[T2] Power loss in 4th

[Dave Gillingham]

Another fairly easy possible solution:  try an electric fuel pump.  They're not silly expensive, and probably better in the long run.  I think the coincidence of the pump/line change with the new problem points to one of those items, and if you have checked the line, it must be the pump

Sent from my iPad

> On Oct 13, 2015, at 6:19 AM, Erik Burtis <ewdb92 at gmail.com> wrote:
> 
> Tom,
> I'd start by checking the fuel line as it goes around the manifold on 3/4
> head and out the front of the engine.  Then check to see where it rests as
> it travels to the gas tank.  I've seen issues with the line being too close
> to the manifold and/or the heat exchanger (especially if the exchanger
> isn't hooked up to the bellows).  The suddenness of this issue after your
> work changing the lines/pump doesn't sit well with a clog, perhaps the line
> slipped and now rests too close to heat.
> On the clogging side of things, I was thinking that if the engine formed a
> vacuum in the fuel line as it starved for gas, perhaps that could cause the
> noise you hear after shutting the engine off as gas slowly trickled past
> the clog, pulled along by the vacuum. You can check for clogs the next time
> this issue appears by pulling the line to the pump and seeing how much gas
> comes out into a can.  But doing this on a hot engine is tricky so be
> careful you don't spill the gas!  Use vice grips or snap clamp to help
> start/stop flow.
> Erik
> 
> On Mon, Oct 12, 2015 at 11:06 PM, Avocado Tom Tarka <avocadotom at gmail.com>
> wrote:
> 
>> Erik,
>> 
>> That wouldn't surprise me.  I've never experienced vapor lock, so I'm not
>> sure how or why that would happen.
>> 
>> Hence the questions...  :)
>> 
>> Maybe the engine is getting hotter than it was?
>> 
>> Cheers,
>>   Tom
>> 
>> ---
>>  "We are MoTown.  We are professionals.  We're here to get the job done."
>> 
>>> On Mon, Oct 12, 2015 at 5:36 PM, Erik Burtis <ewdb92 at gmail.com> wrote:
>>> 
>>> 
>>> Any chance the fuel line is too close to a heat source?  Perhaps the fuel
>>> is boiling with the higher temps of driving up hill and slower rpms not
>>> moving new fuel through the line fast enough.  The fuel expansion could
>>> push fuel into the carb after shutting the engine off.  This characteristic
>>> is the only thing that bother me with a line/tank clogging issue.  Your
>>> symptoms remind me of boiling gas in my chainsaw last summer.  Loss of
>>> power at low rpms, noisy carb, etc...
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