Fuel Delivery Help!
Thread Starter
|
1st Gear
Joined: Aug 2024
Posts: 1
Likes: 0
Fuel Delivery Help!
I have a 90 F150 with the 300. EFI.
Just had a problem out of the blue pop up. Truck won't start like it normally has. It's like I have to cycle the key 10-15 times to "prime" or "pressurize" the system. When it does start, there is almost no power.
Pressure regulator? Relay? Fuel Pump? I can hear it kick on and it sounds like it always has. Beyond that I am clueless.
I inherited this truck from my grandfather about 6 months ago and just started messing around with it. Haven't owned anything this old so my knowledge is lacking for sure.
Thanks in advance for any insight or advice!
Just had a problem out of the blue pop up. Truck won't start like it normally has. It's like I have to cycle the key 10-15 times to "prime" or "pressurize" the system. When it does start, there is almost no power.
Pressure regulator? Relay? Fuel Pump? I can hear it kick on and it sounds like it always has. Beyond that I am clueless.
I inherited this truck from my grandfather about 6 months ago and just started messing around with it. Haven't owned anything this old so my knowledge is lacking for sure.
Thanks in advance for any insight or advice!
Logistics Pro
Joined: Nov 2013
Posts: 3,922
Likes: 1,192
From: Mojave, Ca
I have a 90 F150 with the 300. EFI.
Just had a problem out of the blue pop up. Truck won't start like it normally has. It's like I have to cycle the key 10-15 times to "prime" or "pressurize" the system. When it does start, there is almost no power.
Pressure regulator? Relay? Fuel Pump? I can hear it kick on and it sounds like it always has. Beyond that I am clueless.
I inherited this truck from my grandfather about 6 months ago and just started messing around with it. Haven't owned anything this old so my knowledge is lacking for sure.
Thanks in advance for any insight or advice!
Just had a problem out of the blue pop up. Truck won't start like it normally has. It's like I have to cycle the key 10-15 times to "prime" or "pressurize" the system. When it does start, there is almost no power.
Pressure regulator? Relay? Fuel Pump? I can hear it kick on and it sounds like it always has. Beyond that I am clueless.
I inherited this truck from my grandfather about 6 months ago and just started messing around with it. Haven't owned anything this old so my knowledge is lacking for sure.
Thanks in advance for any insight or advice!
FTE Legend
Joined: Nov 2015
Posts: 30,876
Likes: 4,115
From: Angier, NC
X2 what he said.
On the fuel rail there should be a port, may have a cap on it, that has a valve that looks like a tire valve.
You can rent the EFI fuel PSI gauge from the parts stores or buy one at HF with the adapters so you have it in your tool box.
When you turn on the key the pump should run for a few seconds to prime the system. It should hold the PSI after the pump stops.
There is also a fuel psi regulator that has a vacuum line going to it. Remove the hose and check if it is wet, it should not be wet.
Also when running and you remove the hose the PSI should go up.
Sorry to say I am not really up on the EFI systems so I dont know when the PSI spec should be.
Dave ----
Mountain Pass
Joined: Mar 2008
Posts: 165
Likes: 38
From: SW GA
Welcome to FTE
X2 what he said.
On the fuel rail there should be a port, may have a cap on it, that has a valve that looks like a tire valve.
You can rent the EFI fuel PSI gauge from the parts stores or buy one at HF with the adapters so you have it in your tool box.
When you turn on the key the pump should run for a few seconds to prime the system. It should hold the PSI after the pump stops.
There is also a fuel psi regulator that has a vacuum line going to it. Remove the hose and check if it is wet, it should not be wet.
Also when running and you remove the hose the PSI should go up.
Sorry to say I am not really up on the EFI systems so I dont know when the PSI spec should be.
Dave ----
X2 what he said.
On the fuel rail there should be a port, may have a cap on it, that has a valve that looks like a tire valve.
You can rent the EFI fuel PSI gauge from the parts stores or buy one at HF with the adapters so you have it in your tool box.
When you turn on the key the pump should run for a few seconds to prime the system. It should hold the PSI after the pump stops.
There is also a fuel psi regulator that has a vacuum line going to it. Remove the hose and check if it is wet, it should not be wet.
Also when running and you remove the hose the PSI should go up.
Sorry to say I am not really up on the EFI systems so I dont know when the PSI spec should be.
Dave ----
Thread
Thread Starter
Forum
Replies
Last Post
Bikedude987
1987 - 1996 F150 & Larger F-Series Trucks
1
May 10, 2012 10:21 PM
BW Tibbetts
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
1
Apr 28, 2004 08:47 AM
