MS2 DIS Saturn files for OBD1 code2.6

S.Bretz · Post by **S.Bretz** » Wed Aug 09, 2006 5:05 pm

Waring....Beta code use with cuation. I don't know how well, knock retard will work, but everything esle seems fine on a SATURN...fueling and timing wise.

I edited the .ini file for you guys. Try setting the dwell time to .01ms.

The OBD1 ICM does the dwell on its own. I wasn't sure what the MS would do if you set it to zero so that is about as close as you can get without hitting zero...i did this because I know some entries of Zero, will result in something like a 13...not good. I ran it at 1ms and its fine. If you run into probelms at .01ms, try slowly increasing it to 1.0. I don't recommend anythign over 2ms, as your ICM may last only a few days/50miles.

Lordprimate · Post by **Lordprimate** » Wed Aug 09, 2006 6:50 pm

Did you fry an ICM .. going over 2ms of dwell time... Did you have running problems...

at first i was only running 8ms.. the max allowed by MT config file...

then i edited it to allow 25 ...

didnt really notice a differenct in functionality... and its been running for quite a while at 25ms... the ICM isnt fryd(yet)

ill give it a try... just to see...

And how did you edit the INI file.... I mean what did you edit and why?

tebriel · Post by **tebriel** » Wed Aug 09, 2006 6:55 pm

primate,
you definetly don't need that high of a dwell. sam was running that at first, and found his spark duration was too large also. here's the thread on PR.net: http://www.plastikracing.net/phpbb/view ... 7&start=45

look for the long post

-teb

Lordprimate · Post by **Lordprimate** » Wed Aug 09, 2006 8:18 pm

werd,

well , i am about to flash 2.686t6 into the MS2...

i got the latest INI file... what was changed in S.Bretz INI ...

ill go ahead and set the dwell time to .01

i know i read about the ICM controling the dwell ... never occured to me to turn MS control to zero...

OH yea ...

and it just hit my eyes that you also changed the Spark Duration to under 2ms as well..

so thats both Dwell and Spark duration that need to be changed... ?! werd

S.Bretz · Post by **S.Bretz** » Wed Aug 09, 2006 9:08 pm

Yes...set spark duration to 1.5ms 2 works too. Its name/title is decieving. Youwould think that saprk duration is how long outry to hold the spark during arch, but it is the null time between when the spark stops and when the next "start charge" event happens.

S.Bretz · Post by **S.Bretz** » Thu Aug 10, 2006 1:53 pm

Update. I was running the dwell at .01, and MT read it a Zero.

It also seems that in my case the ICM looses timing control when the dwell is set to .2ms or less. It ran fine at .3, but I left it up at .5ms. Its seems to be strong and I'm getting not break up probelms at all.

So... lets say this.... start your dwell OVer like at 1ms or 2ms, and slowly turn it down. I just stepped down .1ms at a time until the spark changed. I turned it to .2 and the car died in traffic....YAY. I turned it back to .5ms and it ran strong the rest of the way home.

Also, with all the ICM's have had in the last 6 monthes, not 2 of them liked the same numbes....true I was off by ALOT on the dwell and SD times, but I would expect everyone elses to like a few more or less dwell time....just play with it and you should get a good setting after a few trys.

Lordprimate · Post by **Lordprimate** » Thu Aug 10, 2006 2:38 pm

Well i burned in the 2.686t6 beta and got the latest ini. file...

i dropped my Spark Duration time down to 2 and then while driving (not because of problems just to see) i dropped it to 1.5..

i dropped my Dwell Duration time down to 1(i tried .01 and it said it wouldnt allow it (i guess thats what you modded in your ini file Sam.))

but i have been driving it and it feels stronger in the midrange then it did before... dont know why?

it idles much better

over all im very pleased with the new code... I have Very consistant startups... No tweeking with the IAC steps at all... Just VE tuning so far...

now i just have to tweek the X-Tau table a bit to catch the lean dips during hard shifting... and all will be good

Good job, EVERONE, who contributed to the code ... Nicely done...

S.Bretz · Post by **S.Bretz** » Thu Aug 10, 2006 8:46 pm

Yes...thank you everyone. I'm so very happy with the MS2 right now....and so happy that I finally got the timing ish figured out. I just ordered a fidezna cam gear to bring the exhaust adv back to stock (maybe +2 or 3 to help spool), and another muffler so the LS1's can hear me coming as easily...plus it will kill the reat of the turbine whirl (i love that noise...it just throws off the sleeper

).

I'm so pleased right now. I might have to make Melissa sleep on the floor( but not after some IDB of cousre) so the MS2 and I can cuddle tonight.

bluetrepidation · Post by **bluetrepidation** » Fri Aug 11, 2006 12:01 pm

I've been running 25 ms dwell for a long time now with no problems. What are you trying to accomplish here?

A.J.

bluetrepidation · Post by **bluetrepidation** » Mon Aug 14, 2006 6:54 am

Well I'm running a NA engine here so it must not be as noticeable. When I get some time I'll tinker with these settings again like you are suggesting and see if I can notice a change. Very interesting though.

A.J.

tebriel · Post by **tebriel** » Tue Aug 15, 2006 8:24 pm

well i have no real noticable problems running spark.
i guess the only thing would be low throttle, low rpm cruising, a little misfire. but not totally sure. it could be the acc settings fing with me or something.

otherwise it rocks hardcore! i think i have like 30* advance at 18psi.

-teb

S.Bretz · Post by **S.Bretz** » Tue Aug 15, 2006 10:24 pm

That's just wrong...your gonna blow yourself up.

Are you sure you are using 93?

bluetrepidation · Post by **bluetrepidation** » Wed Aug 16, 2006 12:32 pm

Yeah anything above 28 at WOT on my NA engine and it pings. I am using lowest grade pump gas as well though.

A.J.

bluetrepidation · Post by **bluetrepidation** » Wed Aug 16, 2006 12:34 pm

I also messed with the settings like you suggested and noticed no change fyi.

A.J.

tebriel · Post by **tebriel** » Thu Aug 17, 2006 7:11 am

yeah it's 93, and no pinging here, i check the plugs after every time driving it and there's never been any sign of detno. i do also have low compression though

S.Bretz · Post by **S.Bretz** » Tue Sep 12, 2006 4:09 pm

Well, News to report.

It seems that my ignition is breaking up at 7K again....everthing was working well until a few weeks ago. Under highboost, it wouldn't pull past 7K rpms....it just stopped. I pulled the plugs and found that I had gap errosion. all plugs had .045 - .050 gap on them. I put a new set of plugs it and it ran fine for a day. boostedsl2 came to visit and we took the car out for a joy ride and the igniton problem came back...pulled the plugs and all looked well.

Started playing with the dwell and spark duration and it got worse.
I put it back to what I had it running at when it was running good and did a pull...but when it hit the probem area, I switched it to the limp mode by turnign off the 5v bypass signal and it pulled right on threw like a champ...so the ignition system has plenty of power.

So I'm down to a few possibilities:
1) Another bad ICM
2)possible problems with the MS code.
3)...I don't know of a 3rd yet
4) Need to try a NON-saturn ICM.

tebriel · Post by **tebriel** » Thu Sep 14, 2006 5:59 am

that's weird once again sam. have you been able to datalog it? maybe there's something that is pulling the timing?
-teb

bluetrepidation · Post by **bluetrepidation** » Thu Sep 14, 2006 11:19 am

I think it is that time to test a non-saturn ICM. There are several odd things involving starting and high RPM torque that seem like it could be my ICM too. Playing with the dwell and spark timings just doesn't seem to do much. I'd be willing to try this myself too but what hardware to use? I also have access to a digital oscilloscope so I could take a look at the waveforms from and to the module. But I'm not to sure what it should look like to begin with? If anyone would find that useful let me know and I can post.

A.J.

tebriel · Post by **tebriel** » Fri Sep 15, 2006 5:12 am

last time i was driving my car, i didn't notice any problems at all, it was running well enough to hand that GTO's butt to him at the track

-teb

bluetrepidation · Post by **bluetrepidation** » Fri Sep 15, 2006 6:36 am

teb,

Do you notice any changes in your car when you play with the dwell and spark time values? What are your settings now so we can compare?

A.J.