5.7 vortec hesitation and bog HELP *FIXED*

[travis mattson]

55 psi as of Monday night, crank no start Tuesday morning, 60 -66 psi is spec

 

[Schurkey]

So WHY can't your vehicle meet spec for fuel pressure? There's multiple possibilities.

 

[travis mattson]

I'm going to try new injectors before replacing the new pump again

 

[thegawd]

how about the filter?

 

[thegawd]

swapping the injectors is not going to increase the fuel pressure when the fuel pump creates the pressure.

 

[Schurkey]

I'm going to try new injectors before replacing the new pump again

How about testing the voltage near the pump, with the pump running--to assure it's not starving for electrical power?

When you installed the "new" pump, did you also install an in-tank wire harness? They're known for corrosion.

swapping the injectors is not going to increase the fuel pressure when the fuel pump creates the pressure.

Agreed.

 

[travis mattson]

How about testing the voltage near the pump, with the pump running--to assure it's not starving for electrical power?

When you installed the "new" pump, did you also install an in-tank wire harness? They're known for corrosion.


Agreed.

I put new standard ignition injectors in and upstream 02s and runs great, no check engine light. Awesome power and throttle response.

 

[travis mattson]

I put new standard ignition injectors in and upstream 02s and runs great, no check engine light. Awesome power and throttle response.

I did also put a new fuel filter last weekend when this came about, it did have the old **** poppet injectors in still. Basically crumbled apart when I took them out

 

[travis mattson]

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[thegawd]

right on! so you got er running but you also know that the fuel pressure is low.... get that fixed and I bet your truck will act like a new truck with tonnes of power!

that happened to me twice, once when I first redid the fuel system on the burb and then again when I put a new break booster in. it's a great feeling to feel that power restored!

CHEERS!

Al