injectors stuck open?????

[94f450sd]

ok well as most of you may remember ive had a skip i cant find since i put this engine in.now im haveing a fuel pressure problem.it will start loseing power and smoking.the more power it loses the blacker the smoke.itll do that till it wont run and dies.fuel pressure gauge says 0PSI.crack the fuel line loose and youll get sprayed with fuel.shut it off for about 10 minutes the fuel pressure will slowly come back up and it will restart but binds like the timing is too far advanced.and all through its tantrum it knocks and pings like a mutha.


think i have an injector or 2 sticking open?bad idm or wiring??

 

[Zookie400]

usually when an injector sticks open it will get airbound, perhaps there is a broken tip or something like that.....did you try unplugging one at a atime to find the problem child?

 

[94f450sd]

ive done everything you could imagine to find the problem.

 

[Zookie400]

so its a good one!

just for a better picture of whats going on....where do you have hte fuel gauge tapped into?

 

[95_stroker]

What are the results of the buzz test?

 

[94f450sd]

fUel pressure gauge is on the return side of the system.i have the BDP electric fuel system.thats why im leaning towards a sticky injector/s.


passes buzz everytime.

 

[Zookie400]

is it growing oil?

 

[94f450sd]

no

 

[rickh]

If an injector was stuck open, your truck would not stat due to loss of high pressure oil.
I would suspect the actual electric fuel pump. They are just not as reliable as the stock mechanical.
Next time you drop to zero psi, jump under the truck (providing its parked) and feel the pump, is it running? If the truck dies you may have to jump the oil pressure sensor to make sure there is power feeding to the pump.
They ain't cheap so some diag time is well spent.
Fuel filter ok?
Rick H...

 

[dpantazis]

is this the 'replacement' engine with old fuel system on it? which HPOP are you running?