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    Danny-O's Avatar
    Danny-O Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jun 13, 2014, 07:04 AM
    2009 F250 going into limp mode with temperature increase
    My 09 F250 super duty will run just fine when the temperatures are cool, say below 75 degrees. Let the ambient air temp warm up and the computer goes into limp mode; I loose cruise control, acceleration and mpg drops. I have replaced the Mass Airflow sensor, no change. Cannot figure this one out.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Jun 13, 2014, 07:51 AM
    Did you install a new chip? How many miles are on the truck? Sometimes, fuel pump head clearances increase and fuel pressure drops on old, tired pumps. Have you checked for codes?
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