Ignition Control Module?
Thread Starter
Le Mans Master
Joined: May 2005
Posts: 5,214
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From: Queensland, AUSTRALIA
Ignition Control Module?
After doing abit of tuning to the fuel trim tables, my misfire/hesitation is all but gone, when the engine heats up there is consistant spark retard of 0.3-0.9*, open or closed loop seems to have no effect, LT4 Knock module is in place, its not picking up any undue knocks. Seems to be perfectly ok til the engine gets abit of heat into it. Would the ICM have anything to do with this issue? Thanks in advance people 
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Heat certainly can affect an ICM's operation. I would remove it, then take it to AutoZone or NAPA for testing.
Thread Starter
Le Mans Master
Joined: May 2005
Posts: 5,214
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From: Queensland, AUSTRALIA
Originally Posted by onedef92
Heat certainly can affect an ICM's operation. I would remove it, then take it to AutoZone or NAPA for testing.
Thread Starter
Le Mans Master
Joined: May 2005
Posts: 5,214
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From: Queensland, AUSTRALIA
Originally Posted by 94Controller
Case, if you leave today, which is tomorrow our time, you could get here yesterday your time...I think! 
Sorry, your reply made me laugh, just trying to return the favor.
Sorry, your reply made me laugh, just trying to return the favor.
No worries mate!!! That was a pretty good one though, so..... would you be able to pick me up from the airport yesterday afternoon?? 
Team Owner
Joined: Aug 2000
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From: San Pedro CA
no, it's tomorrow there today... so he would be here the day before last. 
I will give anyone who can figure the prior sentence out a free beer... cause I sure can't.
check the FSM, I think there are some tests you can run on the ICM.
Another trick is to hit it with cold... like a computer duster can upside down or something.
another thought, inspect the ICM harness connections. Jet-Jock chased a nasty problem with his 93 and it was aimed at a bad ICM and a bad harness... the new ICM would not make contact correctly.
I will give anyone who can figure the prior sentence out a free beer... cause I sure can't.
check the FSM, I think there are some tests you can run on the ICM.
Another trick is to hit it with cold... like a computer duster can upside down or something.
another thought, inspect the ICM harness connections. Jet-Jock chased a nasty problem with his 93 and it was aimed at a bad ICM and a bad harness... the new ICM would not make contact correctly.
Le Mans Master
Joined: Dec 2000
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From: Minneapolis MN
Originally Posted by onedef92
Heat certainly can affect an ICM's operation. I would remove it, then take it to AutoZone or NAPA for testing.
Thread Starter
Le Mans Master
Joined: May 2005
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From: Queensland, AUSTRALIA
Originally Posted by n1kki6
They can't test the icm for a 94 vette. I find this out when I brought mine in, they checked their book and their testing stuff wont work for it.
Its too far!!Thanks Bogus, i have been making progress with the VE tuning, and got it running alot closer to perfect when the engine is colder, ive noticed in a couple of my datamaster logs that the spark retard will start to creep in at about the same time as the engine would be starting to get warmer. I havent had a chance to really look at it in regards to shifting the module yet, is there any good reason to prevent me from doing this?
(can i trade my free beer for a chivas regal mate? )
Last edited by Casethecorvetteman; Jun 30, 2006 at 12:20 PM.
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Le Mans Master
Joined: Dec 2000
Posts: 8,740
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From: Minneapolis MN
Originally Posted by Casethecorvetteman
She's apples mate, i wont be taking it in!! Its too far!!
Its too far!!
Team Owner
Joined: Aug 2000
Posts: 40,156
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From: San Pedro CA
Originally Posted by Casethecorvetteman
She's apples mate, i wont be taking it in!! Its too far!!
Thanks Bogus, i have been making progress with the VE tuning, and got it running alot closer to perfect when the engine is colder, ive noticed in a couple of my datamaster logs that the spark retard will start to creep in at about the same time as the engine would be starting to get warmer. I havent had a chance to really look at it in regards to shifting the module yet, is there any good reason to prevent me from doing this? (can i trade my free beer for a chivas regal mate? )
Its too far!!Thanks Bogus, i have been making progress with the VE tuning, and got it running alot closer to perfect when the engine is colder, ive noticed in a couple of my datamaster logs that the spark retard will start to creep in at about the same time as the engine would be starting to get warmer. I havent had a chance to really look at it in regards to shifting the module yet, is there any good reason to prevent me from doing this?
(can i trade my free beer for a chivas regal mate? )I didn't know it was untestable... but the FSM has some tests for it re: my 92... perhaps some DVM tests are available? Perhaps the timing creep is an indicator of failure?
As for the free beer, you didn't make my senseless sentence senseable. So there.
Thread Starter
Le Mans Master
Joined: May 2005
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From: Queensland, AUSTRALIA
Originally Posted by bogus
As for the free beer, you didn't make my senseless sentence senseable. So there.
Melting Slicks
Joined: Oct 2004
Posts: 2,510
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From: Austin Texas
Originally Posted by Casethecorvetteman
But mate i figured out pretty quickly it was load of meaningless dribble!!!
so WTF day is it over there anyway, if today is Saturday, 10:56am, July 1, 2006 in Austin Texas??
Thread Starter
Le Mans Master
Joined: May 2005
Posts: 5,214
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From: Queensland, AUSTRALIA
Mike it was 1:56am Sunday the 2nd of July when you wrote that time ubove, and its now 2:15 am
I have a fair bit of thermal grease (i have the CoolerMaster stuff) around for when i build or fix computers. As i rule ive never really trusted the standard stuff, although the AMD heat sinks have pretty good stuff these days.
I have a fair bit of thermal grease (i have the CoolerMaster stuff) around for when i build or fix computers. As i rule ive never really trusted the standard stuff, although the AMD heat sinks have pretty good stuff these days.
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Originally Posted by Casethecorvetteman
Mike it was 1:56am Sunday the 2nd of July when you wrote that time ubove, and its now 2:15 am
I have a fair bit of thermal grease (i have the CoolerMaster stuff) around for when i build or fix computers. As i rule ive never really trusted the standard stuff, although the AMD heat sinks have pretty good stuff these days.
I have a fair bit of thermal grease (i have the CoolerMaster stuff) around for when i build or fix computers. As i rule ive never really trusted the standard stuff, although the AMD heat sinks have pretty good stuff these days.
Thread Starter
Le Mans Master
Joined: May 2005
Posts: 5,214
Likes: 65
From: Queensland, AUSTRALIA
The white stuff? Its another one of those untrusted items from my overclocking days!!! Since you only need the smallest little thin layer and only big enough to cover the core (unless its a later CPU) the little tube lasts a long time. So i just always used it
What do you reckon about moving the ICM? Didnt really have time to look today (and its too bloody dark now!!) to see where id move it to, but im open to sugestions if anyone has any.
What do you reckon about moving the ICM? Didnt really have time to look today (and its too bloody dark now!!) to see where id move it to, but im open to sugestions if anyone has any.
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Originally Posted by Casethecorvetteman
The white stuff? Its another one of those untrusted items from my overclocking days!!! Since you only need the smallest little thin layer and only big enough to cover the core (unless its a later CPU) the little tube lasts a long time. So i just always used it
What do you reckon about moving the ICM? Didnt really have time to look today (and its too bloody dark now!!) to see where id move it to, but im open to sugestions if anyone has any.
What do you reckon about moving the ICM? Didnt really have time to look today (and its too bloody dark now!!) to see where id move it to, but im open to sugestions if anyone has any.
http://shbox.com/1/4th_gen_tech2.html#ICM_cooling
Last edited by MikeC4; Jul 1, 2006 at 12:47 PM.
Le Mans Master
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Originally Posted by MikeC4
instead of moving it, you may want to put washers between the ICM heatsink and the engine block. I did this on my '95. Here is a good writeup on it. Simple mod.....
http://shbox.com/1/4th_gen_tech2.html#ICM_cooling
http://shbox.com/1/4th_gen_tech2.html#ICM_cooling
BTW Case, make SURE whatever heat sink compound you use can handle the heat range which the ICM will see mounted as it is to the passenger side cylinder head.
Check out Artic Ceramique, from the makers of Artic Silver, and note the peak and long term heat ranges plus its tendency not to run or bleed:
http://www.arcticsilver.com/ceramique.htm
