Thread: Smokey TD5

IMO check the glow plugs first of all

Unburnt fuel will be whiteish not black.

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I would keep a very close eye on the oil level.try and check on a level spot in the same place daily.You may have a leaking injector seal or crack in the heads fuel channel.
An increasing oil level is bad and requires immediate attention.
Failure to do so may result in an engine run away which will result in a total engine failure.
Andrew

Hmmm, mine did that when the head and head gasket went.

Originally Posted by sierrafery

IMO check the glow plugs first of all

What am I checking the glow plus for, to see if one is wet from fuel?

Originally Posted by d2dave

What am I checking the glow plus for, to see if one is wet from fuel?

I meant if they work, unplug them in situ and measure resistance with multimeter across the glow plug's terminal and engine body, you should get 0.9 Ohm on a good one, then leave one unplugged, ask somebody to turn ignition to 2 while you measure voltage across the connector and ground to see if they get feed, if one is getting voltage usually they all do and it means the relay is OK, the fact that the warning lamp comes on doesnt mean they work cos it's managed directly by the ECU it will come on even if you remove the relay and all the plugs

Why would faulty glow plugs cause black smoke at idle?

Cos they are not only for start up, they have a post heat operation too and black smoke is a symptom of non-working glow plugs after cold start(untill the coolant temp exceeds 40*C):

Originally Posted by ENGINE MANAGEMENT SYSTEM - TD5; DESCRIPTION AND OPERATION 18-1-31

....
The glow plugs are a vital part of the engine starting strategy.
The purpose of the glow plugs is:
-Assist cold engine start.
-Reduce exhaust emissions at low engine load/speed.
.....
Post-heat is the length of time the glow plugs operate after the engine starts. The ECM controls the post-heat time
based on ECT information. If the ECT fails the ECM will operate pre/post-heat time strategies with default values from its memory.
.....
In the event of a glow plug failure any of the following symptoms may be observed:
-Difficult starting.
-Excessive smoke emissions after engine start.

IMO better check them cos it's not hard and it's good to rule them out