On Monday, January 30, 2006, at 01:47 PM, Luther Gulseth wrote:
My SD has it's moments of fuel pressure loss. You can be crusing down
the interstate and suddenly feel a power loss that lasts less than 1/2
second...something exactly like taking your foot off and back on the
throttle. Also, at cold start it's very rough and needs to have
enough throttle to keep at least 800-900 RPM to run somewhat smooth
and not die. Glow plugs are barely 2 years old and the injector pump
and injectors were replaced by the P/O (maybe 50kmi ago). I've
replaced all the rubber fuel line from tank to primer in the last 8
I'm thinking from my experience in the semi-diesel world that I have a
lift pump that's weak. I read 07.1-145 "Checking fuel pump and bypass
valve" and it seems that the bypass valve can get clogged and needs to
be cleaned and the spring lengthened to increase tension. Is there
anyone else that has had an issue similar to this where cleaning the
bypass valve fixed the issue or did they have to replace the fuel > pump?
(btw fuel, primer, & lift...they all mean the same thing in the big
Have you checked/cleaned/changed the primary filter? They can and do
clog and I'm sure you know the car will run as you described. The
secondary (spin-on) filter can clog too but is less likely to.
Silly question: Could you be low on fuel? I've had some lying fuel
gauges cause me to run low. How about water in the fuel? It happens.
I Mac Therefore I am