Volt drop

[Scolagiaco]

1998 Mustang GT V8 SOHC 4.6L Noticing lately that after the car has warmed up, I lose around 2 volts from the meter. Sometimes, it loses power during acceleration at times when this drop occurs, feels a little sluggish. My first thought was the coil packs maybe to blame. They are the original coils now with approx. 150,000 miles. Anyone else have any ideas before I go and buy new $300 coil packs????

[dougbfresh]

Unlikely it's the coil packs. I would think the rpms drop after it gets warm and the voltage would drop a little. What does it read by the way(cold and warm)? If anything, I would suspect the voltage regulator 1st.

[justen]

I don't think it's the coil packs, it would draw the same amount of volts all the time. Coils either work, or don't work like a light bulb. Something else is drawing the voltage down, Being you mentioned poor acceleration, I would look at the fuel delivery system, It's possible your losing your voltage there.