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TD Injector pump on an N/A engine.


Les Henson
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I've been working on a 2.5 N/A engine (head gasket). Engine runs better, but still smokes. I just noticed that it has a TD inj pump fitted, and the the turbo boost part of it has got a plug in it, and the other pipe goes to the spill rail as normal. I don't suppose anyone has any idea if the TD pump would cause any problems on the N/A?

Getting awfully p****d off with stinking old L/R engines I can tell you.

Les.

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I would say its the wrong pump. I know the injectors for the n/a and turbo are the same and the turbo will need more fuel injected for the denser air going in so it must be the injection pump that is calibrated for greater delivery and hense perhaps the smoking?

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I've been working on a 2.5 N/A engine (head gasket). Engine runs better, but still smokes. I just noticed that it has a TD inj pump fitted, and the the turbo boost part of it has got a plug in it, and the other pipe goes to the spill rail as normal. I don't suppose anyone has any idea if the TD pump would cause any problems on the N/A?

Getting awfully p****d off with stinking old L/R engines I can tell you.

Les.

This could be of some concern.

The newer injection pump delivers fuel at a much higher pressure (up to 600bar for some 300tdi injection pumps.) than the earlier injection pumps (up to 150bar).

The higher pressure could result in damage to the injectors. If a fault occurs in an injector, thereby creating an uneven spray pattern, this could damage the piston.

The uneven spray pattern, and following uncompleted combustion, would show as increased black smoke.

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