Recently I have noticed my 1993 Volvo 940 makes a noise
while driving, that sounds as best I can describe as a card in a bicycle spoke;
or kind of like the putt-putt sound, you hear from a large truck idling next to
you. I hear it while driving, whenever
stepping on the gas pedal, but not while idling, or when the car is in park or natural. The faster I accelerate the louder the noise
is. I want to try to trouble shoot this but I do not
know where to even begin looking into this. Maybe there’s a leak somewhere.
Any suggestions are appreciated. Please and thank you.