Lukaniuk Posted March 30, 2008 Share Posted March 30, 2008 I cranked and cranked all afternoon, changing all the values in the cranking and after start enrichment tables but no luck. It seems like I'm always flooding it. Sometimes it sounds like it wants to start and it will get around 350rpm sputtering and spurting but it won't go anywhere near an idle. Could the MS Guru's take a look at some of my settings and help me figure this out please!!!!! It was wierd - sometimes it would seem to work good with what seemed like extremely rich numbers and then later what seemed extremely lean. Details: 82 L28ET stock internals and cam 440 supra injectors + Pallnet FR T3/T04E 60mm TB MS1 V3.0 MSnS extra (29y4) Triggered from the distributor Followed the write up and wired like shown at http://www.diyautotune.com/tech_articles/how_to_megasquirt_your_280zx_turbo.htm Here's some jpegs of my settings. This is just the last numbers I tried before I gave up this evening. I feel like I've tried a million different combinations for the cranking and after start enrichment tables with no luck. I feel like I've just overlooked something simple and any input would be appreciated. Has anybody had any luck with a similar setup using the 29y4 code? Quote Link to comment Share on other sites More sharing options...
Lukaniuk Posted March 30, 2008 Author Share Posted March 30, 2008 I was just thinking after I posted the first question. I'm also kind of confused on how to setup the throttle body. If the butterfly is closed, will enough air get through for the engine to run? and if not, how much do I have to open the throttle body for enough air to get by? and then how is the TPS supposed to be set? Quote Link to comment Share on other sites More sharing options...
hughdogz Posted March 30, 2008 Share Posted March 30, 2008 I can't answer the Megasquirt aspect, but if you think the engine might not be getting enough air to start, is it able to start if you crack open the throttle a tiny bit while you're cranking? Can you open up the idle adjustment screw on the TB? Do you still have an idle air regulator hooked up with "key-on" power? It is seperate from the EFI system. HTH, -hughdogz Quote Link to comment Share on other sites More sharing options...
jeffer949 Posted March 30, 2008 Share Posted March 30, 2008 try setting up your tps. When you have megatune open. click on tools and then click on calibrate tps. Then with your throttle closed click the get current. on the closed setting. next hold your throttle wide open click the get current on the wot setting. Quote Link to comment Share on other sites More sharing options...
Lukaniuk Posted March 30, 2008 Author Share Posted March 30, 2008 Hughdogz I tried with trying to crack the throttle a little bit, it seemed like it was helping, but it didn't start. I'm not using a idle air controller. I'm going to try adjusting the idle screw next I think Jeffer I did calibrate the TPS but it didn't seem to do anything. Will that make a difference for starting? Quote Link to comment Share on other sites More sharing options...
dexter72 Posted March 30, 2008 Share Posted March 30, 2008 Are you sure it's flooding?. If so maybe try lowering your required fuel. Cygnus seems to have a setup similar to yours, he has ms2 though but look for his posts. I didn't see it but can you post your VE and Ignition tables. Quote Link to comment Share on other sites More sharing options...
Lukaniuk Posted March 30, 2008 Author Share Posted March 30, 2008 Ya I'm sure its flooding. I pulled one of the plugs out and it was very wet so I took the injection fuses out of the relay board and turned it over a bunch. When I put them back in I tried low values then kept increasing them until it was flooded again. Here's my tables for ignition and spark. I wasn't adjusting these at all because I didn't think that they were used at all for starting. I'll try searching for Cygnus' settings Quote Link to comment Share on other sites More sharing options...
mobythevan Posted March 31, 2008 Share Posted March 31, 2008 Yeah, the the approach I use is open the throttle blade with the screw to make sure it will get enough air to start, idle may be really high but it doesn't amtter at this point. Then adjust fuel up or down until it starts. Quote Link to comment Share on other sites More sharing options...
wigenOut-S30 Posted March 31, 2008 Share Posted March 31, 2008 Have you checked spark? I had the exact same problem but was using a MSD unit for spark, It would spark but it was very weak.. If you have weak spark the compression will blow it out before fuel hits it. Quote Link to comment Share on other sites More sharing options...
Lukaniuk Posted April 1, 2008 Author Share Posted April 1, 2008 I couldn't sleep almost all night last night because I was racking my brain trying to figure out what was wrong and then it dawned on me I'm sure the timing is WAY off for some reason (and then I couldn't sleep b/c I was too excited). I got to go out to the car tonight and after a little bit of tinkering around with flooded cylinders and weak spark I got the timing light on it again and sure enough something was way off with the timing. I honestly don't know how I had it so messed up. So now in order to get the timing light to match the value in MS for the cranking angle I needed to set the trigger angle at 65 degrees with 0 trigger angle addition. This kind of seemed funny to me because it was so far off of the values that I have seen other people using - but I figure its worth a shot. and BAM! there it is, idling first try! not a very nice idle but idling. I didn't let it run for long (maybe 10 15 seconds) because it didn't seem to me like it was firing on all cylinders. I hope this is just due to the weak spark I had to deal with when I first started working tonight b/c I don't think that will be too hard to fix. My new questions are: 1) are the values I have for my trigger angle reasonable? (65 degrees 0 addition) or am I way out to lunch with something here? 2)Where does MS get most of its current from +12V or +12V switched? I know I've got a connection with lots of power for +12V but I'm not so sure about the switched power and I'm not sure how much this will affect my spark. I'm using a relay board from DIY if that makes a difference Quote Link to comment Share on other sites More sharing options...
Lukaniuk Posted April 1, 2008 Author Share Posted April 1, 2008 btw thanks for all the input guys Quote Link to comment Share on other sites More sharing options...
hughdogz Posted April 1, 2008 Share Posted April 1, 2008 Whoo hoo! Good sleuthing...congrats Lukaniuk! Quote Link to comment Share on other sites More sharing options...
mobythevan Posted April 2, 2008 Share Posted April 2, 2008 65 for the spark angle should be fine. I run the same gauge wire on both 12 volt and 12 volt switched. Quote Link to comment Share on other sites More sharing options...
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