Changes by last author:
Changed:
| 14-5-12 |
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15-5-12
found http://www.vemssupport.com/forum/index.php/topic,1625.15.html |
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What causes individual spark test to pass, but then no spark while cranking?
***I have read bad triggers cause no spark, but as far as I can tell my trigger logs are correct... |
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which should help immensely in my cam-sync endeavor
14-5-12 |
| car runs wasted spark, strobed cyl 1 and chalk marked cyl 1 tdc on trigger wheel...FTT of 0 and TDC after trigger of 72 was off, 67 degrees TDC after the trigger with First trigger tooth set to 3 is spot on. This is BMW vanos 60-2 wheel, cyl 1 TDC mark comes around 5-6 teeth to the right of the prim trigger (324 degrees moving counterclockwise from missing tooth) |
| ***Try firing order 5-3-6-2-4-1 (stock is 1-5-3-6-2-4 but cylinder 2&5 TDC is first to pass primary trigger sensor) |
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***Try firing order 3-6-2-4-1-5 (stock is 1-5-3-6-2-4 but cylinder 3&4 TDC is first to pass primary trigger sensor)
--wasted spark will be 3,4-1,6-2,5 (from bottom to top, and repeated) |
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***One more thing: Can anyone confirm whether or not p259's stay on during cranking if set to minimum rpm of 0? ***I found vems.co.uk/forum post from 2007 saying to invert the output and raise min rpm to above max engine speed; seems unfortunate if is still the case (power to coils,injectors, etc whenever ignition switched to on)? |