starting hot vs. cold

sonofherbie · Post by **sonofherbie** » Mon Jul 09, 2007 6:58 am

Just replaced my carburetor, and my '66 is running beautifully. However, I've noticed that while it starts the first time everytime when cold, after a drive (20 minutes +), if shut off, it doesn't want to start again for a while (till it cools?). Any suggestions?

Thanks much!

scruffy · Post by **scruffy** » Fri Jul 13, 2007 5:09 pm

Check your fuel lines in conjuction with heads,exhaust which may cause vapor locking or air bubble in fuel line.Also check if your intake is frosting up which is caused by a plugged heat riser. Hope this helps,mine vapor locked on me 100 miles from nowhere recently and took me 3 hours to prime the fuel pump! 91 degrees is to hot and somebody forgot to open the flaps and let the hot air out which didn't help! Maybe I should reinstall my thermostat?

sonofherbie · Post by **sonofherbie** » Mon Jul 16, 2007 8:55 am

Much obliged, Scruffy!

elkluvadore · Post by **elkluvadore** » Wed Jan 02, 2008 9:30 pm

Ive been reading some of my hotrodding vw books, they state that the vw engine is very tempermental about the fuel giving to the engine, an offset of ratio of gas to air would be enough to cause your vw problems, being that the vw is aircooled the air in the engine compartment has the most variations, remember science? cold air(when you start it) is denser then wamr air( when it has been run for a while) with the denser cold air the fuel to air ratio is going to be higher then when the air is warmed up, if the ratio is thrown off far enough ( remeber the tempermental vw ratios) the engine would not want to run properly and/ or run, so I'm not sure what this means, adjust the carb a little, slim done the ratio so it makes it harder to start but run when its warmed up. I think im over thinking this thing but heck I like to feel smart every once in a while.

volksbugusa · Post by **volksbugusa** » Thu Jan 03, 2008 6:19 pm

sonofherbie
in order for me o help you i need to know the following
-what carb are you running?
-what distributor are you running?
-did you adjust the valves ?
-did you touch the distributor in any way
-you had to have done more then the carb what else did you do//

matt
volksbugusa

scruffy · Post by **scruffy** » Fri Jan 11, 2008 7:46 am

boy I have to get back here more often.I forgot to ask after seeing what Matt posted. Won't start after you drove it and engine warmed up to temp?Does it turn over when hot or only after it cools down? If that's the case it would be the front bearing on your starter seizing up.

elkluvadore · Post by **elkluvadore** » Mon Jan 21, 2008 11:54 pm

nah, just give it a good kick on the tire when it dies, shell start right back up