This is an intermittant problem. Sometimes, when I load up the motor, it starts to pop/sputter and there is a noticeable lack of power, when I back off the throttle a bit the car takes off. It almost feels like when you hit the rev govenor. I thought I might have been looking at water in the gastank, so I put some gas treatment in when I fueled it up. Now at 3/8 of a tank, it'* doing it again. Do the coil packs weaken, or do they just fail? The plugs only have about 6k on them. Any advice will be appreciated.

do you have a check engine light on?

change the fuel filter. Located under the right rear door on the inside of the frame rail., $15 and a ten minute job.

Bet it'* plugged.

No.

Agree with Bob on this one. Check the fuel pressure if possible. Mortehl had the same type of issues and found it to be fuel pressure.

I only wish he changed the filter before the pump.

I'll try this next.

Merlin, here'* a good summary from my situation on what to do:

http://www.bonnevilleclub.com/forum/...hlight=#484617

Please note the fuel filter at the top

And to take Don'* suggestion a step further...

When checking for fuel pressure, slightly push on the accelerator cables on the throttle body to race the engine. Quickly, but not a lot, rap on it. Your fuel pressure shouldn't dive much. Not the differences. If it goes down by much, say to ~ mid 30 lbs. of pressure, it'* likely a pump failure.

I had this exact same issue with my 99 (lack of power at higher RPMs) and it ended up being the pump....as determined by this very test. She runs like a champ now.

Fuel pressure would be my first bet as well, however I had missing under load issues as well that were finally traced back to a cracked spark plug insulator. If the fuel pressure idea doesn't pan out, this would be a good place to look next.