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Hi Guys I need to know if is normal to have in the MAF and Ignition Coils 12.50VDC engine OFF and Switch ON And With The Engine On 14.30VDC..? The same Voltage the Alternator Have ....!!!! I Have A New MAF and I don't want to install it until been sure I wil Not Burn it ...!!!! Kia Sedona 03 LX ...!!!
 

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KIA Sedona 2005 EX 3.5L Automatic
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Unless somebody that is an expert disagrees, I would say this seems perfectly normal. When the engine is running, it is running off the alternator power (the battery is then being charged by the alternator), so the power supply is the alternator. And an increase from 12.5V to 14V seems perfectly normal to me. I haven't measured it in our Kia, but that's what i get in my Saab (12V on just battery...close to 14V when running).
 

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Ok But You Take Those Readings With The Engine Runnig At The Ignition Coil Or MAF...??? Because I Know Is Normal At Battery+ Cable But Not That Sure At Ignition Coil Or MAF Normaly Those Components Works With 12VDC Engine Running But Never Seen A Ignition Coil Or MAF Working With 14.30VDC ...!!!! Maybe I'm A Little Bit Ignorant But Im Want To Be Really Sure....!!!! Thankxxx Man ....!!!!!
 

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Agree with Gidner: you should see (B+) voltage, so if the alternator is engaged, you would see 14.3 volt output at the Ignition coil (B+) hot lead, and at MAF connector pin (2) B+ lead..

At the MAF connector, you should measure (4.8 - 5.2) volt at MAF connector pin (4) against ground: that's the (+5 volt) reference voltage supplied from the ECM,

Above is from the kiatechinfo website (see my sig.), you can sign up using Internet Explorer web browser (see reqs. main page), where you can access the Service Info for your vehicle / the MAF diagnostic procedure online:

SEDONA(GQ) >2003 > G 3.5 DOHC > Engine Control/Fuel System > (Repair procedures)

Regards,
GottaCruise
 
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