Why does my fuel pump run at 43 psi?
With Ignition ON, fuel pump runs for @ 5 seconds at 43 PSI and then shut down automatically. This will allow fuel pressure to build in the line minimizing hard starting problem. You are correct in your search, Scotty. Loss of fuel pressure may be due to faulty check valve (in pump assembly) or Fuel Pressure Regulator-Fuel Injector.
What should the fuel pressure be at idle?
Fuel pressure gauge indicates that the fuel pump is providing 35psi at idle and throtlling up gives it another 6psi or so. With the ignition off the fuel pressure immediately slowly drops and after a couple of hours it’s down to about 15psi.
What to do when your fuel pressure goes down?
To check if the problem is with the check valve, pinch the line downstream of the fuel pressure gauge (between fuel filter and fuel rail). If the pressure goes down immediately after pump shuts down, problem with check valve.
When do you need to check fuel pressure?
Many times when confronted with a no start or performance problem you need to check fuel pressure. This is a helpful guide on how to go about that process. Many times a fuel pressure gauge can be rented from your local auto parts store or tool rental outlet. If you went to purchase a gauge they vary in price greatly.
What’s the fuel pressure on a Nissan Leaf?
Now the pressure begins to build, but only 5-10 PSI. After 5 or 6 key ON’s, it finally gets to 43 PSI and holds steady. Now I release the grips to un-pinch the line and the pressure drops fairly quickly, back to 0-2 PSI within a couple of minutes max.
What should fuel pressure be when engine is off?
Observe the fuel pressure gauge while the engine runs and after shutting off the engine. Fuel pressure should hold to specs, while the engine is running, and after turning off the engine. With the engine off, pressure should hold for about 5 minutes. If necessary, consult your repair manual.
What to do when you lose fuel pressure?
As a ‘patch’ to your fuel pressure loss, turn Ignition to ON for @ 3-5 seconds then START. With Ignition ON, fuel pump runs for @ 5 seconds at 43 PSI and then shut down automatically. This will allow fuel pressure to build in the line minimizing hard starting problem. You are correct in your search, Scotty.
What happens when the fuel pump goes out on a Nissan Pathfinder?
There are physical signs that you can feel when your Pathfinder’s fuel pump is going out. Before taking anything apart, check to see if your engine’s computer has any trouble codes saved in it. The engine may throw a P0087 trouble code. This trouble code detects that the fuel rail/system pressure is too low.
How can I tell if my Pathfinder fuel filter is bad?
There are physical signs that you can feel when your Pathfinder’s fuel filter is clogging. Before taking anything apart, check to see if your engines computer has any trouble codes saved in it. The engine may throw a P0087 trouble code. This trouble code detects that the fuel rail/system pressure is too low.
Why does my Nissan Pathfinder not start up?
If the fuel filter has become so contaminated that the minimum amount of fuel has not been let through it, the engine won’t start at all. At the most basic of levels your Nissan Pathfinder needs three things to start: Air, fuel, and spark. If any of these things aren’t present, the engine won’t turn over at all.
With Ignition ON, fuel pump runs for @ 5 seconds at 43 PSI and then shut down automatically. This will allow fuel pressure to build in the line minimizing hard starting problem. You are correct in your search, Scotty. Loss of fuel pressure may be due to faulty check valve (in pump assembly) or Fuel Pressure Regulator-Fuel Injector.
How much fuel pressure should I be getting?
Since I may npt have enough pressure running to my injectors to get gas to start my car! Please help! Thanks For cars without direct injection, it should be ~40 lbs pressure at the fuel rail. Is that with car turning over?
Since I may npt have enough pressure running to my injectors to get gas to start my car! Please help! Thanks For cars without direct injection, it should be ~40 lbs pressure at the fuel rail. Is that with car turning over?
To check if the problem is with the check valve, pinch the line downstream of the fuel pressure gauge (between fuel filter and fuel rail). If the pressure goes down immediately after pump shuts down, problem with check valve.
Now the pressure begins to build, but only 5-10 PSI. After 5 or 6 key ON’s, it finally gets to 43 PSI and holds steady. Now I release the grips to un-pinch the line and the pressure drops fairly quickly, back to 0-2 PSI within a couple of minutes max.
Why does my fuel pressure go down when I idle?
Fuel pressure gauge indicates that the fuel pump is providing 35psi at idle and throtlling up gives it another 6psi or so. With the ignition off the fuel pressure immediately slowly drops and after a couple of hours it’s down to about 15psi. By the information I’ve read I concluded that it could be a check valve failure or an injector leaking.
As a ‘patch’ to your fuel pressure loss, turn Ignition to ON for @ 3-5 seconds then START. With Ignition ON, fuel pump runs for @ 5 seconds at 43 PSI and then shut down automatically. This will allow fuel pressure to build in the line minimizing hard starting problem. You are correct in your search, Scotty.
Can a low pressure fuel system cause spark plugs to wear out?
A low-pressure fuel system will destroy the spark plugs that ignite the fuel in an engine’s cylinder. If by chance you are replacing them and you find they are worn out before their time, you might be looking at a problem with your fuel system.
Is there a Nissan Maxima Club of America?
The club for Nissan Maxima and Infiniti I30 / I35 owners, and the official home of Maxima Club of America! Hello All. I’ve got a 98 I30 with a starting problem.