My car, is chug chug chugging along? On full chat it seem to go, but on revving and general poodling along, she ‘chugs’? Seem like she is clogged up or fuel is struggling to get through etc? Maybe a spark? Injectors?
Might also be worth reading the stuff in the FAQs about crank nose failure, it is mainly restricted to early Mk1 1.6 cars, but later cars have suffered