Huge knock count during cruise
Sep 3, 2008, 06:57 PM
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Huge knock count during cruise
Code:
JDMMAP WBO2 RPM Load TPS Timing KnockSum Speed CoolantTemp AirTemp -3.37 14.413 2777.34 61.56 30.2 33 0 64.62 185 93.2 -3.18 14.084 2777.34 61.88 30.2 32 0 64.62 185 93.2 -3.37 14.276 2773.44 61.88 30.2 33 0 64.62 185 93.2 -3.57 14.496 2773.44 62.19 30.2 32 0 63.38 185 93.2 -3.57 14.276 2777.34 61.88 30.2 33 0 63.38 185 93.2 -3.37 14.221 2781.25 62.81 30.2 32 0 63.38 185 93.2 -3.18 14.386 2781.25 61.88 30.2 33 0 63.38 185 93.2 -3.57 14.468 2777.34 61.88 30.2 33 0 63.38 183.2 93.2 -3.76 14.221 2777.34 61.88 30.2 32 0 64.62 183.2 93.2 -3.37 14.249 2781.25 61.88 30.2 33 0 64.62 183.2 93.2 -3.37 14.441 2781.25 61.88 30.6 32 0 64.62 183.2 93.2 -3.37 14.276 2781.25 63.13 30.6 32 0 64.62 183.2 93.2 -3.57 14.249 2781.25 62.81 30.6 32 0 63.38 183.2 93.2 -3.37 14.468 2777.34 62.81 30.6 32 0 63.38 183.2 93.2 -3.18 14.304 2785.16 63.44 30.6 32 0 63.38 183.2 93.2 -3.37 14.358 2785.16 63.75 30.6 32 0 63.38 183.2 93.2 -3.37 14.358 2785.16 64.69 31.0 31 0 64.62 183.2 93.2 -3.18 14.304 2781.25 65.63 31.0 31 0 64.62 183.2 93.2 -2.99 14.167 2789.06 65.31 31.0 29 3 64.62 183.2 93.2 -2.79 14.331 2789.06 65.94 31.4 29 3 64.62 183.2 93.2 -3.18 14.249 2785.16 67.19 31.4 27 7 64.62 183.2 93.2 -2.79 14.167 2808.59 69.38 32.2 26 7 64.62 183.2 93.2 -2.40 14.386 2792.97 72.19 32.2 25 7 64.62 183.2 93.2 -2.21 14.304 2789.06 72.19 32.2 26 6 64.62 183.2 93.2 -2.21 13.783 2800.78 72.50 32.2 26 6 64.62 183.2 93.2 -2.21 14.167 2800.78 72.19 32.2 26 6 64.62 183.2 93.2 -2.40 14.331 2804.69 73.13 32.2 25 6 64.62 183.2 93.2 -2.40 14.358 2800.78 72.50 32.2 26 6 64.62 183.2 93.2 -2.40 14.221 2812.50 72.19 32.2 25 9 64.62 183.2 93.2 -2.40 14.386 2808.59 73.13 32.2 24 9 64.62 183.2 93.2 -2.21 14.249 2808.59 72.50 32.2 25 9 64.62 183.2 93.2 -2.21 14.276 2816.41 72.50 32.2 25 13 64.62 183.2 93.2 -2.21 14.468 2816.41 72.50 32.2 23 13 64.62 183.2 91.4 -2.21 14.249 2816.41 72.81 32.2 24 12 64.62 183.2 93.2 -2.02 14.386 2820.31 73.13 32.2 22 16 64.62 183.2 91.4 -2.02 14.194 2832.03 73.13 32.2 21 16 64.62 183.2 93.2 -2.02 14.413 2816.41 72.50 32.2 22 16 64.62 183.2 91.4 -2.02 14.276 2820.31 72.50 32.2 23 15 64.62 183.2 91.4 -2.02 14.331 2835.94 73.13 32.2 22 15 64.62 183.2 91.4 -1.82 14.413 2839.84 72.81 32.2 23 15 64.62 183.2 91.4 -1.82 14.249 2824.22 73.13 32.2 22 15 64.62 183.2 91.4 -2.02 14.413 2835.94 72.19 32.2 23 15 65.87 183.2 91.4 -2.21 14.358 2835.94 72.81 32.2 23 14 65.87 183.2 91.4 -2.21 14.331 2843.75 73.44 32.2 21 18 65.87 183.2 93.2 -2.40 14.304 2839.84 72.50 32.2 22 18 65.87 183.2 93.2 -2.40 14.468 2843.75 72.50 32.2 22 18 65.87 183.2 93.2 -2.21 14.084 2847.66 71.56 32.2 22 18 64.62 183.2 93.2 -2.02 14.276 2843.75 73.13 32.2 21 17 64.62 183.2 93.2 -2.02 14.413 2843.75 72.19 32.2 22 17 64.62 183.2 93.2 -2.21 14.276 2851.56 71.56 32.2 22 17 64.62 183.2 93.2 -2.21 14.441 2847.66 72.19 32.2 21 21 65.87 183.2 93.2 -2.40 14.221 2859.38 71.25 32.2 19 26 65.87 183.2 93.2 -2.40 14.167 2855.47 72.81 32.2 18 29 65.87 183.2 93.2 -2.21 14.441 2855.47 72.19 32.2 18 29 65.87 183.2 93.2 -2.02 14.084 2863.28 72.19 31.8 18 29 65.87 183.2 93.2 -2.21 14.167 2855.47 72.81 31.8 18 29 65.87 183.2 93.2 -2.21 14.304 2871.09 72.19 31.8 16 34 65.87 183.2 93.2 -2.40 14.276 2871.09 71.56 31.8 16 33 65.87 183.2 93.2 -2.40 14.441 2867.19 72.50 32.2 15 36 65.87 183.2 93.2 -2.02 14.221 2859.38 72.50 31.8 15 36 65.87 183.2 93.2 -2.21 14.304 2875.00 72.81 31.8 14 36 65.87 183.2 93.2 -2.40 14.413 2863.28 73.13 31.8 14 36 65.87 183.2 93.2 -2.21 14.249 2863.28 72.81 31.8 16 35 65.87 183.2 93.2 -2.02 14.276 2871.09 73.13 31.8 15 36 65.87 183.2 93.2 -2.21 14.358 2863.28 71.88 31.8 15 36 65.87 183.2 93.2 -2.40 14.386 2875.00 72.19 31.8 15 36 65.87 183.2 93.2 -2.02 14.221 2867.19 72.81 31.8 14 36 65.87 183.2 93.2 -2.21 14.386 2871.09 72.19 31.8 16 35 65.87 183.2 93.2 -2.40 14.249 2875.00 72.50 31.8 16 35 65.87 183.2 93.2 -2.21 14.194 2871.09 72.50 31.8 16 35 65.87 183.2 93.2 -2.02 14.386 2871.09 72.19 31.8 16 35 65.87 183.2 93.2 -2.21 14.249 2867.19 72.19 31.8 15 36 65.87 183.2 93.2 -2.40 14.413 2871.09 72.19 31.8 15 36 67.11 183.2 93.2 -2.40 14.249 2875.00 72.19 31.8 15 36 67.11 183.2 93.2 -2.02 14.331 2871.09 70.94 31.8 15 36 67.11 183.2 93.2 -2.21 14.304 2871.09 72.19 31.8 16 36 67.11 183.2 93.2 -2.40 14.386 2875.00 71.56 31.8 16 35 65.87 183.2 93.2 -2.40 14.221 2863.28 72.50 31.8 16 35 65.87 183.2 93.2 -2.21 14.413 2875.00 71.56 31.8 15 36 65.87 183.2 93.2 -2.21 14.249 2867.19 71.56 31.8 15 36 65.87 183.2 93.2 -2.21 14.167 2863.28 71.88 31.8 15 36 65.87 183.2 93.2 -2.40 14.413 2867.19 71.88 31.8 16 35 65.87 183.2 93.2 -2.21 14.221 2867.19 71.88 31.8 16 35 65.87 183.2 93.2 -2.21 14.304 2863.28 71.56 31.8 16 35 65.87 183.2 93.2 -2.40 14.358 2863.28 71.56 31.8 15 36 65.87 183.2 93.2 -2.40 14.276 2875.00 71.56 31.8 15 36 65.87 183.2 93.2 -2.21 14.468 2859.38 71.56 31.8 16 35 65.87 183.2 93.2 -2.02 14.221 2859.38 72.19 31.8 16 35 65.87 183.2 93.2 -2.21 14.331 2867.19 71.56 31.8 16 35 65.87 183.2 93.2 -2.40 14.358 2859.38 72.19 31.8 15 36 65.87 183.2 93.2 -2.40 14.249 2851.56 72.50 31.8 15 36 65.87 183.2 93.2 -2.40 14.386 2859.38 72.19 31.8 16 35 65.87 183.2 93.2 -2.21 14.386 2863.28 71.88 31.8 15 36 65.87 183.2 93.2 -2.02 14.413 2855.47 71.56 31.8 15 36 65.87 183.2 93.2 -2.02 14.194 2851.56 71.56 31.8 15 36 65.87 183.2 93.2 -2.21 14.441 2855.47 71.56 31.8 16 35 65.87 183.2 93.2 -2.40 14.358 2859.38 71.56 31.8 16 35 65.87 183.2 91.4 -2.40 14.194 2859.38 71.56 31.8 16 35 65.87 183.2 91.4 -2.40 14.413 2855.47 71.56 31.8 16 35 65.87 183.2 91.4 -2.21 14.249 2843.75 72.19 31.8 16 35 65.87 183.2 91.4 -2.21 14.358 2859.38 70.94 31.8 16 34 65.87 183.2 91.4 -2.21 14.468 2851.56 71.25 31.8 16 34 65.87 183.2 91.4 -2.40 14.276 2851.56 71.56 31.8 16 34 65.87 183.2 91.4 -2.60 14.304 2855.47 71.25 31.8 16 34 65.87 183.2 91.4 -2.40 14.276 2847.66 70.94 31.8 15 36 65.87 183.2 91.4 -2.21 14.221 2859.38 70.94 31.8 16 35 65.87 183.2 91.4 -2.21 14.386 2855.47 70.31 31.8 16 35 65.87 183.2 91.4 -2.40 14.331 2847.66 71.56 31.8 16 35 65.87 183.2 91.4 -2.40 14.413 2855.47 70.63 31.8 15 36 65.87 183.2 91.4 -2.40 14.331 2847.66 71.56 31.8 15 36 65.87 183.2 91.4 -2.60 14.386 2851.56 70.94 31.8 16 35 65.87 183.2 91.4 -2.60 14.304 2851.56 70.63 31.8 16 35 65.87 183.2 93.2 -2.60 14.331 2847.66 70.31 31.8 16 35 65.87 183.2 93.2 -2.21 14.249 2843.75 70.94 31.8 16 35 65.87 183.2 93.2 -2.21 14.276 2839.84 70.31 31.8 16 34 65.87 183.2 93.2 -2.40 14.413 2843.75 70.63 31.8 16 34 65.87 183.2 93.2 -2.60 14.468 2847.66 70.31 31.8 16 34 65.87 183.2 93.2 -2.60 14.276 2839.84 71.56 31.8 16 34 65.87 183.2 93.2 -2.60 14.112 2847.66 69.69 31.8 17 34 64.62 183.2 93.2 -2.40 14.304 2851.56 71.25 31.4 16 33 64.62 183.2 93.2 -2.21 14.441 2843.75 70.63 31.4 16 33 64.62 183.2 93.2 -2.40 14.276 2843.75 70.63 31.8 16 33 64.62 183.2 93.2 -2.40 14.194 2847.66 70.31 31.4 16 33 65.87 183.2 93.2 -2.60 14.413 2839.84 71.25 31.4 16 33 65.87 183.2 93.2 -2.60 14.304 2843.75 69.69 31.4 17 32 65.87 183.2 93.2 -2.60 14.413 2855.47 70.00 31.4 17 32 65.87 183.2 93.2 -2.40 14.084 2847.66 70.00 31.4 17 32 65.87 183.2 93.2 -2.40 14.386 2843.75 69.69 31.4 17 32 65.87 183.2 93.2 -2.40 14.386 2859.38 69.69 31.4 17 32 65.87 183.2 93.2 -2.40 14.413 2851.56 70.00 31.4 16 35 65.87 183.2 93.2 -2.60 14.304 2847.66 69.38 31.4 16 35 65.87 183.2 91.4 -2.79 14.249 2851.56 69.38 31.4 16 35 65.87 183.2 93.2 -2.79 14.358 2851.56 70.00 31.4 16 35 65.87 183.2 91.4 -2.60 14.358 2851.56 69.06 31.4 16 35 65.87 183.2 91.4 -2.40 14.249 2855.47 68.44 31.4 17 34 65.87 183.2 91.4 -2.40 14.331 2859.38 69.38 31.4 17 34 65.87 183.2 91.4 -2.60 14.276 2847.66 68.44 31.4 16 36 65.87 183.2 91.4 -2.79 14.358 2855.47 68.44 31.4 16 36 65.87 183.2 93.2 -2.79 14.221 2851.56 68.75 31.4 16 36 65.87 183.2 93.2 -2.99 14.331 2855.47 68.44 31.4 16 35 65.87 183.2 93.2 -2.60 14.276 2859.38 68.75 31.0 16 35 65.87 183.2 93.2 -2.60 14.276 2863.28 67.81 31.4 16 36 65.87 183.2 91.4 -2.79 14.386 2859.38 67.50 31.0 16 36 65.87 183.2 93.2 -2.99 14.413 2859.38 67.50 31.0 17 34 65.87 183.2 93.2 -2.79 14.276 2863.28 67.50 31.0 16 36 65.87 183.2 93.2 -2.60 14.413 2863.28 66.56 31.0 18 32 65.87 183.2 93.2 -2.79 13.920 2863.28 66.25 31.0 23 16 65.87 183.2 93.2 -2.99 14.386 2867.19 66.25 31.0 29 0 65.87 183.2 93.2 -3.18 14.468 2875.00 65.31 31.0 31 0 65.87 183.2 93.2 -2.99 14.304 2867.19 65.63 31.0 31 0 65.87 183.2 93.2 -2.79 14.441 2875.00 65.31 31.0 31 0 65.87 183.2 93.2 -3.18 14.304 2871.09 65.94 31.0 31 0 65.87 183.2 93.2 -3.18 14.331 2878.91 64.69 31.0 32 0 65.87 183.2 93.2 -2.99 14.386 2871.09 65.31 31.0 31 0 65.87 183.2 93.2 -2.99 14.386 2882.81 64.69 31.0 31 0 65.87 183.2 93.2 -3.37 14.112 2886.72 64.38 31.0 33 0 65.87 183.2 93.2 -2.99 14.358 2886.72 64.69 31.0 32 0 67.11 183.2 93.2 -3.18 14.413 2878.91 65.00 31.0 32 0 67.11 185 93.2 -3.37 14.276 2890.63 64.38 31.0 33 0 67.11 185 93.2 -2.99 14.221 2894.53 63.75 31.0 33 0 67.11 185 93.2 -3.37 14.413 2890.63 64.69 31.0 32 0 67.11 183.2 93.2 -3.37 14.358 2902.34 64.06 31.0 33 0 65.87 183.2 93.2 -3.18 14.112 2898.44 64.69 31.0 33 0 65.87 183.2 93.2 -3.57 14.304 2902.34 62.81 30.6 33 0 65.87 183.2 93.2 -3.18 14.084 2910.16 63.44 30.6 33 0 65.87 183.2 93.2 -3.37 14.358 2906.25 63.44 30.6 33 0 67.11 183.2 93.2 -3.18 14.386 2914.06 63.44 30.6 33 0 67.11 183.2 93.2 -3.57 14.030 2921.88 63.13 30.6 33 0 67.11 183.2 93.2 -3.18 14.331 2917.97 63.44 30.6 33 0 67.11 183.2 93.2 -3.57 14.441 2921.88 65.63 30.6 32 0 67.11 183.2 93.2 -3.18 14.167 2925.78 63.44 30.6 33 0 67.11 183.2 93.2 -3.76 14.057 2925.78 62.50 30.6 33 0 67.11 183.2 93.2 -3.57 14.276 2933.59 62.81 30.6 33 0 67.11 183.2 93.2 -3.76 14.358 2937.50 61.88 30.6 33 0 67.11 183.2 93.2 -3.76 14.441 2945.31 61.56 30.6 33 0 67.11 183.2 93.2 -3.37 14.249 2941.41 61.88 30.6 34 0 67.11 183.2 93.2 -3.57 14.194 2945.31 61.56 30.6 34 0 67.11 183.2 93.2 -3.76 14.331 2957.03 61.56 30.6 34 0 68.35 183.2 93.2
Sep 3, 2008, 07:08 PM
#5
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WOW. judging by that i would have to say that is an inacurate reading. as Tephra said your ecu should have pulled timing and added fuel which it did not. Check ur knock sensor
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Sep 3, 2008, 07:22 PM
#8
That's exactly what his log looks like to me. 36 counts of knock is the max knock count, so the ECU can't pull anymore knock according to the knock count algorithm, at least.
Looking at the last colum of 0 knock, he's at 65 load and 31* of timing. Go down to one of the columns with 36 counts of knock...there is one he is at about 70 load (should be roughly the same column, maybe a couple degrees off, depending on his map) and he is at 15* timing. That's 16* being pulled. Roughly 12 for the 36 counts of knock and roughly 4 for the EGR advance and/or variance in map cell.
Everything seems to add up OK to me...I don't know where you guys don't see timing being pulled.
Eric
Last edited by l2r99gst; Sep 3, 2008 at 07:26 PM.
Sep 3, 2008, 07:32 PM
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I have the patch but I had the load set to 80 so it didn't show up, I has just filled up with 93 octane. The WOT pulls also in the log show no knock so I don't know.
Sep 3, 2008, 08:18 PM
#11
All it has is it's algorithm for the roughly 1* for 3 counts and then the octane value for interpolation to the low octane maps. And then a few degrees for EGR advance. There may be other routines that we don't know about yet, but from what we know, his logs seems to correlate well.
As to what his actual problem is, I don't know. Anytime I see 36 counts of knock, especially during cruise, I tend to lean towards phantom knock. But, real knock isn't out of the question. You have to test to see.
Eric
Sep 3, 2008, 08:22 PM
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I think you are used to seeing timing like that at peak boost where your maps may only be calling for a couple of degrees. You have to take into account that during cruise, his timing was calling for timing in the 30*+ range. The ECU isn't going to pull 40* of timing.
All it has is it's algorithm for the roughly 1* for 3 counts and then the octane value for interpolation to the low octane maps. And then a few degrees for EGR advance. There may be other routines that we don't know about yet, but from what we know, his logs seems to correlate well.
As to what his actual problem is, I don't know. Anytime I see 36 counts of knock, especially during cruise, I tend to lean towards phantom knock. But, real knock isn't out of the question. You have to test to see.
Eric
All it has is it's algorithm for the roughly 1* for 3 counts and then the octane value for interpolation to the low octane maps. And then a few degrees for EGR advance. There may be other routines that we don't know about yet, but from what we know, his logs seems to correlate well.
As to what his actual problem is, I don't know. Anytime I see 36 counts of knock, especially during cruise, I tend to lean towards phantom knock. But, real knock isn't out of the question. You have to test to see.
Eric
Sep 3, 2008, 09:21 PM
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the almost same exact thing happened to me. i would get crazy amounts of knock while crusing. it didnt happen when i was accelerating or at wot only when i would stay at a steady speed. i didnt worry about it for a while, then it started getting really bad and making a popping sound and got a lil jerky almost like a misfire or something so i started looking more into it couldnt find anything wrong then i was taking my air filter off to clean it one day and noticed the screen in the MAF was all messed up and out of position. so i decided to go with a blow-thru set up and it went away completly. i dont know how the heck it was causing the knock but its been about 3-4 months and it hasnt happened one time since the new blow-thru setup so u might want to put that on your list of things to check....
