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Model specific boards => Golf mk4 => Golf mk4 TDI => Topic started by: NoCrap on 15 June 2011, 22:08

Title: Smoke & misfire - SORTED!
Post by: NoCrap on 15 June 2011, 22:08: Hey all,
I've got a problem with my PD115 (AJM) mkiv that i'm trying to get to the bottom off.
It's been running fine then just over a week ago it all of a sudden started puffing white smoke and misfiring.

I've had it in various pieces to see if i could find anything obvious...

Injector loom appears to have continuity when tested with a metre.
cam belt is in good shape
fuel filter has been changed and primed with diesel treatment

2 x minor coincidences

1 - a minor oil leak from an unknown location which has been happening for a while now
2 - put about 15 litres of V-Power diesel in about a week previous (as it was the only one available)

has anyone else experienced such issues? i've got a feeling i'm just missing somthing fairly fundemental....

Thanks
Title: Re: Smoke & misfire
Post by: Rhyso on 15 June 2011, 22:10: Checked all the boost pipes and clips are intact and in place?
Not got oil mixing with coolant

:undecided:
Title: Re: Smoke & misfire
Post by: NoCrap on 15 June 2011, 22:14: Sorry - yes all have been checked...

I'm going to run it up to temperature tomorrow to see what happens
I'll also whip off the expansion tank cap and see if i'm getting any bubbles coming through
Title: Re: Smoke & misfire
Post by: Adam on 23 June 2011, 00:42: Low fuel pressure or low compression quite possibly.
Title: Re: Smoke & misfire
Post by: Agreeable Slick on 23 June 2011, 12:30: White smoke an missfire usually means there is a timing issue. See if you can get a garage to Vagcom it, and adjust the timing slightly.
Title: Re: Smoke & misfire
Post by: darren1.8t on 29 June 2011, 20:06: i had the same problems mate and after a while it ended up being the dreaded head gsket :angry:
Title: Re: Smoke & misfire
Post by: NoCrap on 02 July 2011, 08:22: Compression test done....... cylinder three has zero compression! all the rest are almost spot on 30 bar
Title: Re: Smoke & misfire
Post by: Adam on 02 July 2011, 12:36: Quote from: NoCrap on 02 July 2011, 08:22
Compression test done....... cylinder three has zero compression! all the rest are almost spot on 30 bar

Oh dear. Whip the head off...
Title: Re: Smoke & misfire
Post by: NoCrap on 04 July 2011, 17:22: Piston three is cracked! arse
Title: Re: Smoke & misfire
Post by: Rhyso on 04 July 2011, 17:24: Quote from: NoCrap on 04 July 2011, 17:22
Piston three is cracked! arse

:shocked: :shocked: :shocked:

Any idea what caused that?
Title: Re: Smoke & misfire
Post by: NoCrap on 04 July 2011, 17:34: I have absolutely no idea - it's always been well looked after and serviced using the correct oil..
my only thought is that is has had a minute crack in it for a long time that suddenly just got better.
the previous owners have definitely had the head of it before for one reason or another, nothing in the history about it though
Title: Re: Smoke & misfire
Post by: darren1.8t on 05 July 2011, 19:48: service history dont mean sh!te mate!!! my mate bought a a3 tdi with full history then he found out it was all wrong !! the miles the services never happened etc!! good luck m8!! :wink:
Title: Re: Smoke & misfire
Post by: NoCrap on 09 July 2011, 06:51: Has anyone got an understanding of whether VW use the same pistons in all their TDI blocks?
Title: Re: Smoke & misfire
Post by: darren1.8t on 15 July 2011, 06:12: im sure they do m8!
Title: Re: Smoke & misfire
Post by: NoCrap on 21 August 2011, 09:02: Right - some significant progress has been made!

I managed to source a brand new non reconditioned AJM engine for an absolute bargain price.
I've been building it up over the last few weekends and managed to get it back in to the engine bay yesterday!
Just a case of plugging things back in again now and firing her up for the first time.

(http://i110.photobucket.com/albums/n89/timlineuk/20082011611.jpg)

also a little challenge; can anyone guess what this is?

(http://i110.photobucket.com/albums/n89/timlineuk/20082011608.jpg)
Title: Re: Smoke & misfire - PROGRESS!
Post by: NoCrap on 21 August 2011, 09:08: Oh, and also for reference the pistons across the PD engines are different - the 130 and 150 ones are possibly the same as each other but the others produce different compression ratios
Title: Re: Smoke & misfire - PROGRESS!
Post by: NoCrap on 17 September 2011, 07:41: Hopefully almost done! found that the injector from cyl3 is shagged... no wonder the injection timing was such a pain to set!
collecting a replacement today and chucking it in, fingers crossed it'll do the trick!
Title: Re: Smoke & misfire - Sorted!
Post by: NoCrap on 02 November 2011, 19:50: Had one final issue of a faulty injector - fitted a replacement last weekend
car now runs beautifully!
Title: Re: Smoke & misfire - SORTED!
Post by: mikemk4gti on 13 November 2011, 20:52: whats the second pic then.....?
Title: Re: Smoke & misfire - SORTED!
Post by: NoCrap on 13 November 2011, 21:54: Well - as no one seems to reply on this part of the forum.... it's the internals of an air conditioning compressor - a fantastic bit of engineering and just show why they cost so much
Title: Re: Smoke & misfire - SORTED!
Post by: mikemk4gti on 14 November 2011, 07:09: I thought it was some sort of aircraft engine :)