Engine Surging?

[D-Mont]

I will try to explain my problem as best i can...

I have an 87 K5 it has the 350 and EFI first it seem to loose power a bit then shortly after the engine died. I managed to limp it home by vigorously pumping the gas pedal with the motor surging sort of, it ran like it was getting just a splash of gas then almost die and get a splash of gas again while the whole time i am have to vigorously pump the pedal.
It will start but dies instantly unless you the vigorous pedal pumping.

Anyone have ideas on what the problem could be?

 

[D-Mont]

No one? Anybody have any idea whatsoever?

 

[4xcrazy]

check fuel pressure

 

[rebelgregory]

check fuel pressure

This. You'll need to get the pressure gauge and then the little adapter to hook in-line since there's no schrader valves on these fuel lines.

But those are classic signs of a bad fuel pump or torn rubber hose on the discharge of the pump (in the tank).

 

[crazedyak]

I recently had a situation where a ground cable that was moving around got exposed to enough heat to melt a small section of the insulation. As the wire was bouncing around it would randomly hit the frame and shut the fuel pump off.

 

[D-Mont]

Thanks for the replies!

Fuel pump is my thought also. i was just hoping since i can get it to run somewhat that it would be something else.

 

[bigred88]

The only other thing that comes to mind is one heck of a vacuum leak, but you should hear an audible whistle if that's the case. But I would side with most likely a fuel pump.

 

[4xcrazy]

I have never really heard a surging idle with the TBI setup, it usually raises the idle up higher when it does. I know the carb'd engines will surge though.

Just my experience though.

 

[jamber2541]

Had a similar issue, turned out to be the tps and no code