Rapidly fluctuating fuel pressure at idle

[isnms]

It's a friends 99 Blazer.
At idle the fuel pressure fluctuates rapidly 51-53psi.
Slowly applying throttle the rpm will climb smoothly.
Rapidly applying throttle it bogs down and back fire.
Vacuum is 19inhg.

 

[shaeff]

Fuel filter?

When the filter on my Supra was incredibly clogged (damn spiders made a nest in it overnight! - that's the last time I ever leave the lines uncovered!)- the fuel pressure would fluctuate at idle, but stall the car as soon as you pressed on the accelerator pedal. It was drivable, but barely.

 

[isnms]

Sounds like a good possibility. Thanks.

 

[shaeff]

No problem, let me know how it turns out.

 

[isnms]

They replaced the pump and filter. Runs good now.

 

[shaeff]

Sweet!