Re: 4.0 OHV Coolant extremely cold
T-stat issue, replace with a Motorcraft for best result and make sure colling system completely urged of air. As for codes, please post the actual code #; A lean code need not automatically mean MAF, readers need to code # to evaluate the situation and reply.
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2004 Ranger FX4 Level II, 5R55E, Sonic Blue Pearl
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