Why does fuel pressure bleed off when I turn the key off?
An expert who has achieved level 1. An expert that has 1 follower. Re: fuel pressure bleeds off when i turn the key off . is… Once car is stared and you shut it off it starts right up but if you let it set for three min. or maybe longer its hard to start it has new fuel pump pressure reg new fuel filter plugs wires can some one help me
What should the fuel pressure be on a GM 4.3L?
This is where you’ll connect your fuel pressure gauge (the first photo, in the image viewer, is of a 4.3L, and the second of the V8 engine). NOTE: In case you’re wondering, the factory manual specifies that the fuel pressure for the CSFI system should be between 56-62 PSI. The CPI system’s fuel pressure should be between 60-66 PSI.
What should fuel pressure be in a truck?
Fuel pressure test when cold, turn key on and spikes to almost 60psi, then quickly drops to about 10psi, but truck still starts ok. Holds pressure around 52psi. Turn key off and pressure drops rapidly. When motor hot, turn key on and climbs slowly mid 50s, then falls back down. Long crank and need to pump pedal to catch.
How to check for fuel leaks in a GM 4.3L?
Once the fuel pressure gauge registers pressure, check for fuel leaks around the Schrader valve. It’s very important that NO fuel leaks are present for the accuracy of the test. Once you have verified no fuel leaks, continue to the next step. Have your assistant crank the engine as you eyeball the fuel pressure gauge.
An expert who has achieved level 1. An expert that has 1 follower. Re: fuel pressure bleeds off when i turn the key off . is… Once car is stared and you shut it off it starts right up but if you let it set for three min. or maybe longer its hard to start it has new fuel pump pressure reg new fuel filter plugs wires can some one help me
What should fuel pressure be on a cold start?
On a cold start it wants to keep turning over even after I stop holding the key in the ignition position. Ive had a lot of experience with the 4.3 on previous vehicles I owned and they need at least 58 psi to start. Early versions of the injectors were prone with sticking poppets and leaking regulators.
This is where you’ll connect your fuel pressure gauge (the first photo, in the image viewer, is of a 4.3L, and the second of the V8 engine). NOTE: In case you’re wondering, the factory manual specifies that the fuel pressure for the CSFI system should be between 56-62 PSI. The CPI system’s fuel pressure should be between 60-66 PSI.
When do I lose fuel pressure on my Silverado?
I have a 2005 Chevy Silverado 1500 and I lose pressure gradually when I shut off the engine. When I go back to start it within an hour I cant get it to fire unless its turned over several times and I hit the gas. Ive replaced the fuel pressure regulator and ICV. No codes whats so ever.
When does fuel pressure drop after turning off the engine?
Turn the engine off, but key on and pressure gradually drops all the way to 18 PSI over 20 minutes. Turn the key off then key on but no engine start, I can hear the 2 second fuel prime and the PSI shoots up to 55 PSI and engine still has to turn over for 3 or 4 seconds without gas pedal, 1 or 2 seconds with gas pedal.
How do you get zero residual fuel pressure?
Zero residual fuel pressure on the fuel system. Turn key to “on” and I get about 8 psi for 2 seconds (indicating the pump turned on) but then it bleeds to zero immediately as the pump shuts off. I wait 10 seconds and repeat the procedure but no pressure is retained in the fuel system.
I have a 2005 Chevy Silverado 1500 and I lose pressure gradually when I shut off the engine. When I go back to start it within an hour I cant get it to fire unless its turned over several times and I hit the gas. Ive replaced the fuel pressure regulator and ICV. No codes whats so ever.
Turn the engine off, but key on and pressure gradually drops all the way to 18 PSI over 20 minutes. Turn the key off then key on but no engine start, I can hear the 2 second fuel prime and the PSI shoots up to 55 PSI and engine still has to turn over for 3 or 4 seconds without gas pedal, 1 or 2 seconds with gas pedal.
Fuel pressure test when cold, turn key on and spikes to almost 60psi, then quickly drops to about 10psi, but truck still starts ok. Holds pressure around 52psi. Turn key off and pressure drops rapidly. When motor hot, turn key on and climbs slowly mid 50s, then falls back down. Long crank and need to pump pedal to catch.
On a cold start it wants to keep turning over even after I stop holding the key in the ignition position. Ive had a lot of experience with the 4.3 on previous vehicles I owned and they need at least 58 psi to start. Early versions of the injectors were prone with sticking poppets and leaking regulators.