Tomthebeetleman
So I have a freshly rebuilt 1600 vw air cooled engine and it won't idle. I have done a lot of work on the engine. For example, it has a new crank, all new gears, new case, new cam followers, new heads, new post one and cylynders, new distributor, new carburetor, etc. Did a leak down test and it has virtually no leak. Did I fuel pressure test and it was well within specs. I ran the engine for a 20 min and cylinders 1 and 3 ran a lot cooler than the rest (I checked the temp at the exhaust and 1 and 3 were about 100°F less than 2 and 4). I checked the spark and they all looked good. At this point I'm pretty stumped. I have done a lot of tests so if anyone has any idea about what it could be I am open to anything.
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Wayne
When any vehicle won't idle I'd always look at the carb first. But since yours is new I highly doubt that there is anything wrong with it. Did you set it up properly? There should be an idle and mixture screw that should be adjusted. Here's a link from Rick Higgins that might help with this http://www.superbeetles.com/Tech_talk/may.htm
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Tomthebeetleman
I ended up figuring it out about a month ago. When I initially rebuilt the engine I didn't check the height on the cam lobes because I figured they would be good. Turned out that all the cam lobes had been worn down. I replaced the cam and the engine runs like a champ. Thank you for the input though!
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Wayne
That's great news Tom!
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drikson
I encountered the same thing and cleaning the carb solved the issue.
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