Yes but for what purpose
The ECM needs them to adjust the air/ fuel settings
SOURCE: Lack of power, exhaust smoke and engine miss
Just an idea but the Ford Mondeo ( european car ) from which I believe your engine
is
taken has a habit of splitting a low pressure tube at the back
of
the engine this is a relatively
cheap,
easy fix. The other symptom this used to throw up was a
little more
black smoke from the exhaust and a pacing/ surging from
the engine.
SOURCE: vitara how to blank off egr valve
Just remove the valve from the engine, two bolts on most and use a piece of brass shim stock (available from auto parts stores like NAPA) and cut a block off gasket to go under the valve. Use the old gasket as a template but of course don't cut the hole that exhaust gas goes through in the shim stock. The shim stock comes in various thicknesses so ask the parts counter person which would work best, around .006" should be fine as far as thickness goes. You can also use a soda can for the metal, but it may not last very long.
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