MS2 DIS Saturn files for OBD1 code2.6

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.

S.Bretz · Post by **S.Bretz** » Fri Sep 15, 2006 8:13 pm

Ian says its there.

And mine is getting quite worse....especially with the boost turned up more. It used to pull harder with timing advance, now it pull harder with in limp mode. Under high boost sometimes it just misfires and then you can hear it drop a cylinder or 2 until it either runs the fuel out (too much from not bunring) or the ICM gets back to doing what it should. I know it works some what because I can tunr the advance off at idle and the rpms drops...it just seems likeit doens' have the ball to light up the mixture under haevier loads, richer modes (11's) and antything leaner then the 15.5 range...some times it will run with 15.5-16's, butmost of the time it will misfire for a second and then come back. If I turn advacne off, I don't get the stumbles...but its just slow and I have to burry my foot into the gas pedal more to get it to move.

Lordprimate · Post by **Lordprimate** » Sat Sep 16, 2006 9:02 pm

well i tweeked my .ini file so i can drop my dwell to zero.

after fiddeling around this is what i noticed...

anything below .5ms Dwell time caused popping and the car to die... very suttle at .4-.3 ms and at .2-.1 ms the car dies quickly..

from 1 ms to 25.5 ms i cannot HEAR or FEEL a smoother or stronger idle it all seems the same...

i did notice that if you ramp up the dwell time it changes more... IE .. Varies about 1ms around 25.5... maybe 2ms ... but if its on 1 ms it only varies .1-.2 ms everyonce and a while.

hmmmmmmm

bluetrepidation · Post by **bluetrepidation** » Sun Sep 17, 2006 6:56 am

Well having dwell under .5 ms I'd expect that to happen. The signal with those setting switches on and off so quickly the ICM may not be able to get a good read and it wold be more likely prone to interference. When you are changing the dwell and spark duration what you are actually doing is changing the duty cycle of the square wave the ICM receives. The ICM controls dwell with it own logic. This is why I'm confused that making changes to dwell is helping some people's setups when it really shouldn't do anything unless the duty cycle is so short that the signal gets misinterpreted.

A.J.

S.Bretz · Post by **S.Bretz** » Mon Sep 18, 2006 1:09 pm

IDK. I'm at a point where I might just dump this hole MS BS and get something that works. I went to the yard today to pull an ICM off another car, and it only has 4 wires... apparently, the PCM does all the other stuff and sends out an Ign"A" and Ign"B" signal. It would be the LX-367 module that is in the standard motor products catalog...an then there is a LX366, that doesn't even have tabs to put an ingtion coil on it....Im just lost righ now and want to shoot the MS and the car.

bluetrepidation · Post by **bluetrepidation** » Mon Sep 18, 2006 1:54 pm

Well I know how you feel considering I had lots of problems with the IAC till it was fixed. Let me ask you this...... Are you using stock plugs and wires? If not what? Also, how is your ignition output on your MS internally wired? Directly to the processor port or through the high current ignition driver?

A.J.

S.Bretz · Post by **S.Bretz** » Mon Sep 18, 2006 3:52 pm

I don't kow how its wired...I just followed the instructions for the HEI/DIS like the guide says.

More insight. I was looking into get a direct ignition from electromotive, and I looked into the PDF manual...it said that if you don't use resistor wires, then use a resistor type plug to eliminate/reduce noise...well I have used a regualr copper core plug for years with no problems...so I decided to get a set of resistor plugs. I installed them and I can turn the dweel and spark duration up to 25s an it won't stall out...and I can give it a load and it doesn't miss fire. I did manage to do a high boost pull in second gear, but if it was still breaking up, I couldn't tell. I will have to wait till tomorrow when I get on the express way, I mean test track, and can do a 3rd gear pull, 4th it out of the question, thats around 150ish at 7k.

I really hope the plugs are the problem...its usually stupid stuff that pwns me, and plugs seem like a pretty stupid thing right about now. If it turns out being the plugs, I'm gonna feel pretty de-de-dee, but releaved.

bluetrepidation · Post by **bluetrepidation** » Mon Sep 18, 2006 5:51 pm

I hope it is the plugs. You need resistance in the plugs and wires or the current on spark can get very very high and burn up coils or ICMs. So this seems to fit your discription.

A.J.

S.Bretz · Post by **S.Bretz** » Tue Sep 19, 2006 6:04 am

Yeah, it doesn..but it doesn't explain why I coud use a regular plug for so long. I have been using them for 200K plus now with no problems. It wasn't until the MS timing when I started burn stuff....weird.

Well. Im of to school. I let you know how things go later today.

S.Bretz · Post by **S.Bretz** » Tue Sep 19, 2006 11:35 am

Well, it did pul threw the 6900-7000 barrier on high boost today...before it would stop like it was at a wall, and it has been getting progressively worse. So being able to go past 7K is good news, but it was still breaking up. I'm going to get another saturn ICM tomorrow and see if that helps....if the problem has been getting worse, then I think it is safe to asseme that the ICM may have been getting worse and worse with the NON resistor plugs. More updates tomorrow night.