baggedgoods
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Everything posted by baggedgoods
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Thaanks. I'll keep you updated when I hack away at it tonight
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Which are you referring to? I haven't messed with my ve table or ignition table. I'm trying to sort out this timing issue first before I get the rest in check.
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First MS install plus the stock ecu has like 30 more wires than my ms so I planned to take it slow as for getting rid of it.
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Haha, let's just say I'm glued to my phone right now. Trying to get as much information as i can. Can't take enough shit breaks in a day though lol
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Bit of a miscommunication. 3 of the 4 wires are connected to my MS. The pullup resistor is in place and the only wire not connected to anything is the 360* wire. I don't have a HOME pin, but I don't plan on doing sequential injection or wasted spark as of right now.
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After work I'll be disconnecting all fuel and ignition inputs/outputs from my stock ecu. With your post above, I was hoping I wouldn't have to make mods to the board whatsoever. But it seems I may have to. Which mods am i going to have to make for sure?
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See, now that's the thing. The timing doesn't seem to want to stay where my MS is telling it. Even when I have my advance set to "fixed advance". I've toggled between fixed advance and use table, but it doesn't seem to do anything different. I believe that if you have the advance using fixed advance at #*, revving the engine will not change the timing at all, because it's set to a fixed angle. But it doesn't stay fixed, it seems to jump and sometimes seems to be firing in between the 1st and 2nd cylinders.
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My stock ecu is basically piggybacked with my MS. I sort of had an epiphany this morning about how my stock ecu may be conflicting with my megasquirt for ignition because I have only one wire from my ignition to my MS and the rest are to the stock ecu. I have 3 out of 4 wires from the distributor going to my megasquirt, and the one (360*) not hooked up. I will be making ms completely stand alone once I've gotten everything sorted out with my stock wiring. Like I said, taking one thing at a time, there's no rush. Have you taken a look at my logs? Maybe unraveled what I've got going on with it?
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I can grab a few screenshots of them while idling tomorrow trigger log.zip tooth log.zip composite log.zip
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Hey guys. I guess I'll consider this a follow up thread from my last one here(http://forums.hybridz.org/topic/124831-megasquirt-ignition-and-timing-problems/). The car cranks and runs. I don't think my MS is controlling the timing but it's producing the spark at the least. I've gone through the tests to check for my commanded timing and my actual timing with no luck. The timing on the crank is really sporadic at idle and the timing marks disappear and reappear when I increase the RPM. It seems wherever I adjust my dizzy manually, is where it stays at during idle. The stock dizzy on 85T vg's is electronically controlled. Could my stock ECU be interrupting the MS's signal? (I haven't gotten around to going completely standalone YET, but I'm taking this one step at a time). I've got the car running which is a big step, but I've got no timing control, either in "fixed advance" or "use table". I burn and cycle the ecu whenever I'm prompted to. I've hit a wall with this. Hardware Pin 36 connected to the ?signal wire? on the stock power transistor. (I've tried all the other wires going to the coil, and this one is the only one that seems to work. It's the G/B wire) Pin 24 is connected to the CAS correctly because I am getting an RPM reading on the dash and in Tuner Studios. (It's also really sporadic) I have the B&G prebuilt MS2 v3.57 with 3.3.0 firmware from DIY Stock dizzy and ignition coil + power transistor DIY Nissan Optical trigger wheel Here is a datalog while idling and my current tune. I've got the tooth/composite/trigger logs but they are .csv files so they aren't of much use. I still haven't really figured out how to troubleshoot with the datalogs, maybe one day. Thanks zx2.zip CurrentTune.zip
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So I have to match the timing that I have locked my distributor to on the megasquirt. I'd do that by adjusting the trigger angle? Because my dizzy would be locked out at say "15" but megasquirt would read Something like "17.9". Adjusting the trigger angle would change the megasquirt reading and not the actual dizzy reading. Until I change my table to "use table" correct? And also. The same wire that runs the tach in megasquirt pin 24 is the same wire that reads the 6 slot part? Or 12 slot in my case. Thanks!
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A long awaited update. So Chickenman has helped me deduct that when I thought I was powering down my megasquirt, I wasn't actually powering it down. I was only restarting the sync with the laptop. (Completely blew my mind lol). Now I have my MS hooked up to a switched power and I have yet to start digging into it again. I haven't had much time since the last time I've been here to try any of your suggestions. I've been researching as much as I can and I'm going to get dirty with the Z again. I hope this thread isn't dead, but I have a few questions. I've looked all over for wiring the dizzy to control ignition timing. I have my tach wired up and it works on Tuner Studios. I only have pin 24 hooked up to 3 out of the 4 dizzy wires. I know one wire is for a 360 degree(crank) signal and one is for a 60 degree(cam) signal. I've had the car started with the old trigger wheel but I couldn't control timing.(I believe it might have been the power cycling issue) I haven't gotten it started with the 12-1 DIY trigger wheel. Would the one signal wire read RPM and control timing, or would I need to hookup a wire for a HOME signal also? Or does the megasquirt control the timing through the ignition coil?
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Hey Matt, I bought the board prebuilt from DIY but I believe it is the B&G MS2v3.57 with 3.3.0 firmware. What would be making me unable to control my timing from my megasquirt? I have tried using "Use Table." The timing will sit at the same place that the distributor has mechanically advanced it to. And not advance or retard no matter what i try. Using "Fixed Angle" won't change the timing from where the distributor originally had it.
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Well right now, I have my dizzy wired up only to the crank signal and the ground. Edit: and the power which is pulled up with a resistor. Would I need to hook into the cam wire somehow? Because I don't have a "home" pin anywhere. Again. I bought the megasquirt prebuilt. I'm not sure where I would hook the cam wire into my megasquirt. Unless it involves me rewiring a few things on the mainboard..
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Wouldn't I be using a different spark mode? Where I wouldn't need the trigger offset to be set. Unless that is needed before I switch to toothed wheel. How would I be able to set it at both minimum advance and maximum advance at the distributor? That would have two different numbers would it not?
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So I have ordered the new trigger wheel and will update further on it. I have a quick question, would I need to phase my rotors before I install the new wheel? If yes, what's the simplest way to accomplish that? I'm still a little lost on that whole thing. If no, then we're all good.
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Wow, I really appreciate all this advice. I had planned on dropping a thread at the msextra forums but I haven't had my tuning laptop lately with my logs and tunes. Once I get it, I'll be posting there. As for now, I'm going to wait till it's a bit nicer out. I will be trying your guy's recommendations and I will post whether I have any progress or setbacks. Thanks a bunch guys, I want to hit the streets soon with the beast!
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Yes I am running a wideband afr gauge. After every adjustment I make, I make sure to press burn every time. That picture was only for the sake of showing my ignition settings. I just don't understand how my timing is not being set by megasquirt. I've tried mechanically setting my timing to 0° and using the fixed advance at 10 or 15°, (clicking burn) and my timing would still be 0° at the crank. Edit: I've adjusted the trigger offset while doing this and I still have no success. I bought a pre built MS2Extra with the 3.3.0 firmware (if that's any help). I've read through a bunch of articles and posts about rotor phasing, and I don't really get the jist of it. I really appreciate the help.
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So I found this on the Megasquirt website for controlling spark advance with an optical sensor distributor(what my car has). http://www.megamanual.com/ms2/Bosch_124.htm Now, would I hook that up directly to my ignition coil? Or would I hook it up to my power transistor? The power transistor is also known as the ignition module, and I've read that people with Megasquirt for 300zx's have gotten their cars to run fine without the PT.
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Yeah, I already have pin 24 pulled up to 12V with a 1k ohm resistor. Then for pin 36 I have it pulled down to 5V through a 1k resistor. I haven't even messed with my higher end timing because I can't even adjust my timing through TunerStudio. My bad, I meant I could read the RPMs not tach in TunerStudio through my cas signal. I'm not sure how to change the source that TunerStudio reads the rpms from. I will look up some stuff about it later. I will post pictures of my setup in more detail later. Thanks guys. I've had such a headache with this thing.
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Yes, Megasquirt is seeing my crank signal because I am using it for my tach, and my tach is working properly. When i rev the engine with a timing light on it, the timing does not move. It's possible this could be an issue with the distributor, but it doesn't make much sense to me. Well I've researched a lot about my distributor wheel and they say for Nissans on the DIY site that they have 360 teeth with 6 slots for each cylinder, and each slot is 60 degrees apart. https://www.diyautotune.com/support/tech/other/megasquirt-ignition-control/
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Set my base timing in megasquirt? Or at the crank? If at the crank, I just spun my distributor cap till it lined up to the 15 mark on the crank pulley.
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I've read through it a couple times. The problem I'm having is when I try adjusting the timing through Megasquirt, the timing doesn't move on the crank. I set my fixed advance to 15 degrees, then spun the distributor until the timing light read 15 degrees at the crank pulley. When I change it back to "use table", Megasquirt will show my timing is at whatever my cells are set to, but on the crank pulley, it stays at 15. I've played with the throttle while checking the timing to see if it will move according to map pressure. But it stays fixed to around 15 and kind of bounces between 14-16 degrees. I can't post my msq file for some reason, but I can post some screenshots of my ignition settings and spark table. I'd prefer to use the spark table to tune ignition, but if theres another way, I'm all ears haha.
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Sorry, first time posting onto a forum. I have my spark A output wire connected to the 12V of my power transistor which I have pulled down to 5V through a 1k ohm resistor. My CAS is wired correctly because my car starts and runs and I have an rpm signal. So I don't generally think that's the problem. To my understanding, the spark a wire should be wired into the ground of the coil. I have tried running it to the ground of the coil and the ground of the power transistor. But that doesn't seem to work. Wiring it to the power allows it to work but I'm unable to adjust any timing with megasquirt. I could post my settings in megasquirt. I'm not at my computer atm.
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The car runs and drives okay. Still haven't gone through much of the fuel tables. Can't seem to get the timing to adjust electronically through the megasquirt. I can set the timing mechanically but I can't get it to advance or regard through the megasquirt. I've adjusted the trigger angle and that doesn't seem to sway it either way. I have an 85 300zx turbo with a completely stock ignition system. MS2/Extra firmware: 3.3.0 I've read all over about controlling spark with distributors and an ignition coil /power transistor, but I can't seem to get it to do what I want. Any advice would be amazing.
