There is a grinding/squeaking noise coming from what sounds like the front driver side wheel area. It is not constant… the interval between each occurrence is relative to vehicle speed. When moving slowly, like in a neighborhood, the gap is about a ½ second. The gap lessens til I hit ±65mph, when each occurrence runs into the next and the sound is pretty constant. The 10 fill-ups before this started I averaged 42.3mpg, my last 2 fill-ups average to 37.6mpg…
Oh, there is no audible sound when the car is on a lift…
At first I thought a dragging brake but there is no change in the sound when the breaks are applied…I bled the lines anyway…no change.
I thought CV joint, but, from what I’ve read, the tell-tell clicking and worsening under heavy cornering is not present.
Maybe a wheel bearing? I’ve done the simple bearing test of trying to wiggle the wheel left-to-right & top-to-bottom…no movement.
By the way, this is a manual transmission and the sound is present whether in gear or in neutral or coasting with clutch depressed.
One more thing I should mention, and this might be important… my first poor mpg result coincided with me disintegrating a rod bearing…(low oil) I did replace the bearing with the appropriate size. I measured the crank journal with a micrometer and it still seemed to be right at the factory specs. There were no scores or gouges in the journal. (As soon as I heard the loud ticking associated with a bad rod bearing I shut the car off and pushed it to work where we have a lift. Luckily it was only about a mile and was pretty flat…it doesn’t hurt that the car only weighs 1,800 lbs. either.) Anyway, I reassembled the bottom end, torqued the rod cap according to the factory service manual, torqued the oil pump and the oil pan, added new oil and started it up. It ran, and still run, nice and smooth.