Recently the power from my 2002 Diesel has become inconsistent. If the
truck sits for a day or two, it take a mile or two before it feels normal as
far as power. While driving this first mile or two, the engine just seems
to lug. This is with no load in bed or trailer. This has a manual trans, so
you can normally feel the torque through the gears as you shift. I use this
truck mostly for commuting. Today while coming of the Interstate after about
a 20 trip, the same symptoms again. These cleared up and I was able to
drive home. Call the dealer, asked for a possible explanation of cause. He
was at a loss. The truck has 65,000 miles, could this be a fuel filter
Any ideas would be appreciated.
Seconded... get the fuel pressure checked. And find another dealer.... any
dealership who doesn't immediately suspect a lift pump when confronted with
unexplained power loss on a 2nd gen 24V has little to no diesel experience.
It's a 12V electric pump, mounted to the left-rear of the engine, that sucks
fuel from the fuel tank, and feeds it to the injection pump. The injection
pump is a high-pressure, mechanically-driven, electronically-controlled pump
that supplies fuel to each cylinder's fuel injector. It relies on a
constant supply of diesel fuel for lubrication.
If the lift pump starts to fail, and can't keep up with the demand for fuel
that the injection pump needs, you experience a loss of power. You also
starve your expensive injection pump of the lubrication it needs, and the
pump eats itself up, resulting in a repair cost of over $1,000.
So, find a place that can service a diesel vehicle, and have the lift pump
tested and replaced, if necessary - the sooner, the better.
Other posters suggested the lift pump. I had guages installed on my 2001
w/100k miles and immediately noticed the pressure (should be 5 psi or
more) would go down as low as one psi - again, no load, no trailer.
I replaced the lift pump myself. Cost around $200. Now it is 15 psi at
idle and does not go much below 10 psi.
I understand the lift pump is no longer sold (I had to go to Cummins).
The fix now is what Cummins originally reccommended, a pump in the tank.
so you run yourself low on diesel fuel and for about $500 (what I paid
for the EGT and lift pump pressure guages w/installation), they replace
the lift pump with a pump in the tank which apparently solves the
OTOH, you can buy the same lift pump from CarQuest, but with a different
wiring. So you would need to splice the wiring from your old pump to get
it to fit.
In the meantime, you may be starving the last two cylinders of fuel and
damaging them, not to mention the main injection pump which costs around
$2k to replace.
Get it done real soon! If you replace it with another lift pump, get the
gauges so you know in advance next time.
John A Reichert wrote:
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