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macabethiel · 14-05-2018, 17:52

I understand that the Diesel Smoke test is still done when the engine is at normal running temperature on a ramp so no fears with cold engine smoke or on the over-run at speed.

On older vehicles like my Jeep there is no DPF, my understanding is that if at constant revs there is visible smoke it is a fail.

I have yet to see any Diesel car that does not show some visible smoke for a short period during acceleration!

Lastly just about every City Bus & HGV in Derby is going to fail if the test is going to be as severe as it sounds.

I just hope there is some common sense come testing time our is not due until next February so that gives the tester time to get over the learning dip / curve!

Do we have an MoT tester amongst our Mebers that has had the new training course to give us some wise words?

14-05-2018, 17:52	#5
macabethiel Senior Member Join Date: Aug 2008 Location: Derby Vehicle: Freelander & Jeep GC 3.0 Posts: 4,415	New visible smoke test rules ? I understand that the Diesel Smoke test is still done when the engine is at normal running temperature on a ramp so no fears with cold engine smoke or on the over-run at speed. On older vehicles like my Jeep there is no DPF, my understanding is that if at constant revs there is visible smoke it is a fail. I have yet to see any Diesel car that does not show some visible smoke for a short period during acceleration! Lastly just about every City Bus & HGV in Derby is going to fail if the test is going to be as severe as it sounds. I just hope there is some common sense come testing time our is not due until next February so that gives the tester time to get over the learning dip / curve! Do we have an MoT tester amongst our Mebers that has had the new training course to give us some wise words?