5.4 hard start
Thread Starter
|
Junior User
Joined: Jul 2006
Posts: 53
Likes: 0
From: Lapeer, Michigan
5.4 hard start
Happy New Year FTE's!
I have 99' f-250 SD 5.4 automatic 4WD.
Out of the blue last week I started having starting problems.
Usually I just turn the key and it fires right up. Now I have to hold the gas pedal down half way to get it to go. If I miss the start the first time, I have to wait a few minutes to get it to start. Otherwise it'll just crank and crank. It doesn't matter if the engine is warm or cold.
Once it starts, it idle's and runs perfectly.
I did some searching and sounds like the IAC valve could be bad? Sounded like most people with IAC problems had idle problems as well.
Thoughts? Any other possiblity's?
I have 99' f-250 SD 5.4 automatic 4WD.
Out of the blue last week I started having starting problems.
Usually I just turn the key and it fires right up. Now I have to hold the gas pedal down half way to get it to go. If I miss the start the first time, I have to wait a few minutes to get it to start. Otherwise it'll just crank and crank. It doesn't matter if the engine is warm or cold.
Once it starts, it idle's and runs perfectly.
I did some searching and sounds like the IAC valve could be bad? Sounded like most people with IAC problems had idle problems as well.
Thoughts? Any other possiblity's?
Posting Guru
Joined: Sep 2011
Posts: 1,076
Likes: 0
From: Mt. Holly Springs, PA
make sure the easy stuff is good, (Batt, Batt cables, and such) and if you checked it post that with your question, Because those of us who have diagnosed this fault for years; this is the first things we check, and you would be surprised how many times something simple is the case.
Thread Starter
|
Junior User
Joined: Jul 2006
Posts: 53
Likes: 0
From: Lapeer, Michigan
forgot to mention....
PA -, New battery & cables spring of 2011. She cranks like new.
She just won't fire without some additional fuel. Or if it does start, (without the additional fuel) it's just for a second or two then stalls out...... Then I have to wait a few minutes to get her to go again.
My truck is a weekend driver. I do have an ever increasing hole in the muffler (that will be replaced soon). Could lack of back pressure be a cause?? Just Curious.....
Is there a way to check the IAC valve? Or just replace it and hope....?
Thanks for your help!! It's always appreciated!!
She just won't fire without some additional fuel. Or if it does start, (without the additional fuel) it's just for a second or two then stalls out...... Then I have to wait a few minutes to get her to go again.
My truck is a weekend driver. I do have an ever increasing hole in the muffler (that will be replaced soon). Could lack of back pressure be a cause?? Just Curious.....
Is there a way to check the IAC valve? Or just replace it and hope....?
Thanks for your help!! It's always appreciated!!
Posting Guru
Joined: Sep 2011
Posts: 1,076
Likes: 0
From: Mt. Holly Springs, PA
PA -, New battery & cables spring of 2011. She cranks like new.
She just won't fire without some additional fuel. Or if it does start, (without the additional fuel) it's just for a second or two then stalls out...... Then I have to wait a few minutes to get her to go again.
My truck is a weekend driver. I do have an ever increasing hole in the muffler (that will be replaced soon). Could lack of back pressure be a cause?? Just Curious.....
Is there a way to check the IAC valve? Or just replace it and hope....?
Thanks for your help!! It's always appreciated!!
She just won't fire without some additional fuel. Or if it does start, (without the additional fuel) it's just for a second or two then stalls out...... Then I have to wait a few minutes to get her to go again.
My truck is a weekend driver. I do have an ever increasing hole in the muffler (that will be replaced soon). Could lack of back pressure be a cause?? Just Curious.....
Is there a way to check the IAC valve? Or just replace it and hope....?
Thanks for your help!! It's always appreciated!!
No the muffler would not make the truck act like this. It can be anyone of a hundred things. I would just keep bumping this message from time to time untill someone that has had your problem can answer.
I would never advocate throwing parts at a problem...
Posting Guru
Joined: Sep 2011
Posts: 1,076
Likes: 0
From: Mt. Holly Springs, PA
Emission System - Idle Air Control Motor Testing & Replacing - 1 of 2 - YouTube
give this a look-see
give this a look-see
New User
Joined: Sep 2011
Posts: 17
Likes: 0
SteveO,
My 99 F250 V10 is doing the same thing. Usually tries to start and then quits. Cranks over well, but does not start. If I cycle the key a few times it will start (sometimes), but lately it has gotten worse and takes several key cycles. Seems to work okay when warmer weather, but it's getting colder here in the northeast. Keep looking as I will. If you find the cause please share with me and I'll do the same.
My 99 F250 V10 is doing the same thing. Usually tries to start and then quits. Cranks over well, but does not start. If I cycle the key a few times it will start (sometimes), but lately it has gotten worse and takes several key cycles. Seems to work okay when warmer weather, but it's getting colder here in the northeast. Keep looking as I will. If you find the cause please share with me and I'll do the same.
Trending Topics
Laughing Gas
Joined: Feb 2011
Posts: 991
Likes: 6
From: Newberry Springs, CA
Sounds like exactly what my truck was doing right before the fuel pump went Tango Uniform.
Check your fuel pressure.
Check your fuel pressure.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Posting Guru
Joined: Sep 2011
Posts: 1,076
Likes: 0
From: Mt. Holly Springs, PA
SteveO,
My 99 F250 V10 is doing the same thing. Usually tries to start and then quits. Cranks over well, but does not start. If I cycle the key a few times it will start (sometimes), but lately it has gotten worse and takes several key cycles. Seems to work okay when warmer weather, but it's getting colder here in the northeast. Keep looking as I will. If you find the cause please share with me and I'll do the same.
My 99 F250 V10 is doing the same thing. Usually tries to start and then quits. Cranks over well, but does not start. If I cycle the key a few times it will start (sometimes), but lately it has gotten worse and takes several key cycles. Seems to work okay when warmer weather, but it's getting colder here in the northeast. Keep looking as I will. If you find the cause please share with me and I'll do the same.
Hope this helps
Lead Driver
Joined: Nov 2008
Posts: 8,449
Likes: 70
From: South Jersey
first check the fuel pressure, then clean your IAC most of the time its the IAC is dirty. BUT sometimes cleaning the IAC doesnt fix the problem, ask me how i know. A new IAC solved my starting problem
Thread
Thread Starter
Forum
Replies
Last Post
