Hey John, A 1993 308D? European van?
Anyway, if it is a diesel, then the first step is to check your fuel filters. My experience is change them every 15k miles. Also possible, is that the screen in the bottom of the fuel tank could have algae, yes algae, clogging it up. But first check the fuel (and air filter while under the hood.) Always check the basics!!
I have a 1993 308D, it is suffering from a lack of power and struggles to reach 60 mph.
power loss is apparent through all gears and
the van has done 110,000 miles, any answers please