Going over 3000 rmp causes loss of power and ECU light
I have a an Astra 1.7 TD LS which loses power when I go over 3000 rpm, especially when motorway driving. I feel the car pull back, the ECU light comes on, stays on, and car goes into limp mode.
Has been into local Vauxhall dealer 4 times, first fault code showed problem with Vacuum Hose which was replaced, second time got no codes and changed MAF, third time no fault codes and fourth time code showed "Bad Fuel". They dont seem to have any idea what is causing problem.
I suspect it is something simple like timing belt or one of the sensors. Any ideas as im tearing my hair out with this???