97 Crown Vic slowed to a stop, almost

Was going down the road this morning and the car started going slower and slower, 60, 50, etc. I pulled it over to the side of the road when it got down to 20 and called a truck to come get me.
I know not much info, but that all I have. It's not the big fancy one, it's the single tail pipe one, and has been well maintained
Anybody have a clue
Thanks
Not sure why this posted twice,,,sorry

How long has it been since the fuel filter was changed? If it is partially plugged or mostly plugged, it can make the car slow down. Next would be the fuel pump. You need to have the fuel pressure tested. It should run between 32 to 36 psi at idle and raise approximately 10 psi with the vacuum line unplugged from the regulator. Lastly the catalyctic converter may be plugging up and restricting the exhaust flow causing the loss of power.

Thanks, guess I'll know today.
It just kills me to do this but had it towed to the dealer.
My regular guy couldn't get to it for over a week

Please post back with what was repaired. Thanks.

It was a vacuum hose, don't know which one, guess it will be on the bill. Will post back if you wish

Thanks for the reply. If you wish to post exactly what the repair was, that is up to you. Glad you have it fixed.

Possability fuel pressure, catalatic converter stopped up.air flow sensor