Smoky td5

[karloss]

Low miles, well maintained td5 Blowing grey smoke out like a train. Slight "misfire" at 2000 ish revs. Any ideas? Anyone?

[Range Rover Blues]

Other than "it's bust" you mean :-k

Grey smoke, isn't that timing related? otherwise I'd be looking at the cooling system for using water.

Possibly a lousy injector too.

[Hightower]

Misfires can sometimes be caused by oil in the injector wiring loom.  But that may just be for Disco's, not sure . . . .  :?

[burgerman]

Misfires can sometimes be caused by oil in the injector wiring loom.  But that may just be for Disco's, not sure . . . .  :?

 No definately in defenders too, trust me i know  :roll:

[karloss]

Sorry, should have been more specific. It's grey as opposed to white. Unburnt fuel I'm presuming. Was hoping it was something common and 30 people would say...."it's your....xyz, it always is".
The oil and water levels are perfect, not using a drop of either, no mixing of the two either. Water does smell a bit "burnt" so maybe head gasket related??
I'll check the wiring tomorrow and see what's what but I'm doubting it to be honest. Is this the bit of loom on top of the rocker box under the cover?
Bloomin land rovers, remind me again why I love them so........

[Landy Andy]

Done filters????????????

Andy

[karloss]

Yep. Filters are all pretty new.

[karloss]

OK, took the top off the rocker box and removed the injector loom, was pretty clean, considering where it lives. Cleaned the whole thing with switch contact cleaner, cleaned the top of the injectors in same manner, fired it all back together.
Just the same. Any more ideas?
Has anyone ever found the need to adjust the injector push rods (except when re-building obviously)?
 :-k  :-k  :-k

[Hightower]

OK, took the top off the rocker box and removed the injector loom, was pretty clean, considering where it lives. Cleaned the whole thing with switch contact cleaner, cleaned the top of the injectors in same manner, fired it all back together.

Did you check the loom at the ECU end?

[karloss]

I didn't to be honest. Not sure where the other end terminates. :oops: Is it in one of the big multi plugs on the bulkhead?

[Range Rover Blues]

A grey, acrid smoke is poor timing, our 300TDi does it when the fuel filter is blocked too as that messes up timing and fuel charge.

Injector pushrods, not an expert on these engines but if they are wrong they could effect timing :-k

Also, when were any belts changed?

[DogVanMan]

Karloss.. late reply so you may have found out already but you need to check the ecu end of the loom. Go under the drivers seat and find the ecu (Aluminium flat square box, roughly 6" square). Looking down, locate the red multiplug on the right, pull it off and check inside for oil. The cream coloured rubbery plastic insert comes out. Any signs of oil here is from poor injector loom sealing and may cause misfiring.

Remedy by replacing injector loom and cleaning ecu end with brake cleaner or similar.. and then again a couple of times over the next few weeks as it works it's way through the loom by capiliary action.

I hope that helps!

G