Bad 'miss'

Peugeot 306 D Turbo - 1999

When started from stone cold has a really bad misfire - starts no
problem, but struggles to build up revs and is a bit smokey (grey-ish).
Foot to the floor and the revs build slowly due to the misfire, then,
when it gets to about 2200rpm, if you hold it there or above for about
15 seconds, the miss clears itself and the car is fine. It also like to
give a nice big puff of black smoke when accelerating moderately hard
when it hits about 2000rpm? Someone been tampering with the fueling and
turbo boost perhaps? It does seem a good bit quicker than my last TD.

 

Sounds like one or more duff pre-heater glow plugs. Misfire disappears
when cylinder heat is high enough to ignite fuel.

 

Hi,

Agreed. First check to perform is glow plugs.

Regards,
G.T
205 Diesel & turbo-Diesel : www.205d.com

 

Cheers Keith, I'll get new glow plugs for it at the weekend. The smoke
at 2000rpm when the engine is hot isn't the same problem though, is it?

 

Just a guess, but that could be the turbo because it kicks in at 2000rpm.
My wife's 306DT puts out a black puff when she puts her foot down. I shall
have to watch it and see if it is mainly around 2000rpm, I had not thought
of that before. Having said that it has done it for years and goes like a
pocket rocket.

 

Hi Keith,

I was going to write the same.
The turbo kicks in, and due to mixture enrichment (spelling ?) and the light
extra pressure in the exhaust it also tends to remove the burnt particles
which are stuck along the line, this producing a black smoke.
You can have the same with a HDi, and we all know they don't naturally
smoke, due to their electronics with controls all that.

Regards,
G.T
205 Diesel & turbo-Diesel : www.205d.com

 

Thanks GT, and your spelling is fine. ;o)

 

Hi,

Eeeer, no.
Read "which controls all that".

I'll add some useless info : here, sometimes, the compressor part of a turbo
is called "blower" (soufflante in french), which may also be the generic
term for any charger (including the classic superchargers like Roots).
That's some kind of uncommon slang, but for what we're talking about, I
guess it takes all its meaning
For example, my parents' almost new 206 HDi (2.0 HDi "Eco", 120g - 2002
45,000km) tends to puff some black smoke upon acceleration. I'm sure it's
some just kind of crap being blowed out of the exhaust - anyway it runs like
a dream. Eeeeer mum, gimme your car on a tour around Paris, 300 miles of
motorway driving would clean all that

Regards,
G.T
205 Diesel & turbo-Diesel : www.205d.com

 

That was a grammatical error. The spelling of 'with' was fine, it was
just the wrong word ;o)

I've driven around the Peripherique. You wouldn't get up enough speed to
blow the crud out.

Message for G.T.'s Mum --- Hide the keys! ;o)

 

Hi,

Depending the time you drive on. I've driven at many different times
(between 7AM and 2PM, including 12H... But I have 200km motorway drive ahead
before putting my tyres on the BP
Last time I drove on it it was 15 past 12 AM, from southern to northern
(Porte d'Italie to Porte Maillot), I had a pretty fine drive (70 to 80KPH),
I shouldn't complain

LOL ! Don't worry, my 205D is just fine for this kind of use ;-)

Regards,
G.T
205 Diesel & turbo-Diesel : www.205d.com

 

You must try our M25 sometime. In peak hours it is more of a circular car
park.

 

Hi,

Hey, the Périphérique is nothing more at certain hours. I've known that
too... And if I am lucky enough to know that once again, I'll sign up.
Come on, the rush hours means big jams, wherever they are.

Regards,
G.T
205 Diesel & turbo-Diesel : www.205d.com

 

So the black smoke is ok then (excuse my intrerruption of cross-channel
traffic news) and there's nothing needing done?

It does kinda piss me off because the car has a lovely stainless steel
exhaust on it which is continually covered in black soot. Never mind,
as long as it does the 1000 miles a week that it's currently doing
without any problems, I can live with a dirty exhaust I guess - thanks
guys.

 

Hi,

No. Just drive. You can attempt to push a little the car to force the
"cleanup" of internals, do it with a fully warmed up engine and don't forget
to drive fine for a few miles before stopping the engine, for the turbo to
cool down.

Anyway you'll have a blackened exhaust : there are just the Diesel rules.

Regards,
G.T
205 Diesel & turbo-Diesel : www.205d.com

 

Alternatively fit a matt black exhaust nozzle ;o)

 

I did try the glow plugs but it never made the slightest difference - I
guess it's into the local diesel specialist with it now. One thing I
have noticed though - it's considerably better now that we are getting
warmer, drier mornings; almost to the point that it's negligible, but
still there. If it's a cold and damp morning, it's still bad -
missing, smokey, etc.

 

Like to post back here when you have the answer? It sounds intriguing.
--
Keith Willcocks
(If you can't laugh at life, it ain't worth living!)

 

I found out what it was this morning - white smoke and low water - head
gasket has gone!!! *Gulp* How much should this cost to get fixed
assumming the head has to be skimmed, etc?

 

If no-one replies with a cost estimate, keep an eye on the thread "peugeot
306" as boxy is asking the same thing.

 

Worth shopping around for anyway..... ten estimates, all based on what
you would probably call worst case scenario - lowest estimate
£250-£350 (guy works on his own out of a workshop at the side of his
house). Highest (fancy workshop in Aberdeen) £600-£800!!

I've never seen a poor farmer but, on saying that, I've never seen a
poor mechanic either. ;-)