when car is in drive it starts shaking and vibrating on 2002 Kia Spectra

2002 kia spectra automatic trans when on the highway , shift good, but when I stop and try to go it doesnt have any power unless I shift to park raise the rpm and then it goes?

1 answer
UNFORTUNATLY YOU DO NOT HAVE ENOUGH INFO TO DIAG. THIS WAY,HOWEVER THE FIRST THING I WOULD CHECK IS YOUR CATALITIC CONVERTER. A PARTIAL BLOCKAGE CAN START WITH SIMALAR SYMPTOMS. THE ACT OF REVING UP THE RPM WHILE THE ENGINE IS NOT UNDER A LOAD CAN BLOW OUT SMALL PARTICALS THUS ELIMINATING SOME OF THE BLOCKAGE TEMPORARALY. GOOD LUCK.

DAN
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