my h1 2001 starts and runs fine but stalls on the highway. also stalls at times when i slow down. any clues?

 

things to check....

fuel pump - is the wiring good, is the pump good
PMD possibly need it replaced

likely those are your source(s).... you might want to post this type of a question in the H1 forum to get more responses....

 

phazer is dead on. PMD and fuel pump are most likely cause of your stalling. Could check the fuel filters also.