2001 Ford Escape Q&A

2001 Ford Escape Question: Recently I had the spark plugs, oil filter, upper intake gasket, changed.

Now my car is having trouble picking up speed and when I step on the gas pedal it makes a loud screeching noise even when I just start the car it still makes rough idle and whistling and screeching noise and won't go higher than 20mph. I tried to drive, but I started to smell gas so I parked it. Please help -
Answer 1
could have a vacuum leak. also, these were bad to have the catalytic converter to stop up. probably need to go to shop to be checked. converters made on exhaust manifold. -
Comment 1
I am curious to know why I had no issues with this before changing the spark plugs and the upper intake gasket. Is it possible that the mechanic did not do his job right? -
Comment 2
can't tell ya if job done right. could take it back, if you trust they will correct any problem they may have made doing their work. -