I've recently had a problem with my astra in that if I'm driving at 40+ mph and brake to slow down at roundabouts and change gear then the rpm drops from over 2000 to below 750 and the engine stalls. The car will then start up again once you turn the key while coasting. I've had the car serviced and a brand new thottle body fitted which didn't cure the problem. I was then advised to get an ecu update which I had done at a vauxhall dealer. They also cleaned the egr valve which they found to be stuck shut as well. I've drove the car once since then and the car seems to be driving ok with no stalling.
Therefore how does the egr valve cause the car to stall when braking and changing gear????. And also is it possible to blank off the egr valve on a 2001 1.6 16v????.
Any help would be appreciated