hi folks,

i've done quite a bit of research through the forum on this but would appreciate your input/backup if poss?

i have an 04 1.9JTD 115 which i bought a couple of months ago from a small dealer. having been back to them a few times without much success i decided to go to a main dealer to get the problem resolved but i seem to be spending money and not getting very far.

symptoms / history:

1) any gear from 3rd up booting it (a few miles after after starting) i'd get a large cloud of brown smoke and, occasionally (usually when wet weather) the yellow 'engine fault' light would appear with 3 beeps.

2) garage changed the 'turbo boost pressure sensor' - no change atall.

3) garage then blanked out the 'EGR valve' for elimination purposes - the smoke has been lessened greatly so assumed this was the problem.

4) driving home tonight, booted in 3rd and the 'engine fault' light was back with a vengeance along with it's chum the smoke . i gave it some more welly and power was up and down, at one point no acceleration atall but then it came back when i changed gear.

5) (wildcard! unsure if related...) very occasionally first thing the car will totally lose power, almost like it's mis-firing, the revs won't go up but after a few mins at the side of the road and after some smoke it seems to warm up and back to normal.

it's booked in to have this EGR valve replaced but (and im no mechanic), if it's been 'blanked off' wouldn't this indicate it's another independent issue?

there is no loud hissing as some seem to report (other than quite a healthy sounding low volume whistle at low speed which i presume is the turbo?).

reading through the forum, these threads seems the most likely candidates...

one titled "Egr Valve (or overboost valve?)" (2008)
and one titled "Engine fault/sensor fault JTD" (2006)

im not allowed to post URLs it as im a newb!!!

would you agree that i need to ask the garage to replace the overboost valve and that the EGR is very unlikely? im surprised the overboost valve hasn't been suggested by the garage?!

i see some people have ended up living with this type of problem but i'd like to get it resolved as im hoping to have the car quite a few years.

many thanks for a fine resource and of course a very merry xmas to you all.

cheers,

Luke :slayer:

First thing would be to get the error codes and that would give you a better idea whats wrong.
Overboost would be my first port of call as you say it happens more in the wet and sited where they are is fatal for them so if you do indeed get it changed bolt it too the side of the battery box.

Egr being blanked does indeed point to other issues one of which could be the overboost valve or even the Map sensor which would be worth pulling out and seeing if its gummed up.
Map sensor is on the inlet manifold in the middle too the left of the egr valve held on by a single 10mm nut.

many thanks Muppet1, hadn't considered the map sensor - will check.

cheers,

Luke

It could be the waste gate on the turbo, on my long lost 1.3 multijet panda (sadly drowned in a flood) the rod from the actuator to the arm for the "gate" itself had seized to each other, so it couldn't move and adjust according to the cars speed, its revs and what not.

Before I figured out it was the waste gate I hooked up one of the OBD code readers I got the overboost message, changed the maf and map sensor, but this changed nothing.

Had to remove the turbo and wire brush and sand the rod and arm. And more specific to the stilo, here is a guide to what Muppet1 has suggested ;-

https://www.fiatforum.com/stilo-guides/224083-stilo-jtd-boost-solenoid-valve-resite.html

hi Stilo Nutter, another avenue !! i think i'll try getting them to do the boost valve first and then onto the other possibilities... thanks for the link, i don't think i'll be attempting it though - no parking/tools where im currently living all a bit of a pain in the arse.

thanks for tips,

Luke

LuKeNuKuM said:

hi folks,

i've done quite a bit of research through the forum on this but would appreciate your input/backup if poss?

Click to expand...

Hi Luke,

As has been suggested, good idea to read some fault codes (see the sticky at top).

My first view is that the EGR valve has NOT been properly blanked. It's not that difficult to do (read the similar thread).

There's no "waste-gate" on a JTD as it uses a VGT so wouldn't recommend messing in that area. Turbo failure is actually quite rare with the cause often being due to something quite simple.

Overboost (VGT valve) issues don't normally cause a lot of smoke so I'd make sure the EGR valve really is blanked off :chin:

Worth reading up on the MAP and MAF sensor issues ahead of putting the car in. You may find similar symptoms as yours.

https://www.fiatforum.com/stilo/246501-jtd115-suspect-turbo-any-ideas.html

worth reading but a lot of replies

Argonought said:

Hi Luke,

As has been suggested, good idea to read some fault codes (see the sticky at top).

My first view is that the EGR valve has NOT been properly blanked. It's not that difficult to do (read the similar thread).

There's no "waste-gate" on a JTD as it uses a VGT so wouldn't recommend messing in that area. Turbo failure is actually quite rare with the cause often being due to something quite simple.

Overboost (VGT valve) issues don't normally cause a lot of smoke so I'd make sure the EGR valve really is blanked off :chin:

Click to expand...

hi Argonought,

interesting, i shall try to have a look at the EGR valve and pass that on... getting the fault codes off is an option but I'd need to get the machine first, i wish the garage could be doing all this!

cheers,

Luke

rattystilo said:

Worth reading up on the MAP and MAF sensor issues ahead of putting the car in. You may find similar symptoms as yours.

https://www.fiatforum.com/stilo/246501-jtd115-suspect-turbo-any-ideas.html

worth reading but a lot of replies

Click to expand...

thanks Ratty... shall do some more trawling, i think the danger is im at risk of confusing myself.



Luke