Just swapped the fuel filter on my cousin's 98 GMC C1500 4.3. ~4-5 year old unknown filter off, Microgard filter on. No issues prior to changing the filter. Immediately after changing it, it cranked for a good 8-10 seconds then fired. I said "okay, it needed to replenish the lost fuel in the lines/re-prime. No big deal." No leaks. The old filter was leaking black fuel out of the "in" side, so it was clearly overdue.
Now EVERY cold (50-75 degree temps) crank takes 5-10 seconds before firing and he complains of smelling fuel, and it's quite strong. When warmed up, it cranks like normal. No issues. Prior to the filter change, every start took less than 1 second.
Surely this means it's a bad filter...right? These issues seem backwards from what they should be. These sound like before you change a fuel filter. Not after. If it's not the filter itself, what could it possibly be?!? It doesn't make sense that it would magically start showing unrelated problems at the exact moment the filter is changed. Any ideas? Thanks in advance!
Now EVERY cold (50-75 degree temps) crank takes 5-10 seconds before firing and he complains of smelling fuel, and it's quite strong. When warmed up, it cranks like normal. No issues. Prior to the filter change, every start took less than 1 second.
Surely this means it's a bad filter...right? These issues seem backwards from what they should be. These sound like before you change a fuel filter. Not after. If it's not the filter itself, what could it possibly be?!? It doesn't make sense that it would magically start showing unrelated problems at the exact moment the filter is changed. Any ideas? Thanks in advance!