Fuel pressure dropping off
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Fuel pressure dropping off
Can anyone help. The fuel pressure drops after 10-15mins of driving from 41psi to 18psi. Got battery voltage at pump. I've fitted another Bosch 023 pump. Fitted new fuel filter
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Unable to accelerate. Only way to drive is to just rest foot on accelerator. If you lift off fuel pressure increase but as soon as put foot on peddle pressure drops.
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I've undone the fuel filler cap when it's happening and it's not a breather problem.
It's a track day car with fuel lines inside. I've put a fuel pressure gauge in the feed pipe at the fuel rail and it's not a blockage in the feed pipe. It's happening when you put your foot on the accelerator and you get that anitial vacuum in the inlet
It's a track day car with fuel lines inside. I've put a fuel pressure gauge in the feed pipe at the fuel rail and it's not a blockage in the feed pipe. It's happening when you put your foot on the accelerator and you get that anitial vacuum in the inlet
#14
Initially you said this problem happened after 10-15 mins of driving.
Now you're saying it happens only when you put your foot on the accelerator ? So is it a momentary loss of pressure or a constant loss of pressure ?
Details seem to be misleading.
Now you're saying it happens only when you put your foot on the accelerator ? So is it a momentary loss of pressure or a constant loss of pressure ?
Details seem to be misleading.
#16
Fuel pressure should track manifold pressure. Are you saying this never happens ?
If you test the reg and apply pressure, does fuel pressure do what it's supposed to do ?
ie fairly closely 1:1 track manifold pressure
If you test the reg and apply pressure, does fuel pressure do what it's supposed to do ?
ie fairly closely 1:1 track manifold pressure
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So I pulled a vacuum on the fuel pressure regulator and the fuel pressure dropped to 41 psi, and then put a pressure of 14psi and the fuel pressure went up to 61psi
#23
You're going to need to do some proper testing.
Monitor both pump voltage and current draw, as close to the pump as possible. This will at least give some clues as to how hard the pump is working and whether the power supply is holding up during this problem.
And also while monitoring pressure as close to the reg as possible
or you could just change the reg...as it seems about the only major item you have not changed ?
Has the problem just happened suddenly, or what ?
Monitor both pump voltage and current draw, as close to the pump as possible. This will at least give some clues as to how hard the pump is working and whether the power supply is holding up during this problem.
And also while monitoring pressure as close to the reg as possible
or you could just change the reg...as it seems about the only major item you have not changed ?
Has the problem just happened suddenly, or what ?
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