Hi guys, Recently purchased a little Trabbi to restore to health. Took a test trip out to check all was well, mechanically. I know this sounds silly, but I felt the Trabbi was down on power. Along a gentle incline the car started slowing to a crawl. A road with a gentle incline (you'd think it was flat) saw me in 2nd/1st. Heard a knock from the engine infrequently under load. Very infrequently, but enough to make me wonder. A steeper incline saw me in 1st gear - walking pace. From what I've read, this should not be the case even with a Trabant. I was wondering where first places to start would be on a Trabant to make sure the engine was running normally & in good health? The engine is of unknown service history & I'd like to give it a thorough check over/service/overhaul etc. I can happily spanner away on anything, but I lack the experience to be able to effectively diagnose issues. Any advice appreciated.