EGR Delete Dumbarton. Our EGR delete in Dumbarton stops soot and oil being fed back into your intake, giving you a cleaner inlet manifold, cleaner running and no fault codes. Sticking EGR valves throw codes every other week and choke the engine — our software delete removes the monitoring and lets the engine breathe properly. Covering Dumbarton and the Leven valley with a lifetime guarantee on every file.