Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Aggressive engine sound
#1
After a bit of help/any ideas. My estate in the low revs sounds very aggressive/diesel knock. I would says it sounds a bit like a xud when running to much advance. It does it when picking up from the low revs from about 1000rpm up to 2000rpm then seems ok for the rest of the revs. 

From memory it was a bit like it before Steve mapped it then seemed a lot better but over the last few months I've been noticing it again (haven't driven it much over the winter). 

Dont know if anyone has come across it before. I got a video of the car on Darrens dyno and you can hear it pretty bad. I'll try and upload that later on.

Just after any ideas, pretty certain its injection related so could it be injectors or high pressure pump?
Reply
Thanks given by:
#2
I would hazard a guess at leaky injectors, i guess there's no blue smoke?
306 HDi Deathtrap - 130bhp / 220lbft
...UPGRADING...



Reply
Thanks given by:
#3
(31-03-2016, 05:44 AM)Poodle Wrote: I would hazard a guess at leaky injectors, i guess there's no blue smoke?


It does put out a little bit of blue/white smoke when going steady with a little bit of throttle.

Heres a video to give an idea of the sound

https://youtu.be/NVQNGqOoZRA
Reply
Thanks given by:
#4
That sounds like one injector that has a naff solenoid and/or worn internally and the pre/main injection quantity on that cylinder is way high...

If you can, get it plugged into pp2k and see the correction quantity and see if there's one cylinder worse than the others? It sounds particularly bad on one cylinder..
(16-05-2016, 10:45 AM)Toms306 Wrote: Oh I don't care about the stripped threads lol, that's easily solved by hammering the bolt in. Wink
Nanstone GTD5 GT17S - XUD9TE
Volvo V50 D5 R-Design SE Sport - Daily cruise wagon.
Reply
Thanks given by:
#5
Ok cheers Ruan ill try and look into and let you guys know
Reply
Thanks given by:
#6
I swapped the injectors over last night for some out another engine. Gave it a blast up the road and does seem to be a lot better
Reply
Thanks given by:
#7
I dont know if it is linked but i do still seem to get some white ish coloured smoke out the exhaust when rev'd up on the spot and on the run down at low speeds. Any ideas?
Reply
Thanks given by:
#8
white = timing or fueling issue

blue = f*cked rings or turbo seal

black = NEEDS MORE BOOST FOR POWEERRR!!!
Given the choice between Niall and the sheep. I would choose the sheep!
/Toseland
Reply
Thanks given by:
#9
I'm sticking to the leaking injectors theory.
306 HDi Deathtrap - 130bhp / 220lbft
...UPGRADING...



Reply
Thanks given by:
#10
Does it get worse if you leave the engine idling for a while?
(16-05-2016, 10:45 AM)Toms306 Wrote: Oh I don't care about the stripped threads lol, that's easily solved by hammering the bolt in. Wink
Nanstone GTD5 GT17S - XUD9TE
Volvo V50 D5 R-Design SE Sport - Daily cruise wagon.
Reply
Thanks given by:
#11
(10-04-2016, 09:27 PM)Ruan Wrote: Does it get worse if you leave the engine idling for a while?

I would say so yeah
Reply
Thanks given by:
#12
It's either naff injector, or have you checked the engine breather isn't blocked...? That's a classic cause of white smoke when you lift...
(16-05-2016, 10:45 AM)Toms306 Wrote: Oh I don't care about the stripped threads lol, that's easily solved by hammering the bolt in. Wink
Nanstone GTD5 GT17S - XUD9TE
Volvo V50 D5 R-Design SE Sport - Daily cruise wagon.
Reply
Thanks given by:
#13
Ok cheers Ruan, breather should be ok, i just got a pipe going out to the atmosphere. I haven't really driven it since i swapped the injectors over so could of been the injector causing the issue.
Reply
Thanks given by:
#14
(11-04-2016, 12:22 PM)Frosty Wrote: Ok cheers Ruan, breather should be ok, i just got a pipe going out to the atmosphere. I haven't really driven it  since i swapped the injectors over (mainly because I'm loving the roar of the VNT from the XUD) so could of been the injector causing the issue.
EFA
Reply
Thanks given by:
#15
(11-04-2016, 12:22 PM)Frosty Wrote: Ok cheers Ruan, breather should be ok, i just got a pipe going out to the atmosphere. I haven't really driven it  since i swapped the injectors over so could of been the injector causing the issue.

Sure yeah, just absolutely make sure that pipe isn't blocked and the check/one-way valve in the rocker cover isn't somehow blocked or jammed - as that would definitely cause this issue.
(16-05-2016, 10:45 AM)Toms306 Wrote: Oh I don't care about the stripped threads lol, that's easily solved by hammering the bolt in. Wink
Nanstone GTD5 GT17S - XUD9TE
Volvo V50 D5 R-Design SE Sport - Daily cruise wagon.
Reply
Thanks given by:
#16
(11-04-2016, 01:13 PM)mr_fish Wrote:
(11-04-2016, 12:22 PM)Frosty Wrote: Ok cheers Ruan, breather should be ok, i just got a pipe going out to the atmosphere. I haven't really driven it  since i swapped the injectors over (mainly because I'm loving the roar of the VNT from the XUD) so could of been the injector causing the issue.
EFA

Haha lmao

(11-04-2016, 02:02 PM)Ruan Wrote:
(11-04-2016, 12:22 PM)Frosty Wrote: Ok cheers Ruan, breather should be ok, i just got a pipe going out to the atmosphere. I haven't really driven it  since i swapped the injectors over so could of been the injector causing the issue.

Sure yeah, just absolutely make sure that pipe isn't blocked and the check/one-way valve in the rocker cover isn't somehow blocked or jammed - as that would definitely cause this issue.

Ok ill try and have a look at some point this week. Cheers for your help once again Ruan.
Reply
Thanks given by:
#17
one way valve in rocker cover? would this by chance be round and live in the circular part of the rocker cover next to the breather hose that goes to the inlet manifold??
Reply
Thanks given by:
#18
Correct.
(16-05-2016, 10:45 AM)Toms306 Wrote: Oh I don't care about the stripped threads lol, that's easily solved by hammering the bolt in. Wink
Nanstone GTD5 GT17S - XUD9TE
Volvo V50 D5 R-Design SE Sport - Daily cruise wagon.
Reply
Thanks given by:


Forum Jump:


Users browsing this thread: 1 Guest(s)