Member Since: 09 Aug 2017
Location: Coventry
Posts: 25
White smoke - help
Hi,
I need some help again.
Storey so far.
I bought a HSE auto disco with a seized engine (spun shells) to replace my current manual GS one. Rebuilt the engine as I did with my current working disco but I have an issue that I cant work out.
First issue was the immobilzer which was sorted by new key and program at the dealer (very painful on the wallet)
Loads of white smoke and misfire. When I say load of white smoke i really mean a load. Its unburnt diesel.
It idles and revs but very lumpy, very smokey
All injectors tending to minimum offset 600 except 6 sat at max 1400
Compression check 10,10,10,11,10,9 Bar => Compression ok
Cam timing checked with tool in correct flywheel hole and cams, checked again and then checked to the position of cylinder 1 to the flywheel hole (30 degrees off which is correct) =>mechanical timing ok
Fuel pressure - ok
All injectors swapped around and offsets stay with the cylinders. - no change =>injectors ok
3 second hand injectors bought and swapped left back, then right back - no change. => injectors ok
Fuel drained and replace with new - no change => not bad fuel
Each injector plug pulled off - engine started checked for smoke and lumpyness - engine stopped and put back on - removing any injector plug makes it run worse and doesnt change smoke. => harness ok
My current thoughts.
1. Maybe I put the trigger ring on in the wrong position (I used the tool but maybe it was late and i made a mistake)
Does this have an impact on injector timing? I would have thought this would be driven from the cam sensor and that the ECU would flag an error if the cam and crank timing signals were different? I really dont want to have to take out the engine.
2. Do the ECU's fail like this? (im thinking unlikely as it all seems to be working just not very well and i thought ECU's would work or not)
3. Why is it no 6 that always has the high offset reading.
Any help would be appreciated, im hoping I dont have to take it out again, im doing it with out a ramp which is a long job.
Could it be HPFP timing ??? I assume its a 3 litre, not a 2.7In Spain - 2018 F Pace - Down and out's Velar
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10th Feb 2018 10:40 am
heresy0uk
Member Since: 09 Aug 2017
Location: Coventry
Posts: 25
I think you will find it is timed on the 3.0
You should find 2 marks in the HPFP belt, and line up with a mark on the HPFP and cam pulleysIn Spain - 2018 F Pace - Down and out's Velar
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Last edited by Syd on 10th Feb 2018 10:52 am. Edited 2 times in total
10th Feb 2018 10:47 am
heresy0uk
Member Since: 09 Aug 2017
Location: Coventry
Posts: 25
I do not think the 2.7 is timed.In Spain - 2018 F Pace - Down and out's Velar
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10th Feb 2018 10:53 am
heresy0uk
Member Since: 09 Aug 2017
Location: Coventry
Posts: 25
Just check workshop manual again and no fuel pump timing is involved, all done with electrickery
Silly thought, is there any chance that your exhaust system is full of unburnt diesel.In Spain - 2018 F Pace - Down and out's Velar
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10th Feb 2018 11:01 am
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10363
well you have done all the obvious.
I wish I knew how the offset is determined.
My 2 thoughts
1) does the ecu need resetting to relearn the values
2) its suspicious that that cylinder is down on compression. Is that not the reason why it requires more fuel to make the engine run smooth? or maybe a leak past the valves
heresy0uk
Did you resolve this In Spain - 2018 F Pace - Down and out's Velar
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12th Feb 2018 2:21 pm
heresy0uk
Member Since: 09 Aug 2017
Location: Coventry
Posts: 25
No not yet.
Ive kind of ruled out me fitting the trigger wheel incorrectly as ive looked again at the tool and it cant be used incorrectly.
Ive just ordered a mini usb voltage logger to see what the ecu and harness is actually sending to the injectors.
Ive got a ecu, keys and bcm, same part numbers of another vehicle to see if that is the issue but it wont switch off the imobiliser, May be i need the clocks as well?
Ive got no other ideas!
12th Feb 2018 6:30 pm
heresy0uk
Member Since: 09 Aug 2017
Location: Coventry
Posts: 25
Pete K wrote:
well you have done all the obvious.
I wish I knew how the offset is determined.
My 2 thoughts
1) does the ecu need resetting to relearn the values
2) its suspicious that that cylinder is down on compression. Is that not the reason why it requires more fuel to make the engine run smooth? or maybe a leak past the valves
1) The ecu re learns once coolant reaches 60 degrees but these values are for idle only. They reset to 1000 when on throttle and that when most smoke is being made
2) yeah i thought that but i dont think its low enough to make a difference, the excess fuel will also be washing the cylinders and values so would reduce compression.
12th Feb 2018 6:49 pm
heresy0uk
Member Since: 09 Aug 2017
Location: Coventry
Posts: 25
right so, ive tried another ECU and it was the same so ive decided to bite the bullet and pull it all out and strip it down slowly looking for my mistake!
16th Feb 2018 9:24 pm
heresy0uk
Member Since: 09 Aug 2017
Location: Coventry
Posts: 25
Took the left head off and im amazed!
Piston 1
0.65mm over flush
Piston 2
0.5mm under flush!!
Piston 3
2.5mm under flush!!!!
Not really sure I can do about this.
19th Feb 2018 9:27 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10363
interesting.
I think you change the piston/con rod (if you have spares) so it matches the others
and then you are meant to use the correct thickness head gasket so it doesn't hit the head.
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