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		Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Trucks \| Utes \| Vans \|SUVs \| Crossovers > Ford Ranger Forum
ECM Problems??

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Ford Ranger Forum Forum for discussion of the Ford Ranger.

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04-09-2007, 17:26	#1 (permalink)
mtneer57 Registered User Join Date: Nov 2005 Posts: 42	ECM Problems?? I have a 98' Ranger that has been showing a malfunctioning Mass Air Flow Sensor, I replaced this with a rebuilt unit and had same results. then started checking other items, I read that the ECM is supposed to send 5 volts to the MAF sensor, this voltage is not present ( I am sure I am checking the correct terminal). I replaced the ECM with a rebuilt unit and had the same readings. Thought it could possibly be the ECM relay or diode but the ECM is supplying 5 volts at the TPS. After all of this, had the local AutoZone put code reader on it. It now shows a fault with the Idle Air Sensor and a O2 sensor. I don't know if it is possible that these other sensors could set off a Limp Home Mode and take the MAF offline. If anyone has encountered this, please respond.

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