menzzer37 Posted July 27, 2009 Share Posted July 27, 2009 Hi guys, I could use some help as I have exhausted my resources on injector debugging. Ok, I have a v3.0 board running spark and fuel (MSI). I'm using the Ford EDIS-6 ignition system, and I have great spark! My gauges all work on megatune, but for some reason the injectors are not opening. I'm running a relay board and have tripple checked all my connections. I am getting 12v to both pins at the injectors, but apparently, megasquirt is not grounding them for fire. I have attached my code if anyone is kind enough to look at it. I've scoured the forum, but if someone has also had a similar issue, please point me in the right direction. My VE table is borrowed from another member.Thanks. Copy of 280z July.zip Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted July 27, 2009 Share Posted July 27, 2009 MegaSquirt is seeing an RPM signal, right? Do the injector outputs work on a Stim? Quote Link to comment Share on other sites More sharing options...
menzzer37 Posted July 27, 2009 Author Share Posted July 27, 2009 The RPM is there, yes, but I do not have a stim. The LED is not blinking on the ECU while cranking. Is that a problem? I found a thread about possibly a burnt injector driver. Could this be an issue? They are low z injectors, but I have it set for that (I believe). Quote Link to comment Share on other sites More sharing options...
menzzer37 Posted July 28, 2009 Author Share Posted July 28, 2009 Any ideas? I have reinstalled the firmware. Please help! Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted July 28, 2009 Share Posted July 28, 2009 Could yo post a data log of it cranking? Quote Link to comment Share on other sites More sharing options...
menzzer37 Posted July 28, 2009 Author Share Posted July 28, 2009 I'll put that up tonight after work. Thanks for helping, I'm at a loss. I have a friend who's consulting for B&G and he can't seem to debug the issue over the phone, so maybe you can figure it out. Thanks again Quote Link to comment Share on other sites More sharing options...
menzzer37 Posted July 28, 2009 Author Share Posted July 28, 2009 Here is my datalog. I see that there is alternating pulse width of 5.8 ocassionally that I cannot explain. Thanks datalog200907281910.zip Quote Link to comment Share on other sites More sharing options...
menzzer37 Posted July 29, 2009 Author Share Posted July 29, 2009 I think I may have discovered the problem: my flood clear value in cranking settings was 0... My normal TPS position closed is at 6, so... Maybe we have a solution? I have yet to check. Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted July 29, 2009 Share Posted July 29, 2009 I think I may have discovered the problem: my flood clear value in cranking settings was 0... My normal TPS position closed is at 6, so... Maybe we have a solution? I have yet to check. Bingo! I also took a closer look at your MSQ. There's a lot of weird settings in it besides the flood clear value. Did you by any chance just open MegaTune and start composing an MSQ before you connected to the Megasquirt or loaded a valid file? If so, MegaTune will default to a file full of zeros. If that's the case, I recommend reloading the firmware and starting with the default values - either edit them in the Megasquirt or save them and edit them offline. Quote Link to comment Share on other sites More sharing options...
menzzer37 Posted July 30, 2009 Author Share Posted July 30, 2009 well I have fuel, but I'm not timed right... I have a backfire, and a consistent one. I tried adjusting the timing, but with no luck. Any ideas? Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted July 30, 2009 Share Posted July 30, 2009 Check it with a timing light; where is your timing while cranking? It may help to have the injectors unplugged while checking timing. Then you need to get the cranking fuel dialed in. After an unsuccessful start, have a look at the plugs. See if they're wet and you're getting too much fuel, or dry and you don't have enough. Quote Link to comment Share on other sites More sharing options...
menzzer37 Posted July 31, 2009 Author Share Posted July 31, 2009 I've tuned my mixture both ways, but i believe it's a spark issue or possibly another megasquirt fault. I have EDIS, so I thought you didnt have to time that? Either way, I'd like to build a new MSQ file and start from scratch. Here are the specs so that we can begin laying it out. If anyone can give me any advice, I'd be thankful... EDIS-6 300zx low Z injectors (280cc ish) New billet big bore fuel rail ported 240sx tb and tps JAW wideband and bosch walbro 255 external running a sump fuel cell t3/t4 hybrid on stock turbo manifold. stock cam turbo rods/pistons megasquirt 1 extra Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted July 31, 2009 Share Posted July 31, 2009 In theory, you don't need to time EDIS, but in practice the trigger wheel installation may not be 100% accurate. It doesn't hurt to check. Quote Link to comment Share on other sites More sharing options...
menzzer37 Posted July 31, 2009 Author Share Posted July 31, 2009 Timing looks good. Moby any suggestions? I have a steady backfire. When I crank, I will get periods of fast spin, like trying to start or I will get a quiet backfire grumble from the exhaust. Plugs are lightly wet, but that could be from playing with the timing. Quote Link to comment Share on other sites More sharing options...
menzzer37 Posted August 5, 2009 Author Share Posted August 5, 2009 Ok, so I've got spark, my timing is right and the RPM signal is strong. It tried to catch yesterday but didn't. Now I've got nothing. Any thoughts? Quote Link to comment Share on other sites More sharing options...
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