 Fuel Percolating in Carb.... |
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| MikeM |
 May 23 2019, 06:28 PM
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#1
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Senior Member  Group: Members Posts: 564 Joined: 16-May 10 From: Calgary, Canada Member No.: 11,733 Region Association: Canada  |
Hi all...my friend and I are both having the same problem with fuel boiling or percolating in the carbs after shut down. It drips out of the carbs and onto the intake manifold. It's not much but it's dangerous and smells terrible. We both have Weber 44's and we are using the thick spacers between the heads and intakes. I have ordered the thick spacers for under the carbs also. Is there anything else to consider with this problem?
It wasn't even hot today and oil temps only about 200 degrees!! Any and all suggestions appreciated!! Mike |
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| MikeM |
May 24 2019, 03:15 PM
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#2
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Senior Member Group: Members Posts: 564 Joined: 16-May 10 From: Calgary, Canada Member No.: 11,733 Region Association: Canada |
Yes, I'm using the spacers between the heads and the intake. Just ordered the ones between the intake and carbs.
Thanks |
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| porschetub |
May 24 2019, 04:51 PM
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#3
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Advanced Member Group: Members Posts: 4,706 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(MikeM @ May 25 2019, 09:15 AM)  Yes, I'm using the spacers between the heads and the intake. Just ordered the ones between the intake and carbs. Thanks Where is the pump located ? not in a hot area ?,you can't have any raw fuel in the carb throats as this fuel isn't atomized ,have you got a regulated fuel pump? if not this may be your issue,the float valves get over pressure and simply don't seal when they should be closed. The fact you have fuel on the outside of the carbs is a worry,how your fuel is getting so hot is a bit odd as the spacer blocks are designed to stop heatsoak from the heads to the inlet manifolds that's why Porsche used them on the stock FI motor. |
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Posts in this topic
MikeM Fuel Percolating in Carb.... May 23 2019, 06:28 PM
Chi-town How are your fuel lines run? May 23 2019, 06:35 PM
MikeM
How are your fuel lines run?
I think just the us... May 23 2019, 06:41 PM rhodyguy Fuel is dribbling on the outside of the carbs? Bot... May 24 2019, 08:52 AM MikeM I would not say it's dribbling out, a few drop... May 24 2019, 09:50 AM brant adding a return circuit can be a big help with thi... May 24 2019, 10:26 AM injunmort do you have insulating blocs between the heads and... May 24 2019, 12:34 PM rhodyguy With the pump energized, not started, can you see ... May 24 2019, 06:47 PM MikeM No...you can only see fuel after about 15 minutes ... May 24 2019, 07:44 PM |
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