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using the wrong ecm they are very case sensitive .... i learned the hard way with my bronco ... bought a used one out of another bronco .... same motor different tranny ... the used ecm didnt see my overdrive... if you got yours used make sure everything about the donor car is the same as yours.... if you got it new you could probably punch the part # in online and verify its the correct one for your car ( but get the number off the ecm itself not the box )

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โˆ™ 2006-04-21 05:10:50
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Q: What would cause a significant decrease in gas mileage on a 1992 Dodge Stealth after the ECM has been replaced?
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