6.5 Stumbling
 

Hey all - I have a 98 3/4 Chev 6.5TD that is acting like it's running out of gas(fuel tank is almost full). It will start and run great, then about 3 or 4 mins later down the road it starts to sputter and stumble and then die. It will restart, not immediately, but then will run and do the same thing. I relocated the PMD about a year ago, and just today changed fuel filter and air filter hoping that would help things. Any ideas? Thank you for your vast knowledge on here!

check the Lift Pump on drive side frame under driver door make sure it pumping fuel

x2 and just because it is buzzing doesnt mean it is working

ya mine doesnt make a buzzing it is more like a thumping noise. and i know it works.