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Ford duratech 2.6 liter runs randomly rough and growls through air intake?
Wiki User
∙ 14y ago
If you mean the 2.5 Liter Duratec, then your problem sounds like IACV mooseing. The Idle Air Control Valve (IACV) allows the engine to breathe even when the throttle body is fully closed, so that the engine doesn't stall while you aren't applying the gas. However, due to the way that Ford implemented crankcase gas return on the Duratec, debris and oil from partially combusted gasoline flows from the Exhaust Gas Return lines to the intake hose for the IACV and into the IACV. Over time these deposits can build up, disrupting movement of the valve, causing a moose like sound and a rough idle.
This is a very common problem with all Duratec engines, the vast majority of which will experience this issue. The cure is simple. Remove the IACV, disassemble it, and clean it thoroughly. Exact instructions on how to clean can be found in any car forum where Duratecs can be found, such as newcougar.org, or contour.org.
Wiki User
∙ 14y ago
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