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| MazdaSpeed 3/6 - ECU Computer Tuning Have an ECU tuning issue? Do you want to discuss Mazdaspeed 3/6 tuning solutions? Up to date info on the latest! Piasini Reflash, Cobb Access Port, Xede, Procede, Standback, Superchips & others supported here! |
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09-08-2008, 12:35 PM
| #1 |  |
| Senior Member  Join Date: Jun 2008
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|  Anyone get random/false knock readings? This has happened to me a few times now. About 5-10 minutes after startup I would be driving at minimal throttle (very far from boost) and all of a sudden I'd get a crazy spike in KR readings on my Dashhawk. I've seen anywhere from 4 to 7 degrees. It catches me by surprise since in all of these cases I am not accelerating at all. Just cruising with very small throttle input. The spike lasts a little bit and then is never to be seen again for that trip. Anyone else see this? Thanks! | ||||||||
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09-08-2008, 12:42 PM
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| Senior Member  | i have yes just crusing on the stock tune more so if it was damp out
__________________ Piasini Tuned  power mods=SRI/Autoexe TMIC 287whp/315 tq @17.5psi |
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09-08-2008, 12:43 PM
| #3 | |
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09-08-2008, 12:49 PM
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| Zoom, pshoo, pop, Zoom...  | Yeah, I've been getting the same thing... At part throttle (light throttle) I've seen Knock spike at 6.0 out of no where, then slowly decrease to 5.5, 5.0, 4.5...to 2.0; this happens between 2,000 and 4,000 rpm. And I'm not even in boost and if I am, its less than 5 PSI. I think this is referring to as the open/close transition. Where some people with big turbos have grenaded their engines. I think CP-E is working on "fixing" this issue with their Flash. Is this bad/risky for the health engine? |
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09-08-2008, 12:50 PM
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| Senior Member | i think its just a random retard in the advance for whatever reason i never payed it to much attention it only happend at random times .....
__________________ Piasini Tuned power mods=SRI/Autoexe TMIC 287whp/315 tq @17.5psi |
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09-08-2008, 12:52 PM
| #6 | |
| Senior Member |
__________________ Piasini Tuned power mods=SRI/Autoexe TMIC 287whp/315 tq @17.5psi | |
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09-08-2008, 12:52 PM
| #7 | |
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| It's nearly impossible to get knock at so little load. This leads me to believe that the KR variable is not directly linked to the knock read form the sensor itself. I think the KR variable is based on an algorithm that takes into account more than what it reads from the sensor. | ||||||||
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09-08-2008, 12:55 PM
| #8 | |
| Senior Member |
__________________ Piasini Tuned power mods=SRI/Autoexe TMIC 287whp/315 tq @17.5psi | |
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09-08-2008, 01:05 PM
| #9 | |
| Speed6 Enthusiast  | yeah i get this too. like today right when i pushed the clutch in to shift i noticed it went from 0 to 1.8 degrees of knock retard. i have a stiffer engine mount and i believe that the added vibration from this may cause a few misreads from the knock sensor. |
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09-08-2008, 03:02 PM
| #10 | |
| Zoom, pshoo, pop, Zoom... | I was just suggested to use octane booster for a week to see if the Knocking disappears. If it doesn't, then you can suspect its false readings. I wonder whats the best octane booster out there? |
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