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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-28-2004, 03:17 PM   #71
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Quote:
Originally Posted by GreenMachine
Enmityst,

I already modified them. There'* not that much different between them, other than a couple not used becoming boost control and a couple factor values different. So far I'm liking it. I also figured out the macros. You can alternate between "hush chatter" and a normal command automatically. I will try that out tonight to see if it helps with stability.

Good luck on your intake repair.
Ah, okay. I've tried the alternation between hush chatter and a data request, but for some reason CarBytes doesn't like that, at least with my setup; for every hush chatter command sent, it logs zeroes to the data, so that when you view the data, every other reading is zero. It makes it difficult to determine what the hell'* going on, exactly, and when charted it'* almost useless. Maybe you'll find a way around that; I found that if my timing settings were tweaked just right, I never had to send a hush command while I was requesting data. I just send one hush right before I send the repeated m1m0 requests to make sure that the first request doesn't collide with anything, and everything after that is timed at intervals so that the PCM doesn't have time to chatter anything else.

-b
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Old 05-28-2004, 03:22 PM   #72
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Quote:
Ah, okay. I've tried the alternation between hush chatter and a data request, but for some reason CarBytes doesn't like that, at least with my setup; for every hush chatter command sent, it logs zeroes to the data, so that when you view the data, every other reading is zero.
I believe your right, but I think I may be able to come up with a way to remove the 0 data by post processing the alg file that comes out. If I can stabilize it without this, I won't need it. I'll keep you posted.
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Old 05-28-2004, 04:15 PM   #73
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Originally Posted by GreenMachine
I believe your right, but I think I may be able to come up with a way to remove the 0 data by post processing the alg file that comes out. If I can stabilize it without this, I won't need it. I'll keep you posted.
Gonna bust out some perl, eh?

-b
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Old 05-28-2004, 04:40 PM   #74
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You got that right! I use perl almost on a daily basis. Once you know it, it'* a real time saver. I used to use mostly C, and still do in some cases, but many times, in less than half hour I can get what I need with perl. I think we may lose some viewers with all this geek talk, but this is a geeky subject. :P I can't tell you what a Godsend this website is for me. I've been in the dark too long with my beloved bonnie. She needs some tuning up, and it'* nice to not have to depend on mechanics with expensive tools if I can avoid it.
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Old 05-28-2004, 11:28 PM   #75
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I wouldn't be able to modify my pcm, and it'* values from my laptop with a setup like this, could I?
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Old 05-29-2004, 11:39 AM   #76
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Quote:
Originally Posted by BonneMeMN
I wouldn't be able to modify my pcm, and it'* values from my laptop with a setup like this, could I?
I honestly have no idea; I've looked through the protocol specifications for my car, and the only commands it lists are mode 1 message 0 (running data), m1m1 (stored codes), m7 (I have no idea what this does, but it doesn't look like you can send any specific requests along with it), m8 (hush chatter), and m9 (resume chatter). I remember reading somewhere that you can get a ROM dump from the PCM through ALDL, but I don't recall anything about reprogramming it through the ALDL.

My best guess is that you'd need to physically pull the PROM and use a reprogrammer to modify PCM operation, which would require an intimate knowledge of the PROM'* memory layout and characteristics, unless you had some pre-made binary from somewhere or another to dump into it.

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Old 06-01-2004, 07:15 PM   #77
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Enmityst,

I was able to get some clean runs on my car by setting up a macro that first does a few hush chatter commands, followed by 10000 mode 0 commands. With this, I get an error free train of data, except every 1024 counts, which appears to be a carbytes bug (that is where it clears the screen buffer). This is a minor annoyance. It appears all my flags come up clean, and all the sensors are doing what they're supposed to do. There is only one error I'm getting, and that is with the m1m1 setup, and collecting mode 1 data, I get all 1'* on byte 49 QIMRDY08. This is the same on both L36 and L67 specs. I'm wondering if you had the same thing come up on yours. It doesn't make sense that all 8 bits come up error, unless there is either an incorrect spec, or the ECM is faulty. One of the bits is catalyst monitor malfunction, and I don't think the 95 has a catalyst monitor. What'* your take on this?
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Old 06-01-2004, 07:54 PM   #78
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Just a correction on my last statement. Byte 49 is a 0F which indicates the first 4 bits are high. This is the I/M readiness flagword. I wonder what I/M readiness means. One of those bits is misfire detected, but the other code pulls don't show any misfires.
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Old 06-01-2004, 08:05 PM   #79
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Quote:
Originally Posted by GreenMachine
Just a correction on my last statement. Byte 49 is a 0F which indicates the first 4 bits are high. This is the I/M readiness flagword. I wonder what I/M readiness means. One of those bits is misfire detected, but the other code pulls don't show any misfires.
I'm not certain as to what I get for the m1m1 response; nothing sticks out in my mind as odd from what I can remember of it, but I don't have a log of any of those responses, so I can't say for sure. I'd run out and check, but my car'* still in the shop

When I get it back I'll check it out. It'* entirely possible that spec on that word is incorrect; there are a number of bits/words/bytes in the m1m0 response that don't seem to mesh with the datastream spec.

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Old 08-13-2004, 04:52 AM   #80
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you might want to try AKMcables.com or wotelectronics.com for a pre-made cable.
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