Loading…
1
Honestly, that 2008 Duramax with the injector knock I tuned up in March just rolled back in sounding smooth as glass
Tbh, the owner finally switched from that bargain bulk fuel to a name-brand premium diesel with better additives. Anyone else seen fuel quality make that big a difference on an older high-mileage engine?
3 comments
Log in to join the discussion
Log In3 Comments
foster.drew7mo ago
Absolutely. My buddy's old Powerstroke was running like garbage, all rough and smoky. He finally listened and stopped getting diesel from the sketchy truck stop. A few tanks of the good stuff from a real station and it quieted right down, no more haze at idle.
8
the_julia7mo ago
Oh man, that "sketchy truck stop diesel" is basically fuel soup with some bad ideas mixed in. It's amazing how an engine will put up with absolute garbage until it just can't anymore. Your buddy's truck was basically coughing politely for months before it finally gave up and started writing smoke signals. Good on him for finally feeding it something that didn't come out of a mystery barrel.
6
angela_kelly4mo ago
Not sure how that fuel gets past the filter without causing chaos, but somehow engines just roll with it until they hit a wall. @the_julia you nailed it with the smoking signals picture, that's exactly what my buddy's Cummins did before the injectors started tapping out. He was chasing all sorts of weird issues for months, water in fuel and garbage combustion, before he finally swore off the place with the faded diesel sign. A couple of clean tanks later and the whole rig felt like it stopped holding its breath. Really makes you wonder what kind of concoction they were pumping.
5