I had my engine given the once over the other day and it was found that there is a sheered manifold bolt.
The guys said that it was down pretty deep and couln't take it out using conventional methods
Is this going to be affecting the car's running? I'm noticing the car being a little lumpy when cruising on the motorway when going on the power (could this be that too much air is being sucked in?) Also as a consequence, could the ECU be compensating by pumping in more fuel as it has become very thirsty lately?
Any help would be grateful