Member Since: 29 Jul 2020
Location: Kirchstetten
Posts: 96
Random misfire on a 2,7
Hi
I just reworked my engine with 6 new glow plugs and 3 injectors.
And all the standard things like belts and so on.
It was running fine for one week.
And now it starts misfiring one cylinder...... Occasionally
Not regular..... I would say always between 10 to 20 sek in between.
Fault codes says:injector offset 2 and 3 low
And 5 high.
The running values on obd2 are:
Inj1 738
Inj2 601
Inj3 611
Inj4 797
Inj5 1398
Inj6 908
BUT: I did a leakage measurement and there are all cylinders almost equal.
Any idea what it could be?
I do not have the possibility of a compression test.
Best regards
Roland
27th Nov 2020 6:40 pm
Fuxl
Member Since: 29 Jul 2020
Location: Kirchstetten
Posts: 96
That's a picture of the leakage test
27th Nov 2020 6:52 pm
jenseneverest
Member Since: 12 Jun 2017
Location: somewhere
Posts: 760
Which injectors did you change ?
27th Nov 2020 6:53 pm
Fuxl
Member Since: 29 Jul 2020
Location: Kirchstetten
Posts: 96
New:
Cyl4 /inj2
Cyl5 /inj4
Cyl6/inj6
Tomorrow I will exchange
Inj 2 and inj5
To see if it is the injector.
Best regards
Roland
27th Nov 2020 7:52 pm
jenseneverest
Member Since: 12 Jun 2017
Location: somewhere
Posts: 760
number 2+3 are trying to offset the dodgy one
number 5 injector is way out and bet that is your issue,
exchanging them to see is a good idea to make sure.
but they are very low as well.... was it new injectors you used ?
27th Nov 2020 8:08 pm
Fuxl
Member Since: 29 Jul 2020
Location: Kirchstetten
Posts: 96
Hi
This morning I exchanged the injector5 from cylinder 3 with the injejtor from cylinder 5.
After that there was a new fault code:
P020E Cylinder 5 injection timing
with this error there are no balance values in the system readable
To go sure I exchanged now the cylinder 5 injector with the cylinder 4 injector.
The fault code moved with it to cylinder 4 injector timing.
Seems to be the injector.
crazy that it happend so fast after the change of the other injectors.
best regards
roland
28th Nov 2020 11:05 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4626
Try replacing that injector the best of the old injectors you removed earlier! It may come back within tolerance (balance) now that there are three new ones in there.
Might also save you a few pennies at least until the other side of Xmas. yµ (idµ - eAµ) ψ=mψ
28th Nov 2020 11:18 am
Fuxl
Member Since: 29 Jul 2020
Location: Kirchstetten
Posts: 96
Hello
One Year later! and still, ...or again, ..... some problems.
I already excanged all 6 injectors.
Injector balance looks good.
but its running very rough when i do a coldstart below 10°C.
here a short video. you can hear it.
injector balance at this moment:
Click image to enlarge
in real life it sounds like it is running on 3or 4 cylinder.
As soon as it gets warm its idling fine
I have no idea what the reason for this could be. !?!?!?
Any Ideas?
Any suggestion what i could check?
Best regards
Roland
4th Nov 2021 4:53 pm
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
Oil temp sensor, screws into left sde of the sump, no need to drain oil to change so long as you swap quickly.
Iirc the oil temp sensor and the oil pressure sensor are somehow tied in together.
Mine was all over the place when weather was cold until engine was up to operating temp.
4th Nov 2021 6:25 pm
Discomadness
Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256
Well this is exactly the problem I’ve had with mine ! I changed the oil temp sensor. Where is the oil pressure sensor located ? I’m determined to get to the bottom of it. To the point I’ve even got another engine wiring harness to replace mine as a just in case.Jarrod
Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE.
4th Nov 2021 7:48 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
I think he meant the coolant temp sensor, which is grey in a pipe at the front. Though, if not sure changing it will resolve it
4th Nov 2021 7:50 pm
Discomadness
Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256
Hi Pete. It’s such a bloody frustrating fault. As soon as the temp needle moves it idles and runs fine.Jarrod
Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE.
4th Nov 2021 7:54 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
maybe worth changing the sensor then.
get the correct one for your year car.
4th Nov 2021 8:02 pm
Discomadness
Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256
Ok I get you. Where is it located ?Jarrod
Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE.
4th Nov 2021 9:39 pm
Breg90
Member Since: 04 Feb 2017
Location: Falkirk
Posts: 347
Pete K wrote:
I think he meant the coolant temp sensor, which is grey in a pipe at the front. Though, if not sure changing it will resolve it
The oil temp sensor if it goes bad will read very low, like -33C. This can cause the engine revs to fluctuate. I had it on mine. Check the sensor output when the engine is cold and see what happens as you warm up engine.Series one 1949 - in bits, chassis is strapped to the ceiling in my garage (beside the canoe)
LR 90 - In bits
Disco 3 - currently in bits
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