Pat..he'* still sitting on the same code. I think the best approach is to swap the coils around and see if the problem follows a specific coil. If not, check your battery connections for any corrosion or poor contact, also the connection for the ignition control module below the coils.

These cars are quite sensitive to voltage changes and do not like corrision on any connections. (I bought a tube of dielectric grease since owning a b'ville..and use it all the time.)

Update: Got a chance to get over to autozone today. They scanned it and what do ya know, found another code stored. P0171 was there, and the misfire as well. The lady that checked it mentioned that if it were her she would look into a new O2 sensor. If i understand right there are 2 on my car? I know about the one on the back of the engine where the exaust comes out but is the other underneath then ? Since the plugs + wires werent even changed at 100,000 like they were supposed to be (i got it at about 110K), it seems that the 02 sensor is past due for replacement. And can i get it out with just a regular wrench or do i have to use the special socket. Thanks to everyone for the input so far.

O2 Sensor info
Read that from TECHINFO

And yes, you can use regular tools, it'* just tight. Or buy a special wrench for about $15.

EDIT: Here'* another thread that discusses this from earlier today:
http://www.bonnevilleclub.com/forum/...ic.php?t=49157

You still need to fix the misfire , did you swap coils around .

Finally had time to swap the coils. Didnt get any change when i did however. Could they all be bad ? Because i am getting a random/multiple misfire code still. This weekend ill test them with a multimeter to make sure they arent bad.

Please use the coil pack troubleshooting Techinfo article and report your primary and secondary resistances back here. Look for corrosion on the posts of the secondaries.

Check the resistance of each plug wire and report them back here.

What did you gap your plugs to, and what do they look like today? Pull the front three.

Also...what brand of plug wire did you use.

Last year my bonne threw a misfire code. It was intermittant It had 60k on it so I changed plugs and wires. It happened again and it was same cyl as before. I swapped that cyl injector with the one next to it. About a week later it threw the misfire code but now on the other cyl so I new it was the inj. When it failed I could tap it with screwdriver handle and it would come back to life. I replace the one inj with an GM on and no problems since knock on wood. Just something else besides ignition to look at.

Checked resistance on coils today, secondaries came up around 6,000 ohms. But when we tried the primaries we got nothing at all.......used pieces of wire just like it is shown in the techinfo article. Also checked some plug wires, one was burnt on the end and another broke on the tip. Plugs were gapped at .60, just how they came. The wires are Duralast, very poor quality if you ask me. Which brand should i go with for new ones ? I hear that napa sells good plug wires.

Napa Beldans are good wires. What brand and type of plugs did you have in there? Remember that Bosch plugs do NOT work well in our cars for some reason.