Fuel pressure??

[Buttons]

What kind of fuel pressure should i be getting?
The guage on my regulator reads 3psi when ignition is on and pump is running, BUT when the engine is running it drops to 0psi!!

The motor is popping and banging when revved, hence the reason i looked at fuel pressue.

Any ideas?

(2276 IDA'd with Holley fuel pump if that helps!)

[SteveW]

Well with my limited knowledge I'd say you have a problem with the holley fuel pump or its a problem somewhere else causing the pressure to drop (short circuit maybe?) IDA's need a constant 3 to 3.5 PSI fuel pressure..

[Bruce]

Try a different gauge.  If your car continues to run with 0psi, the gauge isn't right.

[Jim Ratto]

again, if it is liquid filled when engine compartment gets hot, it will show inaccurate reading. I had a liquid filled gauge make me chase my tail for a few months back in mid 90's....  drive car, gauge showed under 1psi, cranked reg up to show 3psi, carbs flooded, burbled, ran like shit.

[Bruce]

..., carbs flooded, burbled, ran like shit.

I had that problem recently and the gauge said the pressure was good.  So I tried another gauge.  It agreed with the first.  But it still flooded.  A third gauge confirmed the first two were duds.
Those small gauges everyone uses are junk, and they get shook to death.

[Jim Ratto]

..., carbs flooded, burbled, ran like shit.

I had that problem recently and the gauge said the pressure was good.  So I tried another gauge.  It agreed with the first.  But it still flooded.  A third gauge confirmed the first two were duds.
Those small gauges everyone uses are junk, and they get shook to death.

I agree. I am going to eventually need another...
What i want to do is just buy a real diagnosis type pressure checking gauge, then plug hole in tee.

[Harry/FDK]

..., carbs flooded, burbled, ran like shit.

I had that problem recently and the gauge said the pressure was good.  So I tried another gauge.  It agreed with the first.  But it still flooded.  A third gauge confirmed the first two were duds.
Those small gauges everyone uses are junk, and they get shook to death.

I agree. I am going to eventually need another...
What i want to do is just buy a real diagnosis type pressure checking gauge, then plug hole in tee.

 

[69Stu]

Have you tried adjusting the fuel with the engine running?

[Buttons]

No... you mean adjust the regulator whilst it's ticking over??? that sounds pretty logical......... thanx

[John Rayburn]

Sounds like your pump has something stuck in the bypass. Run the engine, and smack the pump around with a wrench or something, it'll probably dislodge. Good luck.