Fixes for difficult starting.
Bruce:
I'm currently driving a stock Beetle that's got rust getting past the filter into the carb, so I have to take the carb off and clean it out a couple of times a year. Every time I take the hose off the carb, pressurized fuel sprays out, meaning that the stock pump holds pressure against the inlet valve.
In your engine, maybe this pressurized fuel is leaking past your inlet valve in the 15 min you are stopped, flooding your engine.
My modified Beetle has an electric pump, and as noted above, I switch it off before arriving at my parking spot. This guarantees there's no pressure in the lines to flood the carb. It's a good anti-theft tool too.
Here's the pump to get:
https://www.ebay.com/itm/Electric-Fuel-Pump-Carter-P60504-P90091-In-Line-12V-2-4-PSI-/113181202483
Don't get a Holley pump, it's got to be the worst pump on the market. They are unreliable and sound like a jackhammer when they're running. They put out too much pressure for us, so you have to buy another part that can fail called a regulator. Remember the famous quote from a GM Service director in Detroit, "parts left out cost nothing and cause no service problems".
The Carter is internally regulated to the correct pressure for us and it can't be heard when the engine is running.
Martin S.:
Bruce it sounds like your gas tank is rusted?
I agree excess fuel pressure on shutdown could cause the problem. I only use the more expensive stock mechanical pumps available now with the built in shut off valve. Just like VW had before everyone replaced the original pumps that had the shut off valve with a cheap repop one with the omitted valve.
Jim Ratto:
I fought carb heat soak from 2002 until 2017. Phenolic spacers 13mm thick resolved the issue, after several other attempts to fix.
andrewlandon67:
Quote from: Jim Ratto on July 05, 2019, 17:26:00 pm
I fought carb heat soak from 2002 until 2017. Phenolic spacers 13mm thick resolved the issue, after several other attempts to fix.
I'm currently waiting to hear back from Gary Berg about a set of spacers for my 44s. Hopefully those will solve my issue as well. I'm also switching to an electric pump, but that's mostly for starting my car after the long periods of sitting it seems to be going through. Still, I think it might help to be able to push some fresh fuel into the bowls faster than a cheap mechanical pump.
andrewlandon67:
Quote from: andrewlandon67 on July 08, 2019, 16:29:20 pm
Quote from: Jim Ratto on July 05, 2019, 17:26:00 pm
I fought carb heat soak from 2002 until 2017. Phenolic spacers 13mm thick resolved the issue, after several other attempts to fix.
I'm currently waiting to hear back from Gary Berg about a set of spacers for my 44s. Hopefully those will solve my issue as well. I'm also switching to an electric pump, but that's mostly for starting my car after the long periods of sitting it seems to be going through. Still, I think it might help to be able to push some fresh fuel into the bowls faster than a cheap mechanical pump.
I haven't gotten the spacers installed yet, but the electric pump seems to be helping as hot-starting my motor has gotten considerably easier over the past few days of driving my '67. There's still some spitting from the carbs, but nothing like the issues I was having with the mechanical pump. Hopefully this Saturday I'll have time to get the spacers installed and finally see how it responds, but I'm still stoked to be headed in the right direction, finally.
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