PITA_Z Posted April 14, 2011 Share Posted April 14, 2011 I managed to get an RPM signal and attempted to start. I haven't got good settings yet, but first what concerns me is during cranking the RPM spiked from 0 to 1436 then down to around 110 ish. As a result it assumes it's running while cranking. What would the cause of this be? If I had wired up the CAS incorrectly, would it still read a signal at all? 2011-04-14_17.38.36.zip Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted April 14, 2011 Share Posted April 14, 2011 Best way to deal with a burst of noise right while cranking is to increase Skip Pulses. Quote Link to comment Share on other sites More sharing options...
BLOZ UP Posted April 14, 2011 Share Posted April 14, 2011 What car/engine is this? What are you trigger settings? Quote Link to comment Share on other sites More sharing options...
PITA_Z Posted April 15, 2011 Author Share Posted April 15, 2011 (edited) It's an N/A 280zx with 81zxt ignition (pulley mounted CAS). MS2 v3.0 with 3.1.0 extra code. Using Bosch GT40T with power transistor from 81zxt. Ignition Settings So I'll try to change skip pulses to 5 or 6 I guess and get back. Edited April 15, 2011 by PITA_Z Quote Link to comment Share on other sites More sharing options...
BLOZ UP Posted April 15, 2011 Share Posted April 15, 2011 Pulley CAS? Why's your trigger offset 0? Quote Link to comment Share on other sites More sharing options...
PITA_Z Posted April 15, 2011 Author Share Posted April 15, 2011 At the time, didn't know quite what to put in there, just concerned with getting any trigger signal. Now I have a fair idea and will do it next time I get a chance to go out. Thanks. Quote Link to comment Share on other sites More sharing options...
BLOZ UP Posted April 15, 2011 Share Posted April 15, 2011 If it's cam spun, try 60. Quote Link to comment Share on other sites More sharing options...
PITA_Z Posted April 18, 2011 Author Share Posted April 18, 2011 I followed Tony D's info for the same setup with the 72* rotated pulley, with the 120degree tooth just past the sensor (mine isn't as far past the sensor as his so i put 110* rather than 120* like his) (two or three 4* teeth less than his it seems) I went out and had a couple more attempts to start, and the RPM spiking still happens (seems not as high since the changes, or could be a result of lower battery charge from start attempts?) Last attempt left it's mark around 1100-1200 RPM on the gauge. I had changed the Skip Pulses to 5. In my log I posted, the dwell is around 12-13 when the RPM is settling down to 110~. Too high, right? My dwell settings are.. Max Dwell Duration: 3.1 Acceleration Compensation: 1 Maximum Spark Duration: 0.1 Also, is the 110 or so RPM a normal speed for cranking? Thanks Quote Link to comment Share on other sites More sharing options...
BLOZ UP Posted April 18, 2011 Share Posted April 18, 2011 kinda slow. Quote Link to comment Share on other sites More sharing options...
PITA_Z Posted April 19, 2011 Author Share Posted April 19, 2011 The RPM spike is gone now, I must have not burned the change to Skip Pulses. Anyway, I believe I'm getting closer... learning more as I go, but yet to get past just cranking. The engine isn't even trying to catch and start running. I can smell the fuel, and I assume it's sparking now though I will still check that next time I go out there. The Timing seems correct at the moment (10* while cranking @ 110~ RPM) I'd be appreciative to have someone look over my tune & log and point out anything wrong Tune & Log.zip Pic of the Log inside the zip file: Thanks. Quote Link to comment Share on other sites More sharing options...
PITA_Z Posted April 20, 2011 Author Share Posted April 20, 2011 Had a bad ignition module, swapped out for another crappy one and saw some sparks when grounding the coil wire. After the change, cranking timing rose about 4degrees & RPM rose to around 130~ average. Now I find my injectors aren't even firing.. Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted April 20, 2011 Share Posted April 20, 2011 Do the MS injector outputs work on a Stim? Quote Link to comment Share on other sites More sharing options...
PITA_Z Posted April 20, 2011 Author Share Posted April 20, 2011 I don't have a Stim board. Quote Link to comment Share on other sites More sharing options...
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