wurzel7840 · Sep 17, 2010

my 04 td5 disco when cold going down a slight slope not accelerating sometimes starts to miss and smoke for a few secs then clears?????? it can do it a few times.
thinking its not the head as water still pink with anti-freeze and oil is same level and good.
any good ideas where to start???

spencer1885 · Sep 17, 2010

I would think its more likely to be a bad injector.
Bad injectors are at their worst when injecting at idle or low throttle and when the engines cold.
White smoke is the diesel not burning and causing the misfire.

wurzel7840 · Sep 17, 2010

any idea how the best way to test the injectors is?

B3aker · Sep 17, 2010

check the EGR, I had this problem till I removed it. Much cheaper to sort than an injector too.

ratty · Sep 17, 2010

B3aker said:
check the EGR, I had this problem till I removed it. Much cheaper to sort than an injector too.

EGR will give similar symptoms but will usually emit black smoke.

It could be as simple as an injector washer or even just condensation.

wurzel7840 · Sep 18, 2010

its been de-egr'd so looking like injectors, will a dealer be able to plug it in to find out?

ratty · Sep 18, 2010

wurzel7840 said:
its been de-egr'd so looking like injectors, will a dealer be able to plug it in to find out?

yes a dealer can plug it in. It may not show the fault though.

wurzel7840 · Sep 22, 2010

touch wood i think i sorted it by getting a new injector harness and cleaning the red plug on the ecu.. :banana:

Snowey · Sep 22, 2010

wurzel7840 said:
touch wood i think i sorted it by getting a new injector harness and cleaning the red plug on the ecu..

That is the first place I would have looked - it was on the tip of my tounge as I scrolled down to the end of this thread.

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