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#1
11-16-2008, 11:43 PM
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Performance chips? 93 4.9l f150
i was wondering about this performance chip ?http://cgi.ebay.com/ebaymotors/REAL-...Q5fAccessories. i got a 1993 f150 4.9l f150 4x4
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#2
11-17-2008, 03:02 AM
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Re: Performance chips? 93 4.9l f150
It sends a false signal to the PCM (Power Control Module) through the IAT (Intake Air Temperature) sensor. Maybe someone else could clear this up, but I think it is simply a resistor inside a box that you could by at Radio Shack for 50 cents. It sends a signal to the PCM that the air charge is colder. This changes the mixture and changes the advance on the timing. They put it into a box to keep you from seeing what you are really getting. Does it work? I don't know.
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