evoscan knocksum = ECUknock
#1
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evoscan knocksum = ECUknock
my question is if the ECU picks up a knock, does evosan 100% of the time also says so? Or does it miss here and there.
#2
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The knock sensor, like all the other sensors, are queried by EvoScan using the MUT protocol (extremely fast).
EvoScan logs what it pulls at that time. It IS possible for the knock sensor to quickly read knock and then go back to 0 but have EvoScan not pick it up, but if your laptop & cable are fast enough and configured correctly, it should be a non-issue since they log so friggin fast.
Besides, most people here will agree that knock is only issue when it compounds over 1 or more seconds, and is 2+ or more counts. Otherwise it could be considered phantom knock.
Someone correct me if I'm wrong.
EvoScan logs what it pulls at that time. It IS possible for the knock sensor to quickly read knock and then go back to 0 but have EvoScan not pick it up, but if your laptop & cable are fast enough and configured correctly, it should be a non-issue since they log so friggin fast.
Besides, most people here will agree that knock is only issue when it compounds over 1 or more seconds, and is 2+ or more counts. Otherwise it could be considered phantom knock.
Someone correct me if I'm wrong.
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It is possible, but unlikely that you could miss a knock event.
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#11
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I'm curious about something here.
In the factory service manual, it states in "Group 13A Multiport Fuel Injection" on page 12, there is a Diagnostic Test Mode II (Increased Sensitivity) using the MUT-II scan tool.
Does anyone know the workings of this? Does it increase the scan rate of sensor logging by the scan tool - or does it do something in the ECU? The manual states:
"Change the diagnostic test mode fo the ECM to DIAGNOSTIC TEST MODE II (Increased Sensitivity)." - which would lead me to believe the ECM is increasing its baud rate.
Note, it does say that something about this being emission related trouble only...but their verbiage leaves me guessing.
In the factory service manual, it states in "Group 13A Multiport Fuel Injection" on page 12, there is a Diagnostic Test Mode II (Increased Sensitivity) using the MUT-II scan tool.
Does anyone know the workings of this? Does it increase the scan rate of sensor logging by the scan tool - or does it do something in the ECU? The manual states:
"Change the diagnostic test mode fo the ECM to DIAGNOSTIC TEST MODE II (Increased Sensitivity)." - which would lead me to believe the ECM is increasing its baud rate.
Note, it does say that something about this being emission related trouble only...but their verbiage leaves me guessing.
#13
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you could run a mains plug inverter in your car, most laptops on battery power only run at 50% cpu, with an inverter you can get more speed from your laptop and greater length of logging
and still have your fav mp3s playing without fear of the laptop battery going flat after 50minutes
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#14
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but I wouldn't worry about evoscan being slow, it is the fastest factory diagnostics on the planet
especially if you have a 2001-2005 reprogrammable baudrate ecu
if you want.. just log 5 dataitems only.. at 200samples per second thats 40 times per second per item! (Can electricity travel that fast? must be a damn fast and powerful ecu these cars have from factory) who in would ever want to upgrade to an aftermarket ecu is just mad... hehe.
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#15
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I've been looking into the VOOMPC which is a mini-ITX form factor PC. Very low power requirements, and with the correct DC-DC power supply, it simply hibernates (which only draws current to power the memory). It also is car smart, in that it monitors the charging system, and shuts down if the car battery gets too low:
http://resources.mini-box.com/online...-HV-manual.pdf
This way, there is no real boot up time. It simply comes out of hibernation when the car is started. These things are tiny, and you can run a decent laptop hard drive in there with XP slashed down to bare minimum requirements. Just mount under the seat or in the glovebox. (dimensions 8.6"W x 10.4"L x 2.6"H).
Output the video to an in-dash DVD system, and you've got a perfect system for monitoring engine health. I would stash a mini 88 key keyboard in the glovebox, and possibly mount a mini trackball next to the intercooler spray switch.
http://www.mini-box.com/s.nl/sc.8/category.101/.f
http://resources.mini-box.com/online...-HV-manual.pdf
This way, there is no real boot up time. It simply comes out of hibernation when the car is started. These things are tiny, and you can run a decent laptop hard drive in there with XP slashed down to bare minimum requirements. Just mount under the seat or in the glovebox. (dimensions 8.6"W x 10.4"L x 2.6"H).
Output the video to an in-dash DVD system, and you've got a perfect system for monitoring engine health. I would stash a mini 88 key keyboard in the glovebox, and possibly mount a mini trackball next to the intercooler spray switch.
http://www.mini-box.com/s.nl/sc.8/category.101/.f