| Re: [GMCnet] Vapor lock feedback [message #318489] |
Sun, 04 June 2017 21:51  |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
|
Senior Member |
|
|
Sounds about right to me. Keep your tanks full of cool fuel, travel early
in the day. That's about it. Summer blend fuel only.
Jim Hupy
On Jun 4, 2017 7:47 PM, "Chris S." wrote:
Hello all:
I was looking for some additional feedback on vapor lock, mainly what kind
of conditions that you have seen it in. We seem to be troubled by it when
temps get up over 83-85 degrees outside, it first started last summer going
down the Florida where temps got up to 93+. Since then, we've had an
inline fuel pump and rebuilt carb installed by JimB, that seems to have
done the trick for getting around the issue (which only seems to happen when
slowing down or stopping and trying to get going again).
Also since the inline fuel pump, we've had an aluminum ported Offenhauser
intake manifold installed, with the Paterson blockoff kit. We had this done
due to cracking of the original manifold. Some thought maybe this would
help with vapor lock, however today we again had it happen to us, temps
outside were around 83-84 degrees with full sun, we were on the highway for
about 45 minutes after taking off cold. After exiting the highway,
stopping at a sign, and accelerating again on a backroad, after 10 seconds
while accelerating the engine starting surging a little bit. After
flipping on the electric aux pump, the surging went away after about 15-20
seconds. We were running the dash AC at the time as well.
Does this seem to be a little bit extreme with it happening when it's 83-84
degrees out, or is this pretty much what everybody else is experiencing?
And is the main fix still just using an aux electric pump back near the
tanks? I can't imagine this could be anything else besides vapor lock.
Over
the years we've had everything in the fuel system either replaced or fixed:
fuel tanks cleaned & coated, new rubber hoses & fuel filter, new solenoid,
new inline fuel pump and fuel system check (by JimB), new Carter mechanical
fuel pump, rebuilt carb (from JimB), new aluminum intake, and even a new
fan clutch (Delco 15-4947). Everything seems to be in order.
Feedback, thoughts and anything else is more than welcome. Thanks all!
Chris
--
Chris S. -
77 Kingsley, 3.70 FD, mostly OEM -
S.E. Michigan
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
