azZdriver Posted August 18, 2011 Share Posted August 18, 2011 So I am trying to figure out why my car won't start. In the MS2 documentation it states: "MS2-Extra can be triggered from the negative terminal of the coil, just like MS1-Extra , as long as MS-II is not being used to control the ignition timing. However, if you are controlling the ignition timing, then the tach signal must be fixed with respect to the crank position (not vary with the advance timing like the coil signal) " I have my timing set and a fixed advance. Will I not be able to vary my advance singe I am firing the coil directly? This shouldn't keep my car from running though. Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted August 18, 2011 Share Posted August 18, 2011 What they are saying is if you are using the negative terminal of the coil as an RPM input, you can't also try to control the coil with the MS at the same time. Quote Link to comment Share on other sites More sharing options...
dexter72 Posted August 18, 2011 Share Posted August 18, 2011 Do you have an RPM Signal in Megatune?. Do you have Spark?. Do you have fuel?. Quote Link to comment Share on other sites More sharing options...
azZdriver Posted August 18, 2011 Author Share Posted August 18, 2011 Ok that makes sense now, thanks. Yes I have fuel, spark, and my rpm's are showing ~200 while cranking and my timing is set. I do not have a TPS sensor installed, so I am looking at how to install the 240sx TPS on the stock throttle body right now. Quote Link to comment Share on other sites More sharing options...
letitsnow Posted August 19, 2011 Share Posted August 19, 2011 You don't need a tps for it to run, but it's kinda nice for looking at the datalogs. Quote Link to comment Share on other sites More sharing options...
azZdriver Posted August 19, 2011 Author Share Posted August 19, 2011 Yeah I realize you don't need the TPS, just am not sure where else to go with my car, so figured I'd clean up the TB and get the sensor mounted, since I have it. Is there something major I am missing? I tried squirting starter fluid down the intake while cranking, and got nothing. So must have something wrong with the timing still ? Quote Link to comment Share on other sites More sharing options...
letitsnow Posted August 19, 2011 Share Posted August 19, 2011 (edited) Did you ever post your .msq? It does sound like a spark problem, do you have spark at the coil? plugs? It looks like it's in about the right spot with a timing light? Edited August 19, 2011 by letitsnow Quote Link to comment Share on other sites More sharing options...
azZdriver Posted August 19, 2011 Author Share Posted August 19, 2011 Did you ever post your .msq? It does sound like a spark problem, do you have spark at the coil? plugs? It looks like it's in about the right spot with a timing light? I will post my .msq up tonight, I'm at work right now. There is spark, but ironically now that the timing is set there isn't any back firing. Also tonight I will double check my coil is good, last time it showed a good resistance but that was a few weeks back. The spark plugs are brand new and covered in fuel, so I doubt it's a fuel problem unless there's way too much getting injected. Quote Link to comment Share on other sites More sharing options...
Tennesseejed Posted August 20, 2011 Share Posted August 20, 2011 This is second hand info, but might be helpful. Turn on Noise Filtering. I know a member on here who had trouble with his fuel only install triggering from coil negative. Apparently, turning on noise filtering did the trick for him. Quote Link to comment Share on other sites More sharing options...
azZdriver Posted August 20, 2011 Author Share Posted August 20, 2011 When I set my timing I found TDC by looking at my dizzy, but today when the valve cover was removed, it seems that the dizzy is incorrectly installed. When the dizzy is pointing to cylinder 6, cylinder one is in it's compression stroke. Gotta clean up my valve cover, and fix the dizzy. Quote Link to comment Share on other sites More sharing options...
letitsnow Posted August 20, 2011 Share Posted August 20, 2011 Good find! Quote Link to comment Share on other sites More sharing options...
akeboshi Posted September 3, 2011 Share Posted September 3, 2011 i did the exact same thing with the dizzy shaft as well even though i made sure to install it right when i rebulit the engine. as for the sensor i ghettorigged it by cutting off the ears on the old tps and drilling holes and bolting them on the new tps. looks bad, works good. marcus Quote Link to comment Share on other sites More sharing options...
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