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Old 07-05-2015, 07:28 PM   #1
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Default sync loss ms2 1.8nb

Hi Ive got a sync loss error at around 3000 rpm intermittent and some time 5k on throttle I've took a composite log and here's the screenshot
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sync loss ms2 1.8nb-80-20150705_180906_27053642286d8a81e03f770c2e5411e1f6721a1f.jpg  
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Old 07-06-2015, 01:44 PM   #2
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Please post the actual CSV file.
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Old 07-06-2015, 08:10 PM   #3
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hi yeah here it is
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File Type: csv 2015-07-05_16.56.54.csv (3.75 MB, 37 views)
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Old 07-07-2015, 11:01 AM   #4
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Try turning off all noise filtering.
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Old 07-07-2015, 12:42 PM   #5
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Noise filtering is turned off heres my msq
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File Type: msq CurrentTune.msq (109.4 KB, 60 views)

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Old 07-09-2015, 08:59 AM   #6
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Bump
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Old 07-13-2015, 05:26 PM   #7
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Any chance you've got the actual cam timing off a little?
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Old 07-13-2015, 06:50 PM   #8
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Never touched it was fine before megasquirt
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Old 08-06-2015, 09:06 AM   #9
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Bump still got issues thinking of putting a 10ohm resistor on cam circuit
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Old 08-06-2015, 02:19 PM   #10
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We know youre running an MS2 cpu/firmware, but what exact MS do you have?
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Old 08-18-2015, 06:20 PM   #11
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diy kit from diy auto tune running extra 3.3.3
find enclosed datalog page 96/97 sync loss occurs
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File Type: csv 2015-08-13_18.41.34.csv (1.26 MB, 28 views)
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Old 08-19-2015, 10:55 AM   #12
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Do you have ignition input capture set to rising or falling edge?
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Old 08-19-2015, 12:01 PM   #13
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Rising i think if i choose the other it misfires constantly
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Old 08-19-2015, 05:43 PM   #14
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Right so ive just gapped my plugs to .8 they r ngk bkr7e 11 so colder than standard. Also removed crank sensor and cleaned end of metal fillings refit and set gap about a credit card thickness and its still got the problem help me before i take the megasquirt out remove the cam circuit and optoisolator and replace with new parts
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Old 08-19-2015, 06:28 PM   #15
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Also the ecu is wired in parallel with standard ecu sharing the cam and crank input when I wired it in the crank wire white wire is to the crank sensor and the negative black wire is not connected should it be connected? Also thinking about putting a small 5/10 ohm resistor to suppress voltage spikes if its that causing it
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Old 08-20-2015, 07:56 PM   #16
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Right a little update ive just replaced the 2nd opto circuit in the ms2 with new parts and its still the same does seem to drive a bit better tho but maybe placebo effect so its a sync loss around 3k rpm cruising and if im flat out in boost does it about 5krpm with a bang and a flame and a very violent jerk
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