I'm having an issue with my 2001 Solara, and I would like to check out a few things myself before I have a mechanic spend lots of time diagnosing the problem.
When the engine is under load -- I press hard on the gas pedal, or the car is in cruise and goes uphill -- the engine spikes from cruising power to 4-5000 RPM. As best as I can tell, the necessary load has dropped (the problem has gotten worse) over the past few months.
My car has about 130k miles; it's a manual transmission, and I'm due for an oil change anyway.
check engine light has not lit up.