i just picked up and 87 LE this week with only 74k original miles, it was running rough at first so i changed what i could afford after all the fee's and insurance.
I replaced the air filter (old one was black lol) changed all the plugs and put it autolite 605's gapped to .045 which is what is says under the hood, put on napa belden 8mm wires (the blue ones), and changed the fuel filter. It made a dramatic difference, i can feel that the pick up is alot faster than it was. it is running a hell of alot better, but it still has a slight misfire and its burning more gas than my 2000 SSEi i am going to replace the coil pack next when i get paid. any advice on where i can search next and a recommended brand of coil pack for that year?

Go to a junkyard and get the ignition control module (what the coils bolt to) and coils from a Series I or II v6 car, I don't believe it matters which car it is from. This is a direct bolt in and has hotter spark and more accurate ignition, IIRC. If it is indeed your coil, it will fix that issue, as well as slightly improving throttle response and power from stock.

You'll also need the mounting plate. viewtopic.php?f=44&t=1684

I have everything you need, send me a PM if you're interested.

i got one from a 94 buick with the tuned port 3800 with the 8th vin "L" but the connector from the old magnavox module dont quite fit, some of the ribs are in the way, is this actually going to work when i install it?

my old coil pack is mounted above the firewall side valve cover does this matter?

Can you get some pictures of everything you have?

i dont have a camera unfortunately, that why i dont have pic in my signature lol. im just finishing eating some mc donalds and then im going to finish the install...

i got it wired up... no start

Are you sure you got an ignition module from a 3800? The coils are all the same connection wise, but the modules are different. Look at the pins. The 3800 uses all of them and the 3100 does not use the space on the far left of the connector (it will have a hole in the rubber insulator and no pin if it is from a 3100).

I know this because I have one from a 3100 sitting here in my garage that I got when I did my swap.

Talking in chat, Don thinks he needs a 3300 ICM.

im going back to the junkyard tomorrow to get a 3300 module, and well see if that does it

IIRC this was an easy swap on my 88 SSE. Is there a difference in that one year?

Yes there is a difference

i went back today i got the module out of a 90 buick century 3300, i had to switch the position of the 1/4 and 6/3 coils and i started right up.. no more misfire!!!
ISSUE RESOLVED THANKS TO JRS3800 YOU ARE THE MAN!!!!!

We have been saying that for years. Glad you got it up and running.

Now............................how about some pictures posted in your rides area.

no camera

Yay for you!!! Yes, Don is the man.

Oh no, the misfire is back. i grounded the diagnostic terminal and got a code 12 which means no stored codes lol... so im not sure where to go from here?