billr wrote:Clarify some things for me, so I can follow along better; maybe even help:.
1) Are the crank and cam trigger-wheels truly in separate areas, one turning at crank speed (you mentioned the flywheel) and one at cam speed?Yes. crk is located in stck position on flywheel, while cam is located (Only one on VK56) rear of left cyl. head.
2) Have we established that both sensors are Hall, and "gear-tooth" type, not
"vane" type?It has been established through a lot of my trial n error that YES indead the sensors are as post 24 [taken from megamanual] shows a HALL / VR TYPE sensor. it shows patterns from my standalone 2ch. oscillascope in above pictures. You can see the cam's 1-3-4-2 pattern that Nissan usessuperimposed onto the 36-1-1 (or 17 teeth per 180* with a missing tooth totalling 36 teeth including the 2 missing teeth 180deg. separated.
3) Are the scope traces shown in the post of 4/16/12 from a stand-alone scope, or are those derived and displayed via TS or MLV (in some way that I don't know yet!)?I have only been able to capture once a TS that would work for James, but, it didn't log. by the time I had the log working they were unread-able like James said. I bring along my laptop oscope to read the sensors now- I will try to adjust the hysterious as mentioned earlier to "clean-up" the low voltage cam signal as the screenshots show it being above.
4) Are the crank and cam sensors, and their trigger-wheels, all OEM stock; including mounting and location?
5) Has this engine ever
run successfully with this crank/cam sensor set-up, with MS or some other ECM?I have replacement sensors from factory...this is all I have & want to use since my final goal is to have a decoder, or A megasquirt option sequential or not for the VK56 V8 motor. It is an outstanding motor at an affordable price compared to crate motors when bought 2nd hand.
Forgive me if some of that has already been covered in the thread. I did
go through it, but may have missed or not understood something. Point is, of course, that we must
figure out why your crank and cam signals are crappy, especially the crank.Any extra help is appreciated-I feel alone as it is here in another country trying to get this thing ready for the GOBI desert race. I need to find out why the TS isn't showing my patterns, but my oscope is! I'm using 3 laptops with licensed TS' so redundant backup to see if its a laptop problem, or ecu problem. I also built 2 well functioning V3.0 MS boards setup for steppermotor(another unresloved issue) have the daughter card w/ latest firmware operating well with all my stims,( the standardV2.21 / my 555 stime, and a programmable stim that simulates the VK56 motor's sensors; and, the MSEXTRA board w/ seq attachment.