Here it is! 1987 Bonneville LE 3.8. Drove a week ago Sunday with no problems. Parked overnight and it had no spark the next day. No codes. Replaced Crank Pos. Sensor - still no spark. Tested ICM @ Autozone trying for lifetime warranty.. tested good and they snubbed me. Found Delco II system. Installed used Delco system... No spark and now don't have power to Crank Pos, Cam Pos, or MAF sensor, I installed new ICM from Standard...I do have power to ICM but still no power to crank or cam sensors or MAF. Blows Fuse # 10 when I turn the key on instantly. Disconnected all 3 coils.. still blows... all while I have no spark... this one has me stumped! I'm tired of borrowing cars from my family members.. Any help or insight would be appreciated... Due to the time frame the problem first occurred... I have ruled out the cam pos. sensor and the PCM.

Have you inspected the wiring harness that connects the crank and cam sensors to the ICM?

Yes.. when I still had the Magnavox system on I had power to both sensors. When I installed the used Delco II system I had power to neither of them so I figured it was the used ICM so I purchased a new ICM. I'm thinking that there might be an off chance my Magnavox had a different wiring set-up than the Delco... but as far as I have researched it.. the wiring should be identical?

What motor and car did the used delco setup come from?

Originally it came off of a late 90's series 2 motor... The Delco II system module I just bought is for a 94 series I motor.

Just wanted to make sure it came off of a 3.8.

Make sure all the wiring is good and intact and the connector is seating correctly. Also, if you have a JY around, see if you can get another ICM to swap.

The CORRECT type two ICM is used on the LG3 ('86-'87) and shared with the 3.3 ('88-'92) ONLY.

3300's are very common, found in the Ciera and Century and various other models, so it should be pretty easy to find one.

Edit: FYI the type one (magnavox) has an additional +12v wire on the ICM harness that the type two (delco) does not use, other than than they are 100% swap back and forth.
The ICM on most of the 3300's do not have a square hole for the coil studs. The studs will free-spin unlike the one for the LG3.

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I always forget the 87 had the LG3 and they do not use the same ICM.

Could the extra wire on the Magnavox system cause the fuse to pop as soon as the key is turned to on? If so.. which wire is it and could I just take it out of the connector and see if that works? I just looked up the ICM module for the Olds and it's the same part I just put on my car.. Standard LX364... I'm hoping it's something as simple as disconnecting the extra wire from the connector. I have 14 wires going in and 14 pins on the module. The Series II ICM only had 13 pins.

EDIT: I don't have the correct module... I need the LX348... the LX364 has 14 pins and I believe it's grounding my 1st wire (pink/blk) 12V... the same one that supplies the voltage to the cam, crank and MAF sensor feed off of (according to my wiring diagram in my Chilton's) are there any other major differences between the 14 pin LX364 and the 13 pin LX348?

I suggest getting the ICM from a wrecker for the 88-92 3.3 as MattStrike suggested.

Yes, major difference, the trigger for the crank sensor is setup for the 3x and 18x interrupts on the post-LG3 ICM, and it uses a different method of controlling spark advance.

It's not worth the hassle to make what you have run the engine, a junkyard ICM can be had for about $20, depending on the yard.

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The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67

You should disconnect the ICM & see if the fuse still blows when key is turned on.

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Ok...New update: I failed to mention that I am the assistant manager at a locally owned auto parts store, and am ASE parts certified... I should have done more homework before buying the module for a 94.

My manager agreed to help me out by taking back the module and just putting it down as a defective module :-) I have the correct module ordered in and it is $20 less! I took the "new" module off tonight and to verify that the problem was in the module, I put it all back together.. minus a module of course... and put a fresh 20A fuse in the #10.. turned the key on and it didn't blow... So, with high hopes, I will install the correct module for the conversion around 5 pm AZ time. Good catch on my error Mike. Thank you for your 3.8 and delco ICM expertise!

We've seen oil pressure sending units short out & blow the ICM fuse, that's why I wanted you to check that out. There's a good chance that the ICM on the 87's ground through the mounting plate & mounting bracket. Clean any corrosion off the top of the mounting bracket & both sides of the mounting plate before putting the ICM on.

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2006 Chevy Monte Carlo SS

Wait...Who's Mike?...

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The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67

lol.. sorry Matt... So.. here is the update... Installed the new module, replaced the fuses I blew.. as well as all the other fuses in the panel.. just for good measure. Turn the key on and no fuses blow.. fuel pump winds up.. I crank it and it starts.. for about 4 seconds... then it dies. I get my test light and I, once again have no juice to the crank, cam sensor, MAF sensor OR the pink and black wire that has always had power... I repeat.. no fuses are blown... I DO have the correct module.. got one for a 90 olds 3.3.. 13 pin with no pin for the extra 12V+ wire... not sure where to start looking...

Are you referring to the Pink/Black wire at the ICM?
You probably already know this but the fuse for that wire should be under the dash on the passenger side of the car. It was there on the 89 I had.
When you checked for power to that wire where did you place the other meter lead?

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2006 Chevy Monte Carlo SS

Yes. There are actually two pink and black wires @ the ICM... I placed the ground end of the tester on the negative post on the battery and probed the other end where the wire connects to the pin. Tested for power with the key in the on position.. I've also checked for Crank and Cam sensors for power at the grey and black wires with the sensor unplugged testing directly on the connector, which get 10V from the ICM as far as I can tell on the schematic.

I just went back outside about 15 minutes ago to verify that no fuses were blown. I might have a bad connection while testing for voltage at the module.. I will unplug the module and test for voltage directly on the connector @ pink/blk wire. If it has power I'm going to assume that the module is defective out of the box(it happens sometimes).. and order another in.

confirmations... No power on any wires are the module.. tested with a known good test light... with the module unplugged. AS far as I can tell on my schematic... it is a direct line from fuse 6.. which I just triple checked.. and it's good. I really hate chasing wires... but I guess that it is necessary... is anyone aware of any short cuts to try to find a short? What else could have caused the module to lose power after running the car for only a few seconds? This one has me pretty confused.

Check for power at the fuse. If it's not blown, the short is not after the fuse on the harness. Check the power distribution block for any burnt wires or blown in-line fuses.

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The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67