Member Since: 24 Nov 2011
Location: Cheshire
Posts: 81
Grey Smoke on idle - injector woes
I’ve not long had my D3 and it’s proving to be a little troublesome but no matter, we press on.
It’s a 2008 EU4 car so when I got it as a already had one of Pete Bells dongles for my RR, I opted to have a remap for the D3, removing the EGR’s. I blanked the lower part of them and removed the butterfly.
Since then, the car has been a little troublesome but after searching through this forum, its seems to be the injectors at fault. I’ve logged the output of the injectors as per the pics below and was hoping somebody knowledgeable would be able to pinpoint the issue.
Is it simply some of them are duff and need replacing? The ones with the flatter curves that don’t really match the revs?
Advice and help always appreciated.
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D3 G4 Selections car ‘08
L322 G4 2003 Event car ‘03
110 G4 Event car ‘03 and ‘06
Series 2a ‘68
13th Apr 2021 5:42 pm
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
I would start by removing the remap, if it was no trouble before and the smoke started afterwards.
13th Apr 2021 5:53 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72775
Bit more readable.
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13th Apr 2021 5:57 pm
bigjc
Member Since: 24 Nov 2011
Location: Cheshire
Posts: 81
I have thought of that, a used throttle body is en route as the actuator housing had a crack in it so it was easier just to get a new unit before unblanking EGR and removing remap. Still not sure why the map would send the injectors out though.
Should add the MAP not MAF has been changed for a new one.D3 G4 Selections car ‘08
L322 G4 2003 Event car ‘03
110 G4 Event car ‘03 and ‘06
Series 2a ‘68
13th Apr 2021 5:58 pm
bigjc
Member Since: 24 Nov 2011
Location: Cheshire
Posts: 81
I put the car back to standard today, unblanked the EGR and again there was plenty of smoke so I thought that’s not the issue. The injector logs were still all over the place so out the injectors came to be tested/refurbished/replaced.
Watch this space...
D3 G4 Selections car ‘08
L322 G4 2003 Event car ‘03
110 G4 Event car ‘03 and ‘06
Series 2a ‘68
15th Apr 2021 8:08 pm
G3Z
Member Since: 16 Dec 2018
Location: South Wales
Posts: 537
I’d probably put it all back together and put some injector cleaner in the fuel and give it a good run. Start with the simple stuff first.Defender 110 2.4 TDCi Utility Station Wagon.
2007 Disco 3 GS TDV6 Manual
200,000+ mile club 😎
15th Apr 2021 10:04 pm
bigjc
Member Since: 24 Nov 2011
Location: Cheshire
Posts: 81
Injectors were tested by Dieselcraft close to me and 5 were passed as ok but one was leaking so has been fixed and recalibrated. I'll commence reassembly tomorrow and see how its changed things.D3 G4 Selections car ‘08
L322 G4 2003 Event car ‘03
110 G4 Event car ‘03 and ‘06
Series 2a ‘68
19th Apr 2021 7:53 pm
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
Be a good fix if it cures it
Did you enjoy access to the passenger side rear injector!
19th Apr 2021 8:16 pm
bigjc
Member Since: 24 Nov 2011
Location: Cheshire
Posts: 81
That injector by the battery had many many new one syllable names during its extraction.
Hoping reassembly goes a little better.D3 G4 Selections car ‘08
L322 G4 2003 Event car ‘03
110 G4 Event car ‘03 and ‘06
Series 2a ‘68
19th Apr 2021 9:29 pm
bigjc
Member Since: 24 Nov 2011
Location: Cheshire
Posts: 81
Refitted the injectors today and fired up the car and....... just the same - lots of smoke. The injector balancing values are now much better though, closer together with no outlying figures which is positive.
So, I’m guessing it’s something else. Head gasket? Coolant clean with no oil present, oil filler cap and dipstick free of milky gunge so no obvious signs.
Turbo? No error codes to point towards it but the car is definitely holding back and doesn’t appear to be spooling up.D3 G4 Selections car ‘08
L322 G4 2003 Event car ‘03
110 G4 Event car ‘03 and ‘06
Series 2a ‘68
20th Apr 2021 6:24 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4627
What diagnostics are you using, and what codes are logged if any?yµ (idµ - eAµ) ψ=mψ
20th Apr 2021 9:44 pm
bigjc
Member Since: 24 Nov 2011
Location: Cheshire
Posts: 81
@profsr g - no codes at the moment. I have a BAS fault code reader and a hawk thingy NT510.D3 G4 Selections car ‘08
L322 G4 2003 Event car ‘03
110 G4 Event car ‘03 and ‘06
Series 2a ‘68
20th Apr 2021 10:14 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4627
I'm surprised by that given there's an obvious combustion issue. Have a look at the injector trim levels again but the values must be taken at idle speed only!
Beyond that and in the absence of any dtc's, a 5.5 mm borescope into each cylinder might reveal something, but I'd suggest alternative diagnostics first before you go pulling the injectors again.yµ (idµ - eAµ) ψ=mψ
20th Apr 2021 10:41 pm
bigjc
Member Since: 24 Nov 2011
Location: Cheshire
Posts: 81
These are the latest values at idle with a small rev of the engine. Much more even at idle.
Click image to enlarge
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D3 G4 Selections car ‘08
L322 G4 2003 Event car ‘03
110 G4 Event car ‘03 and ‘06
Series 2a ‘68
20th Apr 2021 10:53 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4627
In my view they're all acceptable at 776 rpm, something else is going on!
Values above idle mean nothing without specialist test equipment, but I'd be happy enough with those readings to rule out injectors for now.
EDIT: Assuming 776rpm is at idle!!yµ (idµ - eAµ) ψ=mψ
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