, 405,100, 10, 00, +14.7, 21.0,ECU. , +0.0,ECU. , 437 3330,+27.2, 478,100, 10, 00, +10.4, 26.0,ECU. , +0.0,ECU. , 645 3483,+27.2, 738,100, 10, 00, +8.3, 32.0,ECU. , +0.0,ECU. , 681 3572,+27.2, 671,100, 10, 00, +5.5, 38.0,ECU. , +0.0,ECU. ,1048 3671,+27.2, 899,100, 10, 00, +4.9, 43.0,ECU. , +0.0,ECU. ,1052 3770,+27.0, 884,100, 20, 00, +4.3, 47.0,ECU. , +0.0,ECU. ,1068 3912,+27.2, 736,100, 20, 00, +4.2, 50.0,ECU. , +0.0,ECU. ,1285 4084,+27.2,1196,100, 30, 00, +3.1, 50.0,ECU. , +0.0,ECU. ,1128 4230,+27.2,1016,100, 20, 00, +3.6, 50.0,ECU. , +0.0,ECU. , 922 4317,+27.2,1082,100, 20, 00, +4.1, 51.0,ECU. , +0.0,ECU. ,1094 4420,+27.2, 896,100, 30, 00, +4.1, 52.0,ECU. , +0.0,ECU. , 889 4597,+27.2,1149,100, 30, 00, +3.8, 55.0,ECU. , +0.0,ECU. ,1234 4734,+27.2,1118,100, 40, 00, +4.4, 57.0,ECU. , +0.0,ECU. ,1295 4803,+27.0,1196,100, 40, 00, +4.5, 58.0,ECU. , +0.0,ECU. ,1336 4916,+27.0,1302,100, 50, 00, +5.5, 58.0,ECU. , +0.0,ECU. ,1141 5096,+26.8,1113,100, 50, 00, +5.6, 61.0,ECU. , +0.0,ECU. ,1288 5184,+26.8,1237,100, 50, 00, +6.0, 63.0,ECU. , +0.0,ECU. ,1138 5291,+27.0,1201,100, 60, 00, +5.8, 65.0,ECU. , +0.0,ECU. ,1193 5411,+27.0,1170,100, 60, 00, +5.8, 67.0,ECU. , +0.0,ECU. ,1275 5602,+27.0,1479,100, 60, 00, +5.8, 70.0,ECU. , +0.0,ECU. ,1369 5668,+27.0,1278,100, 60, 00, +6.8, 72.0,ECU. , +0.0,ECU. ,1424 5747,+27.2,1445,100, 60, 00, +7.9, 72.0,ECU. , +0.0,ECU. ,1533 5889,+27.0,1351,100, 60, 00, +9.0, 75.0,ECU. , +0.0,ECU. ,1650 5984,+27.2,1312,100, 70, 00, +10.3, 77.0,ECU. , +0.0,ECU. ,1440 6105,+27.2,1453,100, 70, 00, +9.5, 79.0,ECU. , +0.0,ECU. ,1474 6265,+27.0,1479,100, 70, 00, +11.4, 79.0,ECU. , +0.0,ECU. ,1408 6337,+27.0,1453,100, 70, 00, +12.8, 80.0,ECU. , +0.0,ECU. ,1396 6397,+27.0, 416, 41, 00, 00, +23.6, 35.0,ECU. , +0.0,ECU. , 168 5878,+27.0, 159, 1, 00, 00, +38.3, 8.0,ECU. , +0.0,ECU. , 46 5464,+27.0, 48, 1, 00, 00, +38.2, 5.0,ECU. , +0.0,ECU. , 50
Code:
3129,+26.6, 255, 24, 00, 00, +29.5, 9.0,ECU. , +0.0,ECU. , 259 3205,+26.6, 263, 24, 00, 00, +29.4, 10.0,ECU. , +0.0,ECU. , 263 3223,+26.6, 272, 24, 00, 00, +29.5, 10.0,ECU. , +0.0,ECU. , 280 3313,+26.8, 284, 25, 00, 00, +29.5, 11.0,ECU. , +0.0,ECU. , 301 3418,+26.8, 372, 28, 00, 00, +27.8, 13.0,ECU. , +0.0,ECU. , 388 3486,+26.8, 410, 31, 00, 00, +25.6, 16.0,ECU. , +0.0,ECU. , 453 3611,+26.8, 559, 45, 00, 00, +19.6, 21.0,ECU. , +0.0, 65.00, 632 3766,+26.8, 746, 64, 10, 00, +12.3, 29.0,ECU. , +0.0, 84.00, 615 3977,+26.6, 980, 79, 10, 00, +9.5, 38.0,ECU. , +0.0, 99.00, 796 4198,+26.8,1213, 99, 10, 00, +6.8, 48.0,ECU. , +0.0,100.00,1131 4432,+26.8,1041,100, 20, 00, +5.8, 55.0,ECU. , -0.3,100.00,1121 4694,+26.8,1256,100, 40, 00, +7.9, 55.0,ECU. , -2.7,100.00,1315 4901,+26.8,1400,100, 50, 12, +7.2, 57.0,ECU. , -5.2,100.00,1141 5200,+26.6,1243,100, 50, 12, +7.1, 59.0,ECU. , -5.5,100.00,1250 5367,+26.3,1366,100, 60, 05, +3.8, 61.0,ECU. , -8.7,100.00,1256 5649,+26.3,1329,100, 60, 00, +5.0, 65.0,ECU. , -9.9,100.00,1256 5827,+26.3,1351, 86, 70, 00, +7.4, 66.0,ECU. ,-10.7,100.00,1358 6071,+26.3,1492, 85, 70, 00, +8.6, 66.0,ECU. ,-11.4,100.00,1213 6301,+26.8,1618, 85, 70, 03, +8.5, 69.0,ECU. ,-11.8,100.00,1373 6435,+26.8,1506, 78, 80, 00, +10.2, 69.0,ECU. ,-12.4, 98.00,1275
Sep 7, 2004, 08:50 PM
#2
Since the MAF signal is being altered, the timing becomes indirectly altered because the ECU thinks there's less airflow.. Partly the reason its a good idea to also run a timing map if you make large changes to the MAF reading..
When you run a timing map, no matter how you alter your MAF reading to adjust fueling, the UTEC will control timing and will not be affected by it.
Its just the nature of how piggybacks work....
From what I can tell with my experience with the new beta firmware, the ECU's timing doesn't seem to be as affected in open loop fueling, but it still is since the modified MAF signal is still passed to the ECU even though the UTEC is driving the injectors directly (its basically to keep the ECU happy and so the ECU knows the correct enrichment point to kick the fuel pump into high output mode and other load/rpm dependent functions in the ECU)
When you run a timing map, no matter how you alter your MAF reading to adjust fueling, the UTEC will control timing and will not be affected by it.
Its just the nature of how piggybacks work....
From what I can tell with my experience with the new beta firmware, the ECU's timing doesn't seem to be as affected in open loop fueling, but it still is since the modified MAF signal is still passed to the ECU even though the UTEC is driving the injectors directly (its basically to keep the ECU happy and so the ECU knows the correct enrichment point to kick the fuel pump into high output mode and other load/rpm dependent functions in the ECU)
Sep 7, 2004, 10:48 PM
#3
Man that is scary, put the timing map back in there.. THose are some bad knock events man..
When you see that Cel flash get out of it, do you see where you were throwing 12 counts, and you just stayed in it, and threw another 12, and a 5, that means you were knocking ALOT.. You need to watch that Knock COunt row in the logs and when you see an event happen you need to figure out why it is ocuring..
When you see that Cel flash get out of it, do you see where you were throwing 12 counts, and you just stayed in it, and threw another 12, and a 5, that means you were knocking ALOT.. You need to watch that Knock COunt row in the logs and when you see an event happen you need to figure out why it is ocuring..
Sep 8, 2004, 04:45 AM
#4
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Yeah that is a lot of consecutive knock. As Spec C said once you see that CEL blink that much let off the throttle. You will want to pull timing and adjust fuel around when the knock was induced to keep it safe.
Sep 8, 2004, 04:57 AM
#5
I would think that this is too small of a sample to make any real assumptions. I would use at least a 3rd gear pull 2500-7000 to tune with. You never even hit the high load sites in those.
Sep 8, 2004, 05:46 AM
#6
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Well if you look the the TPS he did get out of it a little bit. I think the reason you are getting that much knock could be the bad gas you were talking about in your area. I am pulling fuel and advancing more timing in that area then you are and have not seen any knock like that.
Like jack said I would recommend making a timing map. If the UTEC is in control of timing then I will pull timing for you to make sure you don't get that many knock counts.
Also I in your logs you don't even get into 90 Load point and you barely get into 80. I am not sure if this is because of the knock or if you are not calibrated right. Your TPS looks fine what gear were you in when you did these pulls? 2nd?
Ben
Like jack said I would recommend making a timing map. If the UTEC is in control of timing then I will pull timing for you to make sure you don't get that many knock counts.
Also I in your logs you don't even get into 90 Load point and you barely get into 80. I am not sure if this is because of the knock or if you are not calibrated right. Your TPS looks fine what gear were you in when you did these pulls? 2nd?
Ben
Sep 8, 2004, 06:22 AM
#7
I've seen the load sites never reach over 80 in some cars with aftermarket intake pipes.. the larger pipe sizes and lowered restrictions in the filter/pipe setups can cause the airflow to slow down (showing much lower numbers)
I did think he said he had a stock airbox and whatnot.. But those numbers definitely look low for a stock airbox.
The MAX MAF value can be adjusted, or you can leave it alone for headroom and tune the lower load site columns and resolve it..
It does look like bad gas since the stock ECU is controlling timing and should be continually pulling timing, and it can't pull enough to compensate for it.
You'll likely have to drop your boost and see if the detonation goes away and the ECU (if you want to continue to use its timing) should compensate for it.. Also, that fuel map looks pretty lean if your gas quality is bad..
I did think he said he had a stock airbox and whatnot.. But those numbers definitely look low for a stock airbox.
The MAX MAF value can be adjusted, or you can leave it alone for headroom and tune the lower load site columns and resolve it..
It does look like bad gas since the stock ECU is controlling timing and should be continually pulling timing, and it can't pull enough to compensate for it.
You'll likely have to drop your boost and see if the detonation goes away and the ECU (if you want to continue to use its timing) should compensate for it.. Also, that fuel map looks pretty lean if your gas quality is bad..
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Sep 8, 2004, 07:55 AM
#8
Originally Posted by MalibuJack
I've seen the load sites never reach over 80 in some cars with aftermarket intake pipes.. the larger pipe sizes and lowered restrictions in the filter/pipe setups can cause the airflow to slow down (showing much lower numbers)
I did think he said he had a stock airbox and whatnot.. But those numbers definitely look low for a stock airbox.
The MAX MAF value can be adjusted, or you can leave it alone for headroom and tune the lower load site columns and resolve it..
It does look like bad gas since the stock ECU is controlling timing and should be continually pulling timing, and it can't pull enough to compensate for it.
You'll likely have to drop your boost and see if the detonation goes away and the ECU (if you want to continue to use its timing) should compensate for it.. Also, that fuel map looks pretty lean if your gas quality is bad..
I did think he said he had a stock airbox and whatnot.. But those numbers definitely look low for a stock airbox.
The MAX MAF value can be adjusted, or you can leave it alone for headroom and tune the lower load site columns and resolve it..
It does look like bad gas since the stock ECU is controlling timing and should be continually pulling timing, and it can't pull enough to compensate for it.
You'll likely have to drop your boost and see if the detonation goes away and the ECU (if you want to continue to use its timing) should compensate for it.. Also, that fuel map looks pretty lean if your gas quality is bad..
Jack, would it be fair to say there is a good chance he is knocking on map 0 also? I am pretty sure that the utec will not detect the knock in map 0, so i would think you may be knocking there in stock mode also.. That is a VERY sensative are in the map, you need to fix the problem..
I would get either a gal of toulene or xylene and add just enough to raise the octane to 93-94 and see if it still knocks..
Sep 8, 2004, 09:13 AM
#9
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I was under the understanding that the UTEC with detect knock as long as you are data logging. But it will only pull timing if it is in control of the timing. So it should show some knock counts if he has knock on map 0. That is if I am right. Which doesn't happen very often. 
Ben
Ben
Sep 8, 2004, 09:46 AM
#10
Quote from Utec instruction Manual:
Well obviously it does flash the CEL if the timing is set to "ECU" values, but i am pretty sure it doesnt in stock mode..
In this case i am leaning towards him knocking even in stock mode in that area.. I say this because if you look at his timing in stock mode it is pretty low in that range, seems like the ecu is pulling timing there or has some learned knock correction in that area from previous knock events..
If the UTEC is in stock mode or the programed timing is set to "ECU", the UTEC will not retard timing or flash the CEL if knock is detected
In this case i am leaning towards him knocking even in stock mode in that area.. I say this because if you look at his timing in stock mode it is pretty low in that range, seems like the ecu is pulling timing there or has some learned knock correction in that area from previous knock events..
Sep 8, 2004, 10:20 AM
#11
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Originally Posted by Spec C
Quote from Utec instruction Manual:
Well obviously it does flash the CEL if the timing is set to "ECU" values, but i am pretty sure it doesnt in stock mode..
Well obviously it does flash the CEL if the timing is set to "ECU" values, but i am pretty sure it doesnt in stock mode..
I told you it wasn't right often
But the real question is will it show the knock on the logs? It doesn't seem like it because look how much timing is being pulledCode:
5984,+27.2,1312,100, 70, 00, +10.3, 77.0,ECU. , +0.0,ECU. ,1440 6105,+27.2,1453,100, 70, 00, +9.5, 79.0,ECU. , +0.0,ECU. ,1474 6265,+27.0,1479,100, 70, 00, +11.4, 79.0,ECU. , +0.0,ECU. ,1408
What is throwing me off is if he is in stock mode why is the Mod MAF different from the stock maf reading?
That is wierd that the car would knock in stock mode. I wonder if something is making his car run lean. Maybe a intake or a messed up MAF or bad gas. I recommend getting some low lead gas from a airport or mixing in some toulene. Something to raise the octane(because of the previous complaints of bad gas). Then reset the ecu and log again and see if you get the same type of logs.
I am just kind of thinking out loud here.
Ben
Sep 8, 2004, 10:35 AM
#12
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Code:
2089,+27.0, 279,100, 10, 00, +15.0, 9.0,ECU. , +0.0,ECU. , 311 2192,+27.0, 256,100, 10, 00, +15.0, 10.0,ECU. , +0.0,ECU. , 243 2272,+27.0, 292,100, 10, 00, +15.0, 10.0,ECU. , +0.0,ECU. , 279 2334,+27.0, 261,100, 10, 00, +14.7, 11.0,ECU. , +0.0,ECU. , 300 2417,+27.0, 323,100, 10, 00, +14.7, 12.0,ECU. , +0.0,ECU. , 278 2456,+26.8, 310,100, 10, 00, +14.8, 12.0,ECU. , +0.0,ECU. , 371 2570,+26.8, 338,100, 10, 00, +15.2, 13.0,ECU. , +0.0,ECU. , 359 2606,+26.6, 349,100, 10, 00, +15.2, 14.0,ECU. , +0.0,ECU. , 409 2727,+26.8, 389,100, 10, 00, +14.5, 15.0,ECU. , +0.0,ECU. , 469 2773,+27.0, 437,100, 10, 00, +14.5, 16.0,ECU. , +0.0,ECU. , 424 2858,+27.0, 398,100, 10, 00, +13.4, 17.0,ECU. , +0.0,ECU. , 455 2934,+27.0, 529,100, 10, 00, +13.5, 18.0,ECU. , +0.0,ECU. , 519 3035,+26.8, 573,100, 10, 00, +10.3, 20.0,ECU. , +0.0,ECU. , 657 3141,+26.8, 702,100, 10, 00, +10.7, 23.0,ECU. , +0.0,ECU. , 661 3280,+27.0, 716,100, 10, 00, +7.7, 27.0,ECU. , +0.0,ECU. , 714 3394,+26.8, 747,100, 10, 00, +7.7, 31.0,ECU. , +0.0,ECU. , 644 3512,+27.0, 919,100, 10, 00, +6.7, 35.0,ECU. , +0.0,ECU. , 746 3584,+27.0, 851,100, 10, 00, +6.6, 38.0,ECU. , +0.0,ECU. ,1030 3736,+27.0,1091,100, 20, 00, +4.9, 41.0,ECU. , +0.0,ECU. , 670 3844,+27.2, 759,100, 20, 00, +4.4, 44.0,ECU. , +0.0,ECU. ,1170 3982,+27.2, 716,100, 20, 00, +4.6, 47.0,ECU. , +0.0,ECU. ,1033 4161,+27.0, 775,100, 20, 00, +4.2, 48.0,ECU. , +0.0,ECU. , 936 4208,+27.0, 818,100, 30, 00, +4.1, 48.0,ECU. , +0.0,ECU. , 988 4340,+27.0,1024,100, 30, 00, +4.9, 48.0,ECU. , +0.0,ECU. ,1024 4535,+27.0,1225,100, 40, 00, +5.0, 50.0,ECU. , +0.0,ECU. ,1173 4616,+27.0,1149,100, 40, 00, +5.1, 52.0,ECU. , +0.0,ECU. ,1187 4782,+26.8,1103,100, 40, 00, +6.5, 54.0,ECU. , +0.0,ECU. ,1228 4894,+26.8,1138,100, 40, 00, +6.5, 54.0,ECU. , +0.0,ECU. ,1240 5035,+27.0,1149,100, 40, 00, +6.6, 56.0,ECU. , +0.0,ECU. ,1196 5112,+27.0,1373,100, 40, 00, +6.0, 59.0,ECU. , +0.0,ECU. ,1315 5257,+27.0,1144,100, 50, 00, +6.3, 60.0,ECU. , +0.0,ECU. ,1116 5291,+26.8,1146,100, 50, 00, +7.1, 62.0,ECU. , +0.0,ECU. ,1179 5411,+27.0,1199,100, 50, 00, +7.0, 63.0,ECU. , +0.0,ECU. ,1269 5583,+26.8,1369,100, 60, 00, +6.4, 67.0,ECU. , +0.0,ECU. ,1322 5649,+26.8,1207,100, 60, 00, +8.6, 68.0,ECU. , +0.0,ECU. ,1385 5767,+27.0,1319,100, 60, 00, +9.7, 67.0,ECU. , +0.0,ECU. ,1340 5858,+27.0,1240,100, 60, 00, +9.7, 70.0,ECU. , +0.0,ECU. ,1392 6006,+27.0,1440,100, 60, 00, +10.7, 70.0,ECU. , +0.0,ECU. ,1351 6116,+27.0,1497,100, 60, 00, +12.1, 72.0,ECU. , +0.0,ECU. ,1449 6218,+27.0,1587,100, 70, 00, +12.4, 73.0,ECU. , +0.0,ECU. ,1416 6277,+27.0,1412,100, 70, 00, +12.2, 74.0,ECU. , +0.0,ECU. ,1396 6410,+27.0,1392,100, 70, 00, +13.9, 74.0,ECU. , +0.0,ECU. ,1369 6510,+27.0,1474,100, 70, 00, +15.5, 75.0,ECU. , +0.0,ECU. ,1355 6561,+27.0,1466,100, 70, 00, +15.4, 77.0,ECU. , +0.0,ECU. ,1582
It probably doesn't help that these pulls are in near 100 degree weather. Other than that, I've been running 91 octane from union 76 for this car's whole life. The car still looks like it's knocking (not as much) and the timing does look better.
If I reset the ECU as it is and don't run octane booster just yet, would this help any? Anyways, I'll be on my way out to buy some octane booster...
Edit- BTW, I did try to get off as fast as I could, but it was in second gear and the RPM's were flying.
Sep 8, 2004, 10:42 AM
#13
Do not run octane booster, it is not going to raise it enough. Just get a gal of toulene or xylene from your local paint store and make the octane around 93-94.. If you can get you hands on a can of torco use that..
Does anyone else have any logs of a similar modded car?
Does anyone else have any logs of a similar modded car?
Sep 8, 2004, 06:54 PM
#14
Originally Posted by Spec C
It always amazes me how the evo runs such little timing.. If i posted my timing map it would make you sick.. Also the amount my ECU(JDM Spec-c) wants to run on full boost is just disgusting.
Jack, would it be fair to say there is a good chance he is knocking on map 0 also? I am pretty sure that the utec will not detect the knock in map 0, so i would think you may be knocking there in stock mode also.. That is a VERY sensative are in the map, you need to fix the problem..
I would get either a gal of toulene or xylene and add just enough to raise the octane to 93-94 and see if it still knocks..
Jack, would it be fair to say there is a good chance he is knocking on map 0 also? I am pretty sure that the utec will not detect the knock in map 0, so i would think you may be knocking there in stock mode also.. That is a VERY sensative are in the map, you need to fix the problem..
I would get either a gal of toulene or xylene and add just enough to raise the octane to 93-94 and see if it still knocks..
What is interesting is with the load on the engine, and the low MAF reading, I would expect to see alot more timing, not the level he's seeing.. Which leads me to believe the ECU is unhappy about something, either weather conditions, the fuel, or some other environmental issue.
First thing I'd do is disconnect the battery and force the ECU to reset completely.. run the car for 15 miles normally so it can learn a little bit of the fuel trims.. Then do some logging pulls in MAP0 Third gear, 2000rpm through redline (if you can) Make a note of your boost since when the ECU detects an overboost condition it cuts fuel and pulls timing like mad..
also, check and change your plugs before you do any more tuning.. since a misfire can also show the symptoms of detonation (ecu pulls timing and adjusts fueling) but it doesn't register knock, or it does register mild knock when the plug does fire again.
Sep 8, 2004, 06:59 PM
#15
Originally Posted by MalibuJack
Yeah, if it was knocking you'd see the CEL light flash even in map0, it just doesn't attempt to alter the timing..
What is interesting is with the load on the engine, and the low MAF reading, I would expect to see alot more timing, not the level he's seeing.. Which leads me to believe the ECU is unhappy about something, either weather conditions, the fuel, or some other environmental issue.
First thing I'd do is disconnect the battery and force the ECU to reset completely.. run the car for 15 miles normally so it can learn a little bit of the fuel trims.. Then do some logging pulls in MAP0 Third gear, 2000rpm through redline (if you can) Make a note of your boost since when the ECU detects an overboost condition it cuts fuel and pulls timing like mad..
also, check and change your plugs before you do any more tuning.. since a misfire can also show the symptoms of detonation (ecu pulls timing and adjusts fueling) but it doesn't register knock, or it does register mild knock when the plug does fire again.
What is interesting is with the load on the engine, and the low MAF reading, I would expect to see alot more timing, not the level he's seeing.. Which leads me to believe the ECU is unhappy about something, either weather conditions, the fuel, or some other environmental issue.
First thing I'd do is disconnect the battery and force the ECU to reset completely.. run the car for 15 miles normally so it can learn a little bit of the fuel trims.. Then do some logging pulls in MAP0 Third gear, 2000rpm through redline (if you can) Make a note of your boost since when the ECU detects an overboost condition it cuts fuel and pulls timing like mad..
also, check and change your plugs before you do any more tuning.. since a misfire can also show the symptoms of detonation (ecu pulls timing and adjusts fueling) but it doesn't register knock, or it does register mild knock when the plug does fire again.
I wanna post a snipit of my log, you would seriously not believe the timing i can run through the tq peak let alone the timing my ecu wants to run..