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my car is having trouble picking up speed on 2002 Mazda Protege

3 days ago i got my car a tune up and oil change.my car has trouble picking up speed, when i'm at a stop light it starts to shake. and my check engine light is flashing.

Asked by for the 2002 Mazda Protege
take it back to the shop that did the tune up and have them re check. it sounds like you have a bad coil or wire that they may have missed.

Roy
1 more answer
so with that require a diagnosis test or they can just look at it and know