15-16 Volts. Dimming lights!!!

[moorcroft]

Just got my car back from RPI after having the head gaskets replaced. However I have noticed that on the way home my volt gauge reads 15v, sometimes going to 16volts!! I also have lights on the dash and the headlights going bright and dim fairly fast. Im guessing that this is the alternator voltage regulator, however find it weird it occured whilst they were working on the car. It also appears to make the car run poor!!! Any one else experienced this problem. Many thanks. I have checked the wires at the rear of the alternator and all seems as it was before it went in.

[The AJP Griff]

Sounds like the regulator.If i were you i would get it professionally checked before further use,you dont want to 'boil' your battery and add to the misery.

[moorcroft]

Ok, Alternator replaced and the car is finally running sweet!! I can't believe how much a faulty alternator can effect the cars running!! Finally reaping the rewards of the recent top end rebuild (after leaking head gaskets)!!

[That Daddy]

Thats how my original died,it just came on all of a sudden flickering my headlights original had big mileage so swapped over with a new unit.