4g63turbotsi

Sometimes when im driving and i just press the throttle down my voltage rises to 16. then my oil pressure rises slowly too. after a while it will usually drop. i think its my alternator but im not sure. any help would be appreciated

J-Rat

iTrader: (2)

You had better check that with an actual multi meter. Your gauges can be somewhat innacurate.

Wanked_FC

iTrader: (1)

Generally it will rise a little because the alternator speeds up as the engine speeds up. If you're seeing like 12-13v at idle and 15v+ at speed its probably your voltage regulator on the alternator. It should generally never read above 14.8volts. Oil pressure should rise with speed, thats normal. Should be 30-45 at idle, and around 60psi at 3000 rpms. If you're seeing like 45psi at 3k it might be a bad thermal pellet.

Dvst8

iTrader: (6)

the voltage is suppose to increase, the more throttle you give the faster the alternator will spin, therefore generating more voltage.

same theory with oil pressure.

J-Rat

iTrader: (2)

Not necessarily,

The alternator has a regulator that SHOULD keep the voltage from rising above something like 15 volts or so.

Jarrett

Wanked_FC

iTrader: (1)

hence my thought of a possibly bunk voltage regulator

J-Rat

iTrader: (2)

Yeah, after posting that, I noticed your post. Sorry..