Gentlemen (and Ladies if any are present),

My 91 Pajero that I drive has experienced an extreme loss in power over the last 6 months. I can put my foot to the floor and count to 5 slooooowlyyyyy before I accelerate.

Seriously.

I can feel the turbo kick in once the RPM reach 2000 or so but even then it's not the kick in the pants that I used to get or that I get in my other Paj. I changed the fuel filter, thinking that might be the culprit but it made zero difference. Pulling my Tent trailer I'm lucky if I can hit 90k on the flats foot to the floor for hours on end. If I have a head wind I'm relegated to 80k if I'm lucky. Don't ask me what it's like when I try to climb a hill!

There's no black smoke anytime ever. If I let it idle there's blue smoke after 4 or 5 minutes once it's warmed up.

Thoughts?

Please?