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ajtel

td18a

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possible causes of back 3 cylinders excess  white smoke?

front 3 cyl ok.

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Probably a slobbering injector on rear head. Could also be a leaky valve, dropping compression in that cylinder. Hard to determine which cylinder is culprit as the back 3 cylinders are combined into same manifold. 

You could warm up engine, then crack bleeders one at a time and check exhaust. The bleeder will drop pressure below the injector nozzle crack pressure and stop fuel from entering that cylinder. Also use a infrared temp gun to check the exhaust runners for a cold cylinder 

Compression check the cylinders to see if a valve may be leaking. This would cause the fuel to remain unburned in the low cylinder.

keep us posted on what you find. Merry Christmas, Jim.

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