HJS815

What's that growl when I start the Car?
The noise happens when I start turning the steering wheel. Car is a 99 Coupe with 41000 miles on it. Seems to happen when the car is cold or already heated up. Power steering level is up to the mark. . . John

JCGRCYA

Is it a "growl" or more like a squeak. Mine was doing the same thing, I think, and I mentioned it when I had the car in for service. They said all they did was lube some part in the steering column or something and it went away. Later I found this tech tip (see link), which better describes what the dealership did. Hope it helps.
https://www.corvetteforum.com/techti...D=35&TopicID=1

HJS815

Sounds like a groan or grinding sound, not a squeek. Will look into the addition of lithium grease. Thanks

HERK

its the tiger in your tank. sorry just had to.

vert99

is the car a automatic? if so could be drive belt rumble.

RocketDawg

I don't know what it is, but I've got the same thing. Seems to happen upon startup and with a slight turn of the steering wheel. It goes away after a few seconds, but you can feel it in the steering wheel and the engine rpm's decrease a bit. And, of course, it's intermittent.

SteveDoten

the air pump under the driver's side healight area kicks on to lower emmisions, cats light off quicker, this could be what your hearing; it is an electrical air pump and is no way related to any steering movements

HJS815

Thanks for responding to my efforts to find the groan/growl. You replied that the noise might be the sound of the cats firing. I have tried waiting a few moments before turning the steering wheel. It seems to be related to the turning of the wheel. What does a power steering pump sound like when it is about to fail? Problem occurs when the car is cold (morning sickness) and when the car is warmed up. I like your old job of working on my favorite aircraft (A-10). Thanks, John