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Old 11-29-2012, 11:18 PM   #11
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I have had the fuel pump go out before, actually 3 of them and all three times it would either lose pressure sometime when accelerating or just die while driving. This is weird. No hesitation or change in the idle or anything..... when it finally does start it does run a little ruff though.
Thanks for the welcome! Sorry just banging my head on the desk with this problem. I really thought I had these focus issues mastered! It has everyone working on it stumped right now. UGH!
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Old 11-30-2012, 12:14 AM   #12
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So I just cleaned the IAC...It only happened every once and a while before, I mean 3 times in 4 years on long road trips. BUT as last week it's happening all the time now.
My IAC had the exact same behavior as yours. First time it stalled was way down in Natchez, Mississippi on a hot road trip in 2009. After that, only once every couple of months, but then got much worse in 2011 - stalled on every warm start. I was able to kluge it for several months by kick-starting the IAC (starting the engine with the air conditioning on); that worked every time.

I hope it's not your IAC...because no man should have to do that gawdawful repair twice!! I cleaned the hell out of my IAC about a year ago and so-far so-good, but alot of folks on this forum have reported that cleaning didn't work - they had to purchase a new unit.
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Old 11-30-2012, 01:24 AM   #13
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You guys are the bestest I know we will get this figured out! and then I will be one step closer to Focus fix it professional!
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Old 11-30-2012, 11:34 PM   #14
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So today when it happened I did turn the A/C on before I tried to start it. I noticed that after I turned the A/C on the temp gauge went down faster and I was able to start it again sooner then usual.

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Old 12-01-2012, 12:05 AM   #15
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you said in your original post "It will stay started if I keep my foot on the gas but will die back out once my foot is off the gas."

After you started it today with the A/C on, did it idle okay or did you have to keep your foot on the gas to keep it from stalling?
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Old 12-03-2012, 11:16 AM   #16
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Sorry for the delay. No, it did not stay started. It did not start until the temp gauge was almost all the way back down. But turning the A/C fan on helped bring the temp gauge down faster
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Old 12-03-2012, 11:50 AM   #17
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Check the fuel pressure when you shut it off and after 10-15 min. I had a 5.0 once that did this. It was cracked injector that was relieving all the fuel pressure, when shut off, into a cylinder and flooding the engine.

I'd say its either a Pressure regulator or an injector.
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Old 12-03-2012, 12:47 PM   #18
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Coolant temp sensor? When a vehicle is cold it adds fuel. When hot it should take away the fuel but if the temp sensor still reads cold it will over fuel it causing it not to start. Seen a few vehicles with no start / hard starts hot cause by coolant temp sensor.
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