Is this issue specific to NGC code? I'm kind of thinking it is now that I give it a little bit of thought, but what the heck. . . Here is my post from Neons.Org, that only guhfluh has replied to, stating that he has some slightly different hiccuping in the 3.7k RPM range:
Quote:
I kind of thought I might have read about a specific RPM range where some people were having some issues, but I can't remember what, where, or whether it's all in my imagination. . . .
So here's the deal, since it's gotten cold out, I've had more of a thing where I get "hiccups" that usually occur around 4100 RPMs, but it can range a bit up or down. Also, it seems to be most pronounced in the 80 kPa range.
Today I did some logs of it, and I've really got some strange stuff going on. I get semi-random increases or decreases in pulse width around that range, and they are pretty big spikes.
Sometimes the spikes correspond to a MAPdot amount that could cause that type of accel or decel event, but sometimes the MAPdot is at ZERO when it happens, and it can be either up or down. . .
I've been kind of putting off switching to MS2/E until I had a little time to mess with it. Maybe it's time!
Oh, by the way, I'm on a V3 board with MS1/E ver. 29T IIRC, running fuel and spark.
I have a strange spacing of my RPM bins around this area that I came up with to help accommodate the apparent needs of my fuel curve. I was thinking that might be the issue, but I just don't know how that would create these dramatic spikes in the pulse width, and why it would seem to be so much more prevalent in the cold weather. . .
Why can't people start posting their msq's for people to compare betwee those who have it and those who don't? Will that help? I have my latest one on boost junkie's website, but mine's a SMEC crank signal. People can also post their datalogs for review. I think those will help diag more than just stating if you have it or not and if you have the asd bypassed or not. Just my thoughts.
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Hello guhfluh it appears that you have not posted on our forums in several weeks, why not take a few moments to ask a question, help provide a solution or just engage in a conversation with another member in any one of our forums?
I've heard that excuse too many times. I give mine up for others to use and learn from. If they blow it up using my map, it's their fault not mine. I can't tune their car from here and every car's different. On the other hand it may help them. Other people's maps helped me get mine running.
The only person who should be hiding their maps is a tuner who makes his living on tuning peoples cars.
Why can't people start posting their msq's for people to compare betwee those who have it and those who don't? Will that help? I have my latest one on boost junkie's website, but mine's a SMEC crank signal. People can also post their datalogs for review. I think those will help diag more than just stating if you have it or not and if you have the asd bypassed or not. Just my thoughts.
Hey guys, sorry, I didn't see these additions to the thread, since I still had my old e-mail address in my profile. . .
Anyway, the reason I don't post up my .MSQ is simple laziness. . . I don't often have my tuning computer online, or even in the house, so it requires special effort to get the .MSQ posted up somewhere if people aren't even going to look at it. If someone wants to see it, I'll gladly undertake the effort to get it posted.
Incidently, I intend to post my last MS1/Extra .MSQ up to boost bunkies .MSQ database. It's pretty good other than this hiccup, and I have transitioned over to MS2/Extra, not intending to go back!
I should mention that my .MSQ probably isn't a LOT of help on here, since I'm currently running a bolt-on only 2.0 liter SOHC!
mine(hiccup free) is on there somewhere, but hasnt been tested for high boost yet and I run a 1st gen with custom harness...no ASD, etc, so it may not transfer over that way to other people's cars
I have still been trying to diagnose my hiccup in the MS1 420a code HR_10d now, and I'm now thinking it might be from grounding issues or charging issues....who knows really. BUT, I am going to change my batterey mounting location and add grounds and see what happens. I am also going to remove the alternator belt or unplug the alternator and see what happens.
Just FYI because it may not be a code issue, but an issue in MS's seceptability(sp?) to noise.
I am still using the older code(non high res) and have no hiccups. I had some, but that was tuning wise. I should have parts back on my car soon and will upgrade to the new high res. When I did my battery relocation we made sure I had lots of good grounds. We used 2-OT cable for everything....made real nice grounds and power cables. Not sure if that helped me out at all with the megasquirt, but just throwing that out there. As far as the megasquirt being grounded david did that.
You know, I don't know if mine (with MS1Extra) was the same as everyone else's, but my hiccup (at about 4,100 ordinarily) showed up on the logs as PW spikes, usually upward if I recall, but some downward too. . . I haven't been able to figure how it could have been spark drop. After all, it wasn't just changes in AFR, that I could have explained by saying that a little bit rich could be from a little bit unburned fuel, and going lean could be a dead rich reading (that reads lean). . . .
Anyway, since going to MS2Extra, it's gone! I've got my fingers crossed!
Last edited by Tjabo : 12-26-2007 at 08:13 AM.
Reason: Fixing some of my inept typing. . .
you know...its funny you mention charging issues...I dont use a neon alternator at all...I use a modified unit from a dodge colt/mitsubishi mirage(which is internally regulated)...which usually wouldnt mean anything to me...then I remembered the first time I ran MS on my first turbo neon at the track(it was a SBEC engine rather than NGC, but thats neither here nor there) anyway, I ended up throwing an alternator belt on my second run, so it wasnt charging at all and all of a sudden, the car was misfiring and hiccuping so badly I actually had to hook the stock computer back up to be able to drive it home(this was when I still had the stock computer, which could run the SBEC engine) I just thought that MS pretty much required 14v to be able to run right at the time, but it seems it may have something to do with this infamous hiccup after all
you know...its funny you mention charging issues...I dont use a neon alternator at all...I use a modified unit from a dodge colt/mitsubishi mirage(which is internally regulated)...which usually wouldnt mean anything to me...then I remembered the first time I ran MS on my first turbo neon at the track(it was a SBEC engine rather than NGC, but thats neither here nor there) anyway, I ended up throwing an alternator belt on my second run, so it wasnt charging at all and all of a sudden, the car was misfiring and hiccuping so badly I actually had to hook the stock computer back up to be able to drive it home(this was when I still had the stock computer, which could run the SBEC engine) I just thought that MS pretty much required 14v to be able to run right at the time, but it seems it may have something to do with this infamous hiccup after all
I haven't done the tests I mentioned above because I was very ill and in the hospital, but... from what I remember of playing with tuning when I first got it runnning, my MS would run like crap on low voltage also.
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