I am posting this for Dan as he forgot his password and needs to get some help ASAP.
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OK so here are the basic facts on my issue.

Swapped in a 3800 sc almost 3 years ago, did a flawless road trip from mass to michigan and back. Then the car sat for about 2 years in my dad's garage under a cover with rat/ mouse traps and poison surrounding it.

Just got the car out here to Colorado, car started right up with a new battery, with out any hesitation. Drove the car for a few days in a row, no issues, then let it sit for a couple days and the battery died.

I pulled the battery and charged it. Today I put it in and began checking for current draw.

First inline reading was 0.53 A. (multimeter inline with + cable and + terminal). I then pulled each fuse individually and checked the current draw each time.

I saw only one change from 0.59 to 0.29 A when I pulled the CTSY/LID. 0.29A is still way too much so I began unplugging things.

Started with disconnecting alternator plug and main charging cable.-- NO CHANGE

Unplugged the two relays under the hood near the heater core-- NO CHANGE

Unplugged cruise control plug (rear DS of engine bay)-- NO CHANGE

Had some other things to do tonight so I stopped there, but I am also not sure where to check next? Unplug ECM? Radiator fan wiring? Headlight motors?

Anyone had anything like this before? My car has no power mirrors, locks or windows.
I would post this up on Pennock's but Cliff won't respond to my emails and I can't log in to my account... might have to create a new one.

Thanks for any help,
-Dan

Go after the starter, and the headlight circuit. Headlight motors seem to be big offenders.

The only circuits that are Hot at All Times:

1. Stop/Haz Fuse circuits;
2. Alternator;
3. High Speed Blower Relay;
4. A/C Power relay;
5. Bat Fuse circuits;
6. Fuel Pump Fuse;
7. Ctsy/Lid Fuse;
8. Coolant fan relay;
9. LH & RH headlight motor relays;
10. ECM;
11. Cold Start Injector Switch (if equipped);
12. Ignition Switch terminals B2 and B3 (the red wires)

You've already checked the first seven items, so that leaves you with the last five. Once you've narrowed down which branch is still drawing power, post your results and I or someone else can help you narrow down which component is giving you grief.

Its the starter, very common

quote Originally posted by Greenmeansgo: Its the starter, very common

I don't think I've ever seen a starter cause a 0.29a draw? I would try unplugging the ecm next. Maybe the ecm was wired wrong and has live power at all times on the wrong power inputs? I know you said you made a long trip with no problems, but did it ever sit more than overnight durring that trip?

quote Originally posted by Greenmeansgo: Its the starter, very common

I don't see how this could be the problem either. There's only two parts to the starter: the starter solenoid and the starter motor. The solenoid is only live with the ignition in start so that eliminates that. Next, the starter itself does have a main hot wire running to it, but it's effectively isolated from everything else until the solenoid closes the contacts to turn the engine over.

Its a common problem google it. If its not the battery or alternator then its the starter

Same as stated above.

The starter has no voltage going to it when not in use. With no voltage going to the starter itself, the starter can not be the cause of the drain.

The solenoid does have voltage going to it. When the key is turned to start, the solenoid extends the pinion gear and connects the voltage going to it to the starter itself.

However I have never seen a solenoid cause a battery drain as described. You need to look elsewhere for this trouble.

Had this same problem . Unplug the Batt fuse and check again. Mine turned out to be the memory circuit in my radio. Unplugged the radio harness and all was well in the Fiero world again.

Set your meter to measure amperage draw, and use the two probes to measure the draw with the fuses removed one at a time. BATT fuse supplies the radio, and a most of other on all the time circuits.

Thanks for all the good advice so far, I am sure it will help. Dan will be checking all of these options and I will post the results. If anyone has anything else to add please do, open to all suggestions. You guys rock