Car losing power

As my car wasn’t getting the power it should be getting I got a mechanic to put a new egr valve and air flow sensor in, but I’m still getting some sort loss of power even after the new parts were put in. When I drive the car it sometimes lunges and looses power. Any idea what could be the problem?

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GerOttman · 61-69, M

is the check engine light coming on? Do you have a reader to scan the engine codes? Is it a turbo?

Ian1892 · 41-45, M

@GerOttman my local mechanic did do a diagnostic test yesterday and I’m pretty sure something came up regarding the turbo.

GerOttman · 61-69, M

@Ian1892 I thought this sounded turbo'ish... I had to replace the valve cover assembly on mine, there was a built in check valve which failed. Does it run well at speed and have trouble at idle, low speed and acceleration? all signs of an air leak, any number of possible sources for it. need to eliminate them one by one. pop the hood and listen for a telltale hiss.