Check all of the above. Id also add the trunk weatherstrip and fenderwells.
I had a little hole on the passenger side fenderwell which leaked into the trunk and passenger side floor.

188k, both alternator and starter replaced once.

Still going, but its getting rusty....

When I changed my 95s starter, it was easy.
Dropped right down after removing the bolts and wiring.

Id replace the platinum plugs with the standard ones.
See if that fixes your ignition miss.

I also found a slightly wet trunk this morning, along with a rear passenger floor thats a little damp. Im drying everything out now and will start looking for the cause shortly.

Ill check the trunk switch first. Whats it look like???

The "Security" on my dash came on tonite.
Doesnt blink at all, just comes on and stays on. Car starts/drives normally.
Havent checked anything yet due to the bad weather. Any ideas???

The a/c evaporator should drip near the back of the firewall on the drivers side. You should see the end of a tube sticking out of the firewall lower to the ground.

If this leaks, the water would smell a little funky if it allows to stand for while. Just something to check before you tear into the ...

Coolant pressure tester might work in this situation.

One more thing to check is the little weep hole for the A/C system. My mom and dad had a Malibu that leaked from the little fitting, it dripped condensation onto the carpet.

Hate for you to tear out the heater core when its something like that!!

And check your battery cables for corrosion, especially the positive cable where it attaches at the battery. The cables are known for corroding, I've had this happen in 5 different Pontiacs, even when only a few years old. It can be difficult or impossible to tell from inspecting the cable's ...

repinS wrote:Happened to me a few weeks ago

A zip tie did the trick, it's been good so far.

Did the exact same thing, zip tie, about a year ago. Had washer fluid dripping all over my shoes when putting the zip tie on, but oh well.

all 5 of my bonnevilles had some power steering noise, even when i knew the pumps were not malfunctioning or bad. i always put in lucas power steering stop leak, each time it has brought the whine down to an almost imperceptible level.

I also used the Lucas power steering additive. Its a little ...

Had an old T-bird years ago which had the hard pedal problem. Was the brake booster.
Try that maybe???

Ive had the same problems twice, once was a dying fuel pump(it tested 17psi!) other time was worn out wires/plugs when I bought the car.

If that doesnt solve your problem, you might want to look for a weak coil or a vacuum leak.

alec_b wrote:
Oil change with lucas and good filter

Id just change the oil/filter, skip the Lucas and save some money.
Use any SL or SM-rated oil of your choice, oil alone should be just fine.

Ive thought about tearing mine down and figuring out why its messed up, but unplugging it stopped it from running all the time, so its stuck in the up position forever. I can live with it.

I ended up pulling the taillights and siliconing them back in.
Took care of my wet rearend!!

Just a question....

When you found the coolant low originally and re-filled it, was the engine warm or cold??

Remember to let the engine cool off a little before topping off coolant.
You can burn yourself with the rad cap, or crack the block/rad in extreme cases if you add cold water to a hot ...

The ICM ground was the ground I was referring to, not the ground on the fender.
Sorry for the confusion.

myfirstbonnie wrote:Have you checked or swapped out the ICM (ignition control module) under the coils?

I had the same problem over the summer, power loss when warm, rough idle too.

It was the ICM, the piece under the coils. Id clean the ground to the ICM, too.