rough idle after freeway driving

[TheCrippler]

Hi,

Lately my van has been hard to start in the morning, (its slightly colder than normal but not that cold here in Los Angeles low 50s) and then after driving for 10 miles or so at high freeway speeds I notice that the van idles real rough/almost stalls when I come to a stop. By the time I get to the next stop light or rev the engine a few times the problem seems to go away. Once the van is warmed up I don't have trouble starting it the rest of the day, its just that initial start in the morning. I also dont notice the low idle when driving around town, its just after the longer distances at constant high rpm.

1989 townace 2c-t There are only 84k kilometers (53k miles) on the van. I'm thinking maybe dirty injectors? I was reading on some other diesel truck forums about dirty injectors and similar symptoms. Any thoughts on where to start? It feels like a fuel issue, pressing the gas down on start up gets it to start and revving it clears the low idle. seems starved for fuel. Is there more than one fuel filter on these vans? The only one I know about is the big water-separater filter with the priming pump on top.