S70 TDI injector pump troubles

Hi,

My 1997 S70 TDI starts with way too much (grey) smoke. My mechanic is
pretty sure that my distributor pump (VP37) is broken and he tells me
the probleem will get much worse. If it's just the springs that are
broken it will cost me 550 euro's ($770), but the repair can cost upto
1300 euro's ($1800) if there is more damage in the pump itself.

Is there any way this can be fixed cheaper? Can I fixed it myself with
cheaper parts? I'm pretty handy with cars, but I never dealt with pump
internals.

Thanks,

H. Bouwmans,
The Netherlands

 

Hi Bouwmans,

Try here, it is half price for a new item:

http://cgi.ebay.de/Einspritzpumpe-D...ryZ61258QQrdZ1QQssPageNameZWD1VQQcmdZViewItem

Best regards
Per

 

Hello.
Does the car run OK after initial startup?
I suspect it does. If so, tell your mechanic that he is completely
useless, and has missed the most basic problem with a diesel engine.
Then, go buy some new glow plugs, and a 10mm deep socket and fix your
problem!
Stories of broken springs in the injection pump are an absolute joke.
Sorry, but lots of people seem to be getting ripped off by so called
'diesel mechanics' these days.

I have fixed several cars with this smoky startup problem over the
past few days. Strangely, most of the people have been to their main
dealers with starting problems and have been told that they need
expensive repairs.
Main dealers don't seem to know anything about diesel engines these
days, and glow plugs don't show up any fault codes. They are only used
for starting in cold weather, and they're cheap and pretty easy to
replace.
By the way, the glowplugs are located next to the injectors, on the
front of your engine, and they have a heavy cable bridging all 5
plugs. The cabling just pulls off the glowplugs. It sticks on tight,
but really does just pull off like a spark-plug lead.

Hope this helps.
I can't imagine you have any serious problems. I've done 370,000 miles
on the 2.5 tdi engine, spread over 2 V70s, and I've never come across
injection problems.
Lovin the cars still, and glad to see the group is still in good use.
All the best.
Joe.
P.S The E-mail address doesn't work. Contact me via the group pls.

 

If one injector had a broken spring, could it cause it to sound like
its "misfiring" at lowish engine speeds ( up to say 2000rpm) ?
Also, at night, when accelerating hard, there is quite a bit of
exhaust visible in the following cars headlights as if its
overfuelling. It does seem to be very lively, and fuel consumption
is still quite good ( 40 to 43 mpg UK when driven quite hard)
Mileage is 168,000 and Tim did say the injectors were past their
best a while back but haven't got round to having them overhauled
yet.
Thanks,
Nick

 

Once warm, the answer is yes.

I have already replaced them myself. I also made sure the circuit worked.

The injection is also delayed, possibly by the low pressure from the
distributor pump. That made the mechanic think it was the springs in the
pump.

Currently a new problem has arisen. The return line is leaking diesel.
So I came up with a new diagnosis. The fuel line going to the pump has
too much pressure, the line coming from the pump has too little
pressure. That makes me think there must be an obstruction in te pump. I
called my mechanic and he found my theory plausible. There is some kind
of valve inside that can choose to take diesel auto of the tank or out
of the return line. That valve might be stuck or obstructed. I will
bring my car to my mechanic next friday. Hope he can fix the car by just
using a hammer