Hi my 4 litre v8 is holding back when you put your foot down seem to be missing something . Not over heating starts first turn off key . No smoke . Does not seem to be miss fireing . Doing my head in??..ho engine management comes on now and again?.

 

I've moved your question from General Tech Help section to S-Type section. Members here with the same model as you have will be able to offer advice.

Graham

 

Get the codes read and we'll go from there.