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2006 Ford Freestar Question: fuel supply

 

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lrt, Ernul, NC, January 24, 2011, 14:54
 Rookie

upon starting the vehicle in the morning it turns over good hits and cuts off immediately like it's starving for gas. After several attempts it cranks and runs fine. after sitting for a while it will do it again. It's like it is loosing its prime.
I've replaced egr valve , spark plugs, fuel filter, cleaned maf sensor. Also hear a slight sound in intake air filter. like pop corn popping

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  • Answer #1

    DaveJHM January 24, 2011, 22:06
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     Master

    Sounds like you may have a sticking idle air control valve. This, if sticking, will allow air into the intake, even when it's supposed to be shut. This couldl make it a hard start and stall situation.

    You could also have a vacuum leak somewhere around the engine.

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    lrt, February 11, 2011, 16:04
     Rookie

    Cleaned air control valve. Replaced battery , EGR valve ,cleaned maff sensor, replaced throttle positioning sensor. Still acting up. It ran good for a week and now its stalls . you try to give it gas and it dies, does not cut off but will not take it. hooked an obd 11 reader to it and it has no codes. I was told to take it to a dealer to have the computer rebooted to relearn the settings?

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    DaveJHM, February 11, 2011, 22:45
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     Master

    Idle air control valves don't clean up very well - so that's one thought. Also, make sure the EGR system has good flow...clogged passages can pose problems. Also what does the fuel pressure look like? Low fuel pressure can be trouble.

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