Hi, I have just bought this car. When it runs on tickover it keeps dropping to about 600 rpms. I have adjusted it by tightening the screw so it idles at 1000rpm but it keeps dropping down. Also I have noticed when I first start it it seems to struggle for the first couple of miles until it warms up. I have replaced the spark plugs with NGK BKR6EK plugs but it still misses.
Any ideas would be welcome.