Question about 2002 Saab 9-5

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Failed mot on emissions slightly too high have changed the sparke plugs and air filter and added red x to the fuel now seems worse exhaust now smoking when at idle clears when driving is this the red x if so how long does it take to clear?

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It will smoke because of the red x, dontr know how long it will take to clear. But before going for an mot, you should take the car on the motorway or such like and give it a good blast/clean out. Town and short trip driving is not good for the car, it can clogg up the exhaust, and also if you take the car for test and the engine is relatively cold then the emmissions will be bad, As i said, give a good blast down the road to clear it out, That should work.

Posted on Feb 04, 2010

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