AWX cold running lumpiness

[Evil]

In the last couple of weeks, and only from cold..
Slight rough startup (but immediate, no struggling to start at all)
Then, in the first ~5 minutes, between 1 & 3 times, it chugs like a mofo for a few seconds (and if I power through, there's loads of light coloured (grey I think) smoke)

Soon as the temp gauge starts moving it's fine.. no issues at all.

I've done a 1 litre diesel purge (chugged the whole litre at 2k+ revs, the dregs of the purge liquid were dirty) and also tried priming the fuel a few times before starting..
Air, fuel and cabin filter are less than 5k miles old. It could probably do with an oil/filter change..

Been googling since it started and have read numerous similar threads but none have provided a fix.
Some even say its normal and theirs has done this, in colder temps, for nearly 50k miles - doesn't seem right to me.

Ideas anyone??

93/93

[Gazwould]

Glow worms ?

[Hilly81]

My 05 AWX, 151k was similar (though not as bad) recently. Moody in the cold mornings. Took longer to start (still always first time though), but lumpy when started and quite smokey. Changed the plugs last Wednesday to done Bosch ones and it’s infinitely better now.

[Evil]

I'll grab some glow plugs...

Always default to fuel/injectors/pump (lift or tandem), some sensor or other etc..

Never consider plugs... Here's hoping

93/93

[Hilly81]

I'll grab some glow plugs...

Always default to fuel/injectors/pump (lift or tandem), some sensor or other etc..

Never consider plugs... Here's hoping

93/93

For £30 for the 4 it can’t hurt.

[Evil]

I'll grab some glow plugs...

Always default to fuel/injectors/pump (lift or tandem), some sensor or other etc..

Never consider plugs... Here's hoping

93/93

For £30 for the 4 it can’t hurt.

True (although I'm used to paying a fiver for genuine spark plugs - never bought glow plugs before)

Looking to get Bosch once I find which type I need...

Be made up if it fixes it... might even keep it a while longer..

93/93

[Gazwould]

I did the research before I needed them , and still don't , lol .


https://ukpassats.co.uk/phpbb/viewtopic.php?t=91485

[Hilly81]

I bought these: https://rover.ebay.com/rover/0/0/0?mpre ... 2891145189

[Gazwould]

Why Beru over Bosch.....?

[MiniMental]

Just to throw a spanner in, I bought NGK Been brilliant.


54 Passat Wagon PD175
99’ Audi S4 Avant 2.7 QTO ;)

[Evil]

Gah!! Too complicated.. I'll look at them after the bah humbug season.

93/93

[Gazwould]

[Hilly81]

Why Beru over Bosch.....?

I didn’t really have any preference to be honest mate. Saw good reviews for the Bosch, looked an ok price so went ahead. The ones in the car were all probably original so anything was an improvement to be honest.

[Gazwould]

Oem is actually Beru or Bosch .

[Evil]

Now am looking at this..

The 2 options (which are different lengths) are
Construction year from: 02/2002
Chassis number from: 3B..2..350 001
https://www.euspares.co.uk/parts/bosch/672141

and:
Construction year to: 02/2002
Chassis number to: 3B..2..350 001
https://www.euspares.co.uk/parts/bosch/1148354

My car is
Year : 2004
Chassis : WVWZZZ3BZ4E311005

Glaring observations (that could be about to make me look incredibly stupid)..
From MY I'd need option 1
From chassis I'd need option 2
Both types have a '2' in the chassis number... I don't.

Not looking to buy from euspares, just wanting a bosch part number.

Help?
**I have clicked on links contained in relevant threads **

[Jultsu]

WVWZZZ3BZ4E311005

The bolded number tells you the model year of the car, 2004 in this case. In both of the options the cutoff point is within MY2002 cars (Chassis number to: 3B..2..350 001) so you will ofc need the "from 2002 onwards" -option.

[Evil]

Ok.. But..
(And I need to preface this with saying chassis numbers have always confused the heck outta me)

The 02-> part is for chassis no. 350001->

My chassis number is <-350001

Have I missed something?





93/93

[draycote flyer]

If you have access to a multimeter they are an easy test
Cheers Craig

[gtijames]

Best way is to check number on the ones fitted at the mo, just pull one and get the part number fitted to compare

[Evil]

Yup.. I agree..
But I prefer to dismantle just once so if I can order parts before the spanners come out that's favourite..

93/93

[Burnzybubbles]

To be fair, the first couple of plugs are very easy to get to, cover off and a 1/4 ratchet with deep 10mm socket then just go easy

[Evil]

I'll probably leave it about a week tbh. . Then I can pull it off the road for a bit, at the moment I'm daily chauffeur to my eldest..

Not even looked at where the glow plugs are.. will any gaskets need replacing??

93/93

[gtijames]

They couldn't be easier to remove, right hand side of engine as you look at the front. Outside the head just got a row of black loom going to them that pulls off with a pair of pliers. Then out they unscrew

[Evil]

Finally pulled a plug and got some ordered.. They should be here today.

Never seen a used glow plug before so don't know what a bad one looks like

Really hoping it sorts the problem..

93/93

[Evil]

Seems to be sorted..

Found 2 leads like this..

Blobbed some silicone on them, hopefully they won't be a problem later on..

93/93