Nismo280zEd Posted January 26, 2010 Share Posted January 26, 2010 I'm by far no Megasquirt master as I'm currently working through issues on a 911 install. But using a wideband to try and get your car running? Just take it out before it gets ruined. Reserve the wideband for when it's running ok and you need to fine tune. You need to go through the basics. Engines require fuel, air, spark to run. Confirm you are getting fuel first. Fuel pump is working correctly, pressure is ok, don't have a clogged filter, etc. Confirm you are getting air (make sure you tb is open enough to allow air to get the car to idle) Spark, pull a plug, lay it on the valve cover and turn it over. Confirm the plug is firing a good clean spark when it is supposed to. If your timing is off then your never going to fire the car. When first trying to get my Z running I was firing during the exhaust stroke, make sure your sparking when fuel is actually in the cylinder being compressed. (simple but easy to overlook) If you have all three of those, it's just a matter of doing a calculated VE table using the computer and setting up the initial settings via calculations. Another simple thing is to check your vacumn lines. I spent 3 nights beating myself up trying to start my car before I realized I had a check valve on the wrong way on a line, allowed me to start the car but as soon as I gave it gas it would die and wouldn't want to start again. (simple stupid mistakes) Best of Luck! -Ed Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 26, 2010 Author Share Posted January 26, 2010 Yeah I'm definitely going to try and start at the very basics when I get home. Could it be that I'm having starting issues because it is cold and I have only a 5 degree advance during cranking? I wouldn't think so but at this point...who knows! Regardless of rich or lean, the car should start momentarily then die, correct? Thanks for all the help guys, appreciate everything. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted January 26, 2010 Share Posted January 26, 2010 Post your megasquirt settings file (.msq) so we can all look at it. I want to see what you have for required fuel, priming, ASE, WUE and VE table. Tell us what code you are running (MSNS_extra, hi_res, what version) Quote Link to comment Share on other sites More sharing options...
FlatBlack Posted January 26, 2010 Share Posted January 26, 2010 Oh trust me, I have been using a timing light guys. Well you're obviously doing something wrong. If you are not going to try what we suggest, why are you asking for help? This is from that thread I posted: Are you using the '83 dizzy? Try rotating it all the way counter clockwise and using a 55deg trigger angle with 6.0, 3.5, and .1 for dwell settings, I got those from the megamanual. This is what I'm using and the car fires right up. Here's my msq, it only goes up to 100kpa so don't drive it without changing the ve and spark table(if it works). You can play around with the trigger angle [+ or - some] to try to dial it in if it is really close to starting or is idling rough. Quote Link to comment Share on other sites More sharing options...
letitsnow Posted January 27, 2010 Share Posted January 27, 2010 I can't promise that the slots are all the same length, but it should be close. If you have a timing light, use that. Try using 10deg cranking. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 27, 2010 Author Share Posted January 27, 2010 Okay guys, here is something interesting. I pulled a plug and layed it on my manifold and also tested this with the timing light. Quote Link to comment Share on other sites More sharing options...
letitsnow Posted January 27, 2010 Share Posted January 27, 2010 Make sure that the rotor is centered on one of the posts in the cap, also, post your dwell settings. Quote Link to comment Share on other sites More sharing options...
naviathan Posted January 27, 2010 Share Posted January 27, 2010 I'm willing to bet your lack of spark is due to the plugs being horribly fouled. Get a new set of copper NGK plugs and test for spark again. If you're still getting that sporadic spark signal then there's something wrong with your connection to trigger. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 27, 2010 Author Share Posted January 27, 2010 Dwell settings attached. Megasquirt is receiving a tach signal, just torched the plugs to clean them, going to see if I had any luck. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 27, 2010 Author Share Posted January 27, 2010 Just went out and pulled a plug from a different car that runs and tried it....no spark whatsoever now. I did just put a new head gasket in so maybe when I was putting the distributor back in I fouled the wiring somehow.....ughhh......I doubt it, but its a possibility, of course. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 27, 2010 Author Share Posted January 27, 2010 UPDATE: Okay, my spark LED17 (D14) FUNTION light which is set to spark output A is now on constantly. What does this mean? I am getting no spark as of right now with that light constantly on. Is it a bad coil? Bad spark plug wires? Bad coil wires? I'm at a loss right now. It sure as hell is getting fuel, thats for sure. Quote Link to comment Share on other sites More sharing options...
letitsnow Posted January 27, 2010 Share Posted January 27, 2010 Post the msq. How are you driving the coil? vb921? HEI? Quote Link to comment Share on other sites More sharing options...
Zmanco Posted January 27, 2010 Share Posted January 27, 2010 A few things: - Did you follow Moby's recommended steps in post 10? If not, stop and get these settings correct. Your black plugs are not surprising if you're using someone else's tables from stock injectors with your 440's. - Ed is correct: at this stage pull the O2 sensor before you destroy it from the excessive richness. I killed my first one exactly that way. At the stage you're at, you don't need it yet. - You're not going to want to hear this, but I think you have a lot of MS reading to do in order to tune intelligently. Right now you're guessing/hoping that you can just get it up and running and then figure it out on the fly. As anyone else who's been through their first MS install will tell you, that's a recipe for frustration. MS has a rather steep learning curve at first, but if you study up on the theory BEFORE, you're a lot more likely to avoid making silly mistakes in configuration that cause you fits in getting it started like you're seeing now. - Another suggestion you may not want to hear: before you invest any more time on MS1, spend the $60 (IIRC) and upgrade to the MSII processor. MS2/Extra is light years ahead of MSnSe in terms of capabilities, features, etc. And unfortunately the way fuel is calculated is different enough in MSII/E that you'll pretty much have to start over. Again, ask me how I know Good luck and stay with it. It's worth it! Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 27, 2010 Author Share Posted January 27, 2010 It seems that I have gone through the mega manual multiple times and I do believe I know the basic algorithms behind it. I have now established that my problem is getting no spark. The car is getting fuel, no problemo, but now I'm trying to fumble with this spark problem. As far as the triggering goes, we're using an 83 dizzy with the internal CAS (as all of them have). What could be causing the light to stay on constantly? Thank you for all of your help guys. I really appreciate it. Quote Link to comment Share on other sites More sharing options...
Zmanco Posted January 27, 2010 Share Posted January 27, 2010 There are 3 ways IIRC to wire up the ignition input circuit on the MS3.0 board. I'm not at home this week so can't check my notes for how I did it (I'm running a turbo CAS as well) but I believe one of them was for an opto isolator input, and that's the one you want. If you don't have it wired for the correct type of trigger, you're never going to get spark. If others haven't given you the answer by then, I can check late Friday when I'm home. Quote Link to comment Share on other sites More sharing options...
naviathan Posted January 27, 2010 Share Posted January 27, 2010 Post your MSQ. I have a few things I'd like to look at. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 27, 2010 Author Share Posted January 27, 2010 Okay, I'll attempt to post it tonight. For some reason, every times I go to pull the msq file, it's not there, it only shows up within megatune. Very odd if you ask me. As far as spark, we have run the car like this, the car has ran decent up until now, so I'm not sure what the he'll is going on. It seems like I had a spark ossiue awhile back where I had no spark for a while, but then it magically came back. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 28, 2010 Author Share Posted January 28, 2010 Okay everytime I try to attach it to my post, it says "Invalid File".....grr...... Quote Link to comment Share on other sites More sharing options...
naviathan Posted January 28, 2010 Share Posted January 28, 2010 You have to zip it up then upload it. The upload applet filters all but certain file extensions. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted January 28, 2010 Author Share Posted January 28, 2010 Okay well I hosted the file, so if this doesn't work, I'll do that. Here is my MSQ file: http://www.mediafire.com/?imv0knny2y2 And by the way, I am running Megatune 2.25 MS1 Extra 029y4. Quote Link to comment Share on other sites More sharing options...
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