Bedford MOT Smoke

[graemesanne]

;D Have a Bedford YLQ Needs MOT all ok except smoke currently producing betwen 3.18 and 3.65 Ministry require 2.5 new air filter tank full of diesel conditioner throttle stop right down only giving half throttle tried adjusting fuel pressure screw on pump: in gives high tickover unadjustable : out need to adjust throttle stop but still smoke : pump adjusted to max advance still smokes after idle for test but quite clean on normal warm running : any advise please as HGV test booked
Cheers Graeme

Latest news just past smoke test with 1.96 screwed down to 1/3 throttle drove a stately 30mph all way to test station job done reset throttle stop after test all back to normal!!!!!

[Jonathan Smith]

The engine should be at normal running temp when the test is carried out, take it for a long run to clean out the engine. Don't leave it running at idle as it lines the exhaust with soot.