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Ignoramus10095 Ignoramus10095 is offline
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Default Chevy Kodiak dumptruck gasoline problems

On 2012-02-15, Pete C. wrote:

Ignoramus10095 wrote:

On 2012-02-15, dpb wrote:
On 2/14/2012 7:14 PM, Ignoramus10095 wrote:
...

dpb, here's where I am lost.

The carburetor, visibly, does NOT have a bowl. It does, however, have
those electric valves on top. It might have a bowl, but its location
is not obvious or visible.
...

I hadn't looked at the closeup pictures before, but just did after
thinking about the year. It's one of the hybrid injection systems.
I've had a couple but never had to work on one so forget the earlier
thoughts posted--they're not pertinent to these.

I think the phrase is "throttle body injection" for looking for information.

If I were to hazard a complete guess, it would be after two years idle
the injectors are plugged. How to attack them, specifically, I don't
know, sorry.

--


How do they work, do they create pressure, or are they just valves,
with the pressure created by the in-tank pump?

i


A fuel injector is just a solenoid actuated spray nozzle. The in-tank
pump provides the fuel pressure and the pressure regulator regulates
that pressure sending excess fuel back to the tank via the return line.


OK, now I have the picture, I think. I am now thinking of proper ways
to troubleshoot this.

I guess that a first test would be to activate the fuel pump without
cranking (by turning the ignirion key almost to the crank position),
and apply 12v to the injectors.

Depending on whether they spray fuel or not, I will know what is wrong
or at least will move in the right direction.

Thanks

i