From: Glenn Shaw (mpmutt@mtaofnj.us)
Date: Wed Aug 11 2004 - 08:18:19 PDT
Hi
If your filter has been in place the whole time and you have been
careful when changing it you will not have particles in your injectors.
You should first pull the plug on the bottom of the fuel tank and make
sure you have all the crap out of the tank, messy job. Be advised you
may want to have a new rubber plug on hand when you do this. They fall
apart easily when old. If it does make sure you get the end of the old
rubber plug out of the tank. Second change your fuel filter again. If
you still have problems the next step is to look at the inj pump and
injectors. Deisels are VERY power sensitive to filter restriction. If
you have water and other crap in the tank it will ruin a new filter very
fast. The tank must be clean.
Glenn
M1043
MTANJ MVPA
-----Original Message-----
From: Darrell Ramsell [mailto:daram@comcast.net]
Sent: Tuesday, August 10, 2004 8:49 PM
To: Military Vehicles Mailing List
Subject: [MV] Disel 6.5L engine problems
Gents
I have a HMMWV M-1044 with a 6.5L Diesel engine. I've been having some
sporadic problems with minor loss in engine power. Some days the engine
runs just fine and I can actually go up a hill and hold the speed at
55mph. Other days it seems like it's struggling a little. I can still
get it up to 55mph on a flat surface but speed drops on a hill climb.
On a good day the exhaust seems to be clear but on a bad day it blows
out some white smoke mostly at high RPMs. When white smoke increases
power drop becomes more noticeable.
Now I bought the vehicle two months ago. The previous owner put a new
engine that only had 800 miles on it when I bought it. I took it on a
500 mile round trip two weeks later. It ran just fine on the way out
but on the way back is when I began to have troubles.
First thing I did I changed the fuel filter and it was covered with crap
that looked like little rust flakes. MY assumption is that these rust
flakes came from the previous engine. (The previous owner had told that
the original engine was in bad shape which is why he replaced it). The
new fuel filter help a little but not much. I just check fuel filter
today after putting 1,000 on it and the filter looks very clean. During
that time I've ran almost every tank of gas with diesel fuel cleaner/
water remover. I've also been periodically draining fuel from the fuel
filter well and there has been very little sign of rust flakes or water.
Despite all this my problem persist.
My assumption now is that I have some sediment in the fuel injector pump
or the injectors themselves and occasionally restricting fuel flow. My
other assumption it that my fuel injector is going bad.
Since I'm not much of a engine mechanic, I'd very much appreciate if you
can help me trouble shoot this problem and let me know if my assumption
are correct or if it's something completely different. Any advice will
be helpful.
Thanks
Darrell
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