idle going up and down
#1
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Join Date: Mar 2011
Location: max meadows,va
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idle going up and down
2002 f150 4.2 v6. the idle goes up and down when idling at stop lights and when clutch is disengaged.i replaced the iac and maf sensor but still idle up and down at about 200 rpms to 1500 rpms, any help or ideas also no check engine light is on
#5
check your vac. lines make sure there is no cracks or pin holes or anything to make them lose vac. pressure when i did my build i had the same problem it would gallop when it was in gear and sometimes even stall out, got all new vac. lines and runs like a champ.
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Flacotaco121 (04-13-2013)
#7
Do you have the diagram .?
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#8
#10
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Are you referring to the gas/fuel abg hose that goes to the vapor management system? If i remember correctly, it connects to the back of the throttle body, or it may be the intake. Can't remember exactly. But this one gave me trouble