new fuel pump, new plugs, car still shutters around 2-3 RPMS check engine on on 2000 Jaguar S-Type

what is the estimated cost? could this be the throttle body? Could it just be cleaned or will I have to replace it?

Asked by for the 2000 Jaguar S-Type
Need to get that check engine code, or you are just guessing, that is the key. There will be one or more codes that will help you to pinpoint the cause of for problem.