'87 Dodge Van B250 318 - sat for two years, fuel system/everything rotted, replaced tank, sending unit, fuel pump and filter, lines replaced, ECM, caborator, distributor, plugs - starts easy, engine sounds great/smooth UNTIL it runs on the highway, after about 10-15 miles it will stall out, it restarts but then stall again. Swithed to electric fuel pump and by-passed ECM with manual distributor, problem still not resolved. Any other ideas?
Stalls at Highway speed on 1990 Dodge Ram Van B250
by dodgevan in San Antonio, TX on January 05, 2011
ANSWER by Johnny Mopar on January 07, 2011
I sounds like your fuel filters have clogged up, even though you have replaced them. The intank filter is especially vulnerable to clogging restricting fuel flow under load.