Skip the auto shop - Our mechanics make house calls

Q: 2005 F250 5.4L Gas Will Not Start-HELP Please!

asked by on

2005 F250 5.4L Gas Will Not Start-HELP Please!

Ok full story. I was having problems with the starter 2 weeks ago. Also put in a NEW Battery. Changed the starter and it was still draggy/slow to start and wouldn't start when hot. Tracked it down to a loose engine ground. Removed, cleaned and retightened. Ran great for about a week. No Problems starting. About a week after changing the starter, started the truck after it was warm and sat for about 20 minutes. Starter stayed engaged after the truck started. I turned it off and turned the key back to the RUN position, not the START position and it was turning the engine over and started. I did this 2 or 3 times and then the starter disengaged and the truck ran. No problems for 2 days. Now it will not start. I replaced the starter again. Checked the battery. Checked all of the fuses several times. Swapped out relays several times. Replaced the ignition switch (under the steering wheel). Swapped out the ignition cylinder. Tested the starter off the truck. Re-installed starter. Jumped across starter terminals and starter engages and engine turns over. All lights work with no dimming. Will not start in Park or Neutral. Reverse lights come on in reverse. Turn the key to Run position and all dash lights come on normal. Turn key to Start position and relay under dash and relay under hood click. Lights do not dim and NOTHING. Starter circuit doesn't engage the starter or even try. The same result in Park, Reverse, Neutral, and Drive. Same lights and relays in all shift positions but the starter does NOTHING.

What am I missing ??????? I hope someone knowledgeable will have some suggestions, ideas, questions. . . . THANKS for any help! -Kenny

My car has 100000 miles.
My car has an automatic transmission.

A: It sounds like you may be having an issue w...

It sounds like you may be having an issue with the starter solenoid or the starter relay. The relay is overload protected, so if the system is trying to pull too much amperage, it will shut down. Also, if the solenoid has failed, it will not send the signal to the starter to engage the motor. There will need to be some diagnostic tests performed to verify that the system is operating within specifications. If you need help identifying and repairing the issue, YourMechanic offers several options. They have trained mechanics that can come to your home or office to diagnose the starting problem so that the correct repair can be made.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Bad wheel bearing at front of car.

A grinding noise would indicate that the brake may be worn out. Have a technician look at it to determine if the brakes are worn out or the wheel bearing is bad. A bad wheel bearing would be a whining...

Q: Jeep won't start - only clicks

Q: Car will crank but won't start - 2006 Ford Taurus

Since you did all this work then you should be able to check the fuel pressure and engine for spark getting to the spark plugs. If you have spark and fuel pressure, then you will need to check the fuel...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...