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Something went on my Cougar this weekend. It stalls-out and will not idle. It drives, but runs rough and has lost power. The check engine light has come on too. Haven't checked the codes. Any ideas what's wrong?
 

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idle air control valve? Mine had similar symptoms once but it was b/c my air filter fell off...or rather, fell apart. (cheap filter on SCA intake, it fell apart and left the base clamped to the pipe. car did not like an open intake)
 

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Originally posted by: 01blkcat
Could be IACV, or the DPFE, check that your throttle plate is clean, vacuum leaks....

Meaning: get those codes scanned :biggrin:
DPFE would only cause a CEL, not stalling. Sounds like the IACV or the Fuel Pump since it runs rough after it doesn't stall ... IACV would ONLY effect idle (throttle plate closed). I would check fuel pressure at the rail during idle and go from there.
 
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