Cavalier, Calibra, Vectra, Signum, Sintra & Insign
Hi, in need of a little help!
The power drops off the edge of a cliff anywhere between 50-70 MPH at approximately 2-3000RPM.
The fault is only apparent in 4th, 5th and 6th.
My local garage have plugged in their diagnostics; MAF Sensor, High pressure (or compression?) across or 4 cylinders...