Hey Guys,
I have a 99 toyota corolla ce, and it was running fine a while ago. Two months back, just before winter i changed the spark plugs, the coolant, air filter, oil filter, got a transmission flush done. Also about a month ago I was behind schedule for my oil change by around 800 miles but got that done too. Now I have noticed that when my car is in Park i.e. idle the engine makes a lot of noise as if running at high speed or something. As soon as i put it into any gear it sounds normal. Also I have noticed a marked decrease in my pickup and my engine is not as smooth as it was. I can sense it especially if I rev it uphill or try to speed up it seems as if the engine is getting stressed. Earlier i used to get a mileage of about 30 to 32 mpg now it has come down to 26 to 28. Can anyone help me with this please..........