Battery’s good but the alternator is only putting out 11-13v so if I get a chance tomorrow I’m going to change it. When I tried it today from stone cold there was a small amount of white smoke/roughness but still a lot better than it has been
Battery’s good but the alternator is only putting out 11-13v so if I get a chance tomorrow I’m going to change it. When I tried it today from stone cold there was a small amount of white smoke/roughness but still a lot better than it has been
johnlad
Well-Known Member
Not what I asked, read my first reply again
johnlad
Well-Known Member
Ok
Using a code reader with the car idling after starting check injector balances, not bothered too much by the figures but if any are way different from each other.
They were all with 10 of each other. However as a last resort i changed all the injectors this morning. New genuine copper washers (annealed too), new genuine o rings. The injectors were untested when I bought them a few years ago and have sat on the shelf ever since.
Started it and plumes of smoke of all colours, cleared it let it settle for 20 mins and started again and there was just the tiniest puff of what looked like light blue smoke when lifting off the accelerator after the second rev, nothing after that just a bit of black smoke as normal, and no roughness whatsoever
So hopefully tomorrow when I try it it’ll still be good!
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neilly
Well-Known Member
sierrafery
Well-Known Member
You really need a compression test if the fault persists
To be honest I wasn’t really looking at that at the time so I don’t know exactly but it wasn’t anything abnormal or out of the ordinary
I’ll be doing it anyway I think! It’s fairly painless via the glow plugs
sierrafery
Well-Known Member
That reading is very good but it has not much to do with your symptom anyway
I was thinking it had to be in the 50’s but yes it has nothing to do with the current problem and glad it’s a good reading. Looking forward to seeing how it starts tomorrow after being left overnight.
When I do the compression test I am going to do it via glowplug ports, mainly because I don’t want to disturb the injectors again. What kind of readings should I expect? I have read differing opinions ranging from 300-400psi
johnlad
Well-Known Member
Compression test through glow plugs is only on 4 cylinders, you need an electronic compression test using an engine analyser reading cranking compression of all 5 cylinders
Yeah I know but we’re not that advanced! 4 out of 5 is better than nothing! I could do it via the injector sockets but having seen them 4 times in a short amount of time recently I’m reluctant to pull them all just for a little puff of what “appears” blue smoke on startup. When it’s bellowing plumes of blue smoke I’ll happily do it properly ! 4 out of 5 will give some idea I’d have thought
johnlad
Well-Known Member
Went to it this morning, exactly the same
What else apart from the injector washers would cause this?
Drawing air in from somewhere, or leaky injector, head gasket or head or knackered engine.
What year is it and how many miles on it.
Year 2000, 87k miles.
Injectors have been changed. If it was head gasket I'd expect some coolant loss. If it was a knackered engine would it not sound knackered? It's never missed a beat.
sierrafery
Well-Known Member
IMO 4 out of 5 compressions would give you an ideea if something is wrong, you should get at least 23 Bar on each on a good engine, between 25-28 is the best
I will do a compression test but it does seem more "airy" and I have never noticed that hissing noise from the head before. Surely if a cylinder was low on compression it would run like a bag of bolts all the time?
