I have a 99 suburban 6.5L turbo diesel with 95K miles. Back in Feb. while driving the engine would "stutter" meaning it felt like a momentary loss of power and you felt like the truck was going to stall. Over a period of about to weeks this problem got much worse and included very difficult starts where I would have to crank th engine for 10-15 seconds 3 or 4 times before it would start and then it would idle very rough or stall. Anyways I finally had it towed to the dealer and they replaced the fuel lift pump and fuel filter. The problem seemed to solved, but I swore that the start ups and driving were not as smooth as it was before these problems began. My wife told me it was just my imagination and that it was fixed, but yesterday about 2 months since the lift pump was replace the stutter returned. It did it about 4 or 5 times in 10 miles of hiway driving.
My question is, if the lift pump is bad again there must something causing it to go bad hence my feeling that it never was quite right. Any ideas would be greatly appreicated.
