What should fuel pressure be on a carbureted engine?
between 6 and 8 psi
Setting Fuel Pressure Your system’s fuel pressure should be generally set between 6 and 8 psi (measured at the carburetor) for a street engine (higher for a race engine). Keep in mind that fuel pressure is not fuel volume.
How do I know if my fuel pressure is too high?
Symptoms of High Fuel Pressure
- Check engine light.
- The exhaust gives off fuel smell.
- Low fuel economy and constant refuelling.
- Poor engine performance.
- Blackened spark plugs.
- Spark plugs that are wet with fuel.
- Restrictions in return line.
When did Ford fuel inject the 460?
In 1988, the 7.5L mill took a major step forward in terms of performance thanks to the introduction of fuel injection, which saw both horsepower (245) and torque (400 lb-ft) peak in the modern era by the 1990s.
Is the Ford 460 engine good?
Overall, Ford’s 7.5L 460 engine is extremely reliable. As is with any 25+ year old engine the majority of the problems associated with it today are from old age and high mileage. The block and major engine components themselves can easily withstand in excess of 300,000 miles.
Can backpressure screw up a Ford fuel pump?
I have read that Ford pumps do not like backpressure and that backpressure can screw them up. Very interesting. From what I have gathered so far it seems that fuel pressure should increase rather than decrease as revs build.
What should the fuel pressure be under heavy acceleration?
Fuel pressure should increase from approx 30psi to 39psi under heavy acceleration (loss of vac on the regulator). If the pressure goes down wnder WOT, then there is not enough supply due to pinched fuel line, plugged filter, or weak pump.
How to check fuel pressure while idling?
Put a pressure gauge on the rail and it shows 30 while idling. Take it for a spin down the road and the higher I rev the engine the more the fuel pressure drops, down into the low 20’s. I plugged the return to the tank to try to determine if it was a bad regulator or the pump.
Why does the fuel pressure go down with a new fuel filter?
If the pressure goes down wnder WOT, then there is not enough supply due to pinched fuel line, plugged filter, or weak pump. Since both tanks seem to have the same problem, I’d check the lines very closely, and double check the new filter, but its likely the pump (s).