every so often my car lacks power it feels like its holding back in power this only happens for a second or two then the power kicks back in + when this happens a load of black smoke and i mean loads blasts from the back then its ok ,any idea whats wrong
Last weekend i went up to the lakes which is a trip off around 230 miles there and back on the m6 at 70 MPH i filled my tank up full and when i returned home there was just 1/4 of a tank lefted ,i dont drive hard cos ive got the kids in the back, so i think somthing is wrong ???
That fuel consumption does seem a bit excessive. Mine does about 450 miles to a tank before the gauge reads empty, and that's driving with a lead foot too.
Check the wiring to no 1 injector
The EGR valve is behind the engine, near the turbocharger. It is about 3 inches in diameter and has a black small-bore vacuum hose attached to the centre of it, leading to a point on the bulkhead. Disconnect this hose (it should pull off easily) and try driving to see if it makes any difference.
Also check your air and fuel filters, and check that the catalyst hasn't broken up or something.