MSPNP Base timing issues??
#1
MSPNP Base timing issues??
Hey guys, I'm very new to the forum here and really need some help. A few days ago I finally picked up a MSPNP and was more than excited to start work on the turbo build. so on the stock ECU I verify my timing and start in on pulling the fuse and running my MAP sensor line through the firewall. I get everything plumbed up and fire up my laptop to set base timing. To start I noticed my AFR is reading about .5 higher on the megasquirt than on my MTX-L gauge. but I continue. I change it to fixed timing to verify my base timing and go to start it. it starts idling barely and super rough. AFR is about 11 maybe 11.5. Not a good start. I go check my timing and the mark isn't even on the plastic timing cover protrusion. So I go in and advance the timing and go back out and my notch hasn't moved?? So I fiddle some more and it will either not move my timing mark or if I increase the timing too far it just dies and wont restart... Ill be honest, I'm no pro at this tuning thing. but I know my way around so i figured I could figure it out. I've watched a few videos and done some searching but after 3 days of trial and error I just cant for the life of me figure out whats wrong.
#4
Alright so I go into tuner studio and click ignition settings then I have fixed advanced set to (fixed timing) then I'm using the trigger angle offset to adjust the timing until I see the mark start to advance or retard on the crank pulley. Without adjusting my mark is before the TDC mark on the cover. Also here is a pic of tuner studio. I had to swap back to my stock ecu to get to work this morning.
#14
Yes. Between rotating the CAS and adjusting the Trigger offset you should be able to get it to the 10 degree mark that it's "fixed" to. Is this a 1.8 in a 1.6 car by chance? It was forever ago, but I seem to remember my initial base timing settings being way off due to the different cam sensor orientation between the 2 motors.
#17
So I did both of those. rotating the CAS helps but I can only go so far. On tuner studio is +/-1 on trigger angle offset = to +/-1 degree of timing? I guess I just need more trial and error but I'm just trying to find a rhyme or reason to my changes to help me reason and problem solve.
Definitely do this. If you haven't replaced your OE pulley, I'd probably just buy a new OE one, or SM, or ATI. I had one slip, I found TDC with a rod, and made a new mark. Every time I shut the engine off, the inertia was enough to spin the pulley again. Scary.
#18
Alright. So I verified that the mark was in fact TDC. I'm about to go down and start messing with it again. unfortunately since I didn't get things sorted out I had to put the stock ECU back in to get to and from work. I thank you all for the help and I hope I can get this taken care of this morning. Also a side question, how good is the base map for running a stock miata? Can I just run it exactly the same assuming I can figure out this crap timing stuff? And how about the auto tune function? Does it work pretty well assuming I set my timing and AFR tables appropriately? I live in Colorado and I'm having a hard time finding a good tuner for megasquirt and I'd like to turbo soon. I have all the parts just trying to button up MS so i can put it all together.