80'sthrowback
07-01-2008, 10:51 AM
Hi all. I'm new to these forums so please bare with me. I have a 68000 mile Scirocco GT2 with a weber conversion. On cold damp mornings the car starts fine (manual choke) but after I have driven it for 15 miles at 60ish it just won't idle. As soon as I drop the clutch the car just stalls. It starts again straight away but it won't idle and no amount of choke will make it do so. Once I have been in traffic for 5 mins or so its fine (still idles a little low from time to time). The most obvious answer is carb icing but I'm not so sure. I have repaired the vacum pipe in the airbox and that works correctly. I have also disconnected the air pipe so that the carb gets fed with the slightly warmer air from the engine bay. Additionaly, I have tried a different Carb, different distributor, new leads and a replacement carb gasket all to no avail. One final thing to note is that the car doesn't fully warm up until I have driven it the 15 miles and got it into traffic. (heats up quickly then). I have replaced the thermostat but that doesn't seem to have made a difference. Not sure if the temperature issue is related as I have plently of warm air dspite the gauge reading. Anyway I'm out of fresh ideas and I'm wondering if anybody else has seen this before.