5.4 engine cranks, won't fire........
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5th Wheeling
Joined: Jun 2013
Posts: 26
Likes: 0
5.4 engine cranks, won't fire........
2005......125K miles
If it sits for a week, it won't fire unless I turn key on and off 2 or 3 times...
I have been living with this until yesterday. Now it can have the same symptoms after sitting 1 hour. It usually runs fine once it starts, but occasionally it will falter and run rough for a while....
A breakdown on the road would be ugly....
Needing your thoughts and what worst case scenario can be........
Thanks.
If it sits for a week, it won't fire unless I turn key on and off 2 or 3 times...
I have been living with this until yesterday. Now it can have the same symptoms after sitting 1 hour. It usually runs fine once it starts, but occasionally it will falter and run rough for a while....
A breakdown on the road would be ugly....
Needing your thoughts and what worst case scenario can be........
Thanks.
Lead Driver
Joined: Nov 2012
Posts: 8,304
Likes: 28
From: Salem, VA
I have to second this. The easiest way to test it is just turn the key to the "ON" position and listen for the pump to pressurize the line. If it's not humming and you're having to "bump" it 2-3 times to get it to go that could be it. We need a little more info to really help though. Does it crank and not fire? Does it fire but not crank reliably? The first step is to determine if it’s a spark, fuel, or compression problem.
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5th Wheeling
Joined: Jun 2013
Posts: 26
Likes: 0
Well.........
I put it off and it finally let me down.
The old girl won't start now.
Having it towed to the dealer today for a fuel pump install.....
Luckily, the fuel level is low..........that 44 gallon tank would be a devil to handle.
I put it off and it finally let me down.
The old girl won't start now.
Having it towed to the dealer today for a fuel pump install.....
Luckily, the fuel level is low..........that 44 gallon tank would be a devil to handle.
More Turbo
Joined: Jan 2014
Posts: 722
Likes: 13
From: ramsey mn
Kick or pound the tank with a rubber mallet you will get them to start one more time done it a bunch of time in different vehicles. A friends wife drove her explorer around kicking the tank when it wouldn't start for two weeks until he had the money to get a pump
Junior User
Joined: Jan 2013
Posts: 68
Likes: 0
From: Central TX
On my 5.4 (f-150) the wires to the fuel pump fuse had issues going into the fuse box on the fender under the hood. If i pushed on fuse sometimes it would start, relay was good. Rewired with inline fuse.
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