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I’d check for any codes it might have first, even if CEL isn’t on, as it may not be a permanent code yet. Dieing once it’s warmed up tends to indicate either some kind of issue with the bank1 O2 sensor, or idle air control issue from a seal or other vacuum leak. Does it go from running fine for the first few minutes, then start running rough/surging, or just go from fine to stalling directly?
The Focus turns over, then dies right away unless I give it gas. As soon as I get it in gear and run for a few minutes its ok. Will check codes as you suggest. Thanks, Scott
Try cleaning the mass airflow or Iat inlet air temp sensor.
which ever one you have.http://www.ericthecarguy.com/faq/solving-automotive-performance-issues
Sounds like a vacuum leak to me. Look around for some vacuum hose that got knocked or has fallen off. When I had this same problem I went through all sorts of testing and replaced a few parts until one day I noticed the big hose from the pcv valve to the intake had fallen off it’s nipple at the intake. This was in a hidden spot (or that’s my excuse).
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