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4.0 won't run with maf sensor connected

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Billy5076

New Member
Joined
May 17, 2015
Messages
3
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City, State
Weatherford, TX
Year, Model & Trim Level
2003 Ford Explorer
I replaced the timing chains on my '03 explorer, and now it will only run with the maf sensor unplugged. I have 20" vacuum. What did I do wrong?
 






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