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trev16185

Black Smoke

9 posts in this topic

Hi I'm looking for opinions and Info here..

I have a 2005 tdci mondeo 2.0 130bhp euro 4...

I have noticed that when pulling away this is a sign of what looks like black smoke from exhaust.. Also I noticed that if car is left at idle for approx ten mins or so when you then pull away the black smoke is more of a cloud.. The smoke seems to clear once you get up the rpm's

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check the intercooler pipe for splits(its the large pipe on the bottom of the egr valve) also when was the egr valve itself last removed and cleaned ?

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Uh oh MOT fail coming up.

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Hi guys thanks for replys.. Intercooler hoses seem fine I checked them visually an also while holding a rev on the car the pipes all become firm with no signs of leaks..

But I seem to keep get the fault codes

P0401 and p0405 poppin up.. When clear car will drive a few miles without light then after sits turned of for approx ten mins and started again light appears..(engine light)..

I have since tried a new egr valve to no affect.. Any ideas what this is.. The black smoke seems to have calmed itself..

My train of thought is more why is these 2 codes re appearing...

P0405 says... Exhaust gas recirculation sensors A circuit low

P0401 says..exhaust gas recirculation flow insufficient detected...

Driving me mad... :-(

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Yes replaced egr but no difference..I wouldn't know what values to be looking for at the egr 3 pin plug.. Would it be possible the maf sensor is faulty

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Ok just tested sensor in both old n new egr valves both read 1.5 volts closed and 4.5 volts open..

Is there something I'm missing that's causing this fault... Really drivin me mad

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hi iv just put an egr blank plate in and stopped all smoke ,, now getting better acceleration and better fuel economy

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If u blank egr does this not leave engine check light on all the time on euro 4.?.

I had my vacum regulator go faulty which gives same effect as blanking egr and light stayed on

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