167k miles
Recently at highway speeds the rpm's would drop, then rpms would rise back to where they were and the car would obviously jerk. I cleaned out the tb, changed spark plugs/wires, dist. cap/rotor. Everything seems to run fine now, but I noticed that it seems to have lost a little bit of power and my gas mileage has also went down from 27/town - 32/highway to about 24/town - 27/highway. Anybody have any ideas what would have caused this? The only thing I could think of is the spark plugs were NGK brand with the fancy little platinum tips that you can't gap.
Only odd thing i've noticed otherwise is: When the car is started up and it's very cold outside, I can hear a whistling noise if I push on the gas a little. The noise increases with RPM's so maybe a vacuum leak is to blame. (NOTE:whistling noise goes away once the car is warmed up)
Any ideas are appreciated
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