Loss of power - any ideas?

I have a 205 XRDT which has given trouble-free service for years.
Recently it started to lose power intermittently - it's just as though I
took my foot off the accelerator, so it just ticks over. Then after a
minute or so it's back to normal. Full power is available when required,
unless there's none at all. I can feel the turbo coming in as usual.
It might be ok for several days, or happen several times in ten
minutes; either cold or hot. It always starts first time, even after
standing for a couple of days, so it does not appear to be air leaking
into the fuel line. No drips on the garage floor/on the engine, so it's
not fuel leaking out. I can't find any particular circumstances when it
happens - going uphill/downhill/round corners whatever.

I have:
1. Drained the filter bowl & blown out the fuel feed & return lines - no
problems.
2. The manual primer pump on the filter works ok.
3. There is no perceptible hiss on opening the fuel filler to indicate a
blocked vent to the tank, and while blowing out the fuel line I can hear
a hiss from the vent.
4. It has been relatively warm recently, so it's not going waxy.
5. Checked connections to the solenoid valve.

Any ideas, anyone? I'm stumped.

Dave

 

Does it have an EGR Valve?
I dont have a diesl pug but diesel ford CMaxs which have a pug engine have
well documented EGR valve problems with lots being changed under warranty.

Bob

 

I have a 205 XRDT which has given trouble-free service for years.

It won't have an EGR valve, but the manual primer pump on the filter does
often leak air into the fuel system when it's been there for a time. Had the
same problem on my 205D a few years ago.

 

I checked the primer pump - no problems there.
However, since writing to this newsgroup it's been running perfectly, so
it seems to have cured itself??? Maybe water in the fuel or something?
Thanks, Dave

 

no it because you asked the group and it found out ahahhah