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Is the check engine light on or restricted performance light?
NO INDICATORS OF ANY KIND. NO IDIOT LIGHTS ON THE CONSOLE/DASHBOARD. ALL MAINTENANCE UP TO DATE.
Ok
You may have a coil or coils that are breaking down or an engine vacuum leak. Even though there are no idicators on the dash there may be trouble codes stored in the ecm which will need to be read with a compatible scan tool. You should go to your local parts store or autozone as they will usually scan for codes at no charge. If there are codes stored this will help in the diagnosis of the problem. Let me know how you make out.
ASE Certified Technician
12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes