Hi all... Just bought myself an auto meter to check a few timing bits and pieces...as I have a popping \exhaust backfire when "rolling" down hill...we live on the top of hill, everytime we head out we have a short 2 min drive then a long downhill coast, which is when the popping begins...popping not been noticed when engine running or when lifting off gas in traffic.. Kombi is running well, its starts and idles good, acceleration is better than I expected, (compared to an old series 3 land rover)... I have new distributor points plugs leads etc etc...all valves adjusted to correct settings and general engine running is good... Timing correctly set etc... But the new dwell meter is giving me a dwell angle reading of 82° .Which can't be correct can it? Would the engine run at 82 dwell it wouldn't run would it??? Could this be cause of popping? Maybe i bought a dodgy meter thingy ? Any other reasons for popping and backfiring?