Rough idle till warm
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5th Wheeling
Joined: Oct 2023
Posts: 38
Likes: 2
Rough idle till warm
Well my 1999 just got it running in who knows how long has a really hard time starting it’s 70 outside when It does it starts for a second idles up to 1k rpm’s then dies I have to put my foot to the floor for it not to die when it starts then with my foot still to the floor it just sits there and lopes for a while sounds not great then as it starts to warm up I can watch my rpm’s slowly rise up from 500 rpm’s slowly to 1k then past 1k rpm’s I let off the throttle and it dies so I start to back and the throttle works again but will still die if I let off so I hold it around 1.5k for a minute or two then it’s fine and idles great had this problem for 3 days in a row now , I have a small fuel leak that’s coming from the fuel bowl drain hose any help appreciated thanks
Cargo Master
Joined: Apr 2012
Posts: 2,024
Likes: 525
From: Bottom Of Pikes Peak
I feel like we just had a similar thread start on this.
I've had a similar experience but that was many years ago and i do not remember all the details or fix. I want to say this is a case of the romps or whatever they used to call it.
right off the top of my head, I can't think of what it is.
even though it's 70 deg, you should test the glow plug relay and glowplugs.
Do you have a chip or any upgrades/ mods done? you may have to have a way to read your system...forescan/ auto engenuity, etc. we need to be able to see whats going on.
you may want to search hard start threads or romps on various forums as well
I've had a similar experience but that was many years ago and i do not remember all the details or fix. I want to say this is a case of the romps or whatever they used to call it.
right off the top of my head, I can't think of what it is.
even though it's 70 deg, you should test the glow plug relay and glowplugs.
Do you have a chip or any upgrades/ mods done? you may have to have a way to read your system...forescan/ auto engenuity, etc. we need to be able to see whats going on.
you may want to search hard start threads or romps on various forums as well
Thread Starter
|
5th Wheeling
Joined: Oct 2023
Posts: 38
Likes: 2
I feel like we just had a similar thread start on this.
I've had a similar experience but that was many years ago and i do not remember all the details or fix. I want to say this is a case of the romps or whatever they used to call it.
right off the top of my head, I can't think of what it is.
even though it's 70 deg, you should test the glow plug relay and glowplugs.
Do you have a chip or any upgrades/ mods done? you may have to have a way to read your system...forescan/ auto engenuity, etc. we need to be able to see whats going on.
you may want to search hard start threads or romps on various forums as well
I've had a similar experience but that was many years ago and i do not remember all the details or fix. I want to say this is a case of the romps or whatever they used to call it.
right off the top of my head, I can't think of what it is.
even though it's 70 deg, you should test the glow plug relay and glowplugs.
Do you have a chip or any upgrades/ mods done? you may have to have a way to read your system...forescan/ auto engenuity, etc. we need to be able to see whats going on.
you may want to search hard start threads or romps on various forums as well
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Yeah we need to see what's happening with ICP, IPR DC%,EOT, IAT, MAP, EBP, BARO, FIPW, APP, and Idle validation. Knowing the fuel pressure never hurts either. What's the fuel level, Hutch mod already done? You said it's not run for quite a while what's the story there? Could have some connecting threads.
Thread Starter
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5th Wheeling
Joined: Oct 2023
Posts: 38
Likes: 2
Yeah we need to see what's happening with ICP, IPR DC%,EOT, IAT, MAP, EBP, BARO, FIPW, APP, and Idle validation. Knowing the fuel pressure never hurts either. What's the fuel level, Hutch mod already done? You said it's not run for quite a while what's the story there? Could have some connecting threads.
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Here's a write up from the tech section showing what and how the Hutch mod is done. The second link shows how to rig up a test gauge for fuel pressure. A simple check to find out if you do have air in fuel problems is to hook a hose to the drain valve and point it into a bucket. the cycle the key and see what comes out. Did you put fresh fuel in the tank and change all the filters? With the lack of history on the truck that would be a priority. The 2 most important things to keeping these engines alive is regular oil changes w/ approved oil and clean fuel at the correct pressure.
https://www.ford-trucks.com/forums/1...l#post19216921
https://www.ford-trucks.com/forums/a...4&d=1592859516
https://www.ford-trucks.com/forums/1...l#post19216921
https://www.ford-trucks.com/forums/a...4&d=1592859516
Thread Starter
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5th Wheeling
Joined: Oct 2023
Posts: 38
Likes: 2
This is after I got it to idle good I just realized that you probably needed it while it was in the problem sorry
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Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Actually the best method is to save the file. Then you can load it here and we can go over it line by line, or when you get really fancy there is a charting tool up in the stickies section that is free to download. You can load the file in the program and it converts the spreadsheet data in to a linear graph that is pretty snazzy. This is fine for now though. I'm guessing you have a problem with the ICP sensor or it's wiring. Those numbers it's reporting in your pic. They are the default pressures the PCM uses when it's not getting anything from the sensor or it decides the sensor is wrong and disregards it. You can try unhooking the sensor and try starting it. That will take it out of the equation and the PCM won't be struggling through bad data.
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Lead Driver
Joined: Jul 2017
Posts: 6,855
Likes: 2,332
From: WV
Originally Posted by udsuth78
I'm guessing you have a problem with the ICP sensor or it's wiring. Those numbers it's reporting in your pic. They are the default pressures the PCM uses when it's not getting anything from the sensor or it decides the sensor is wrong and disregards it. You can try unhooking the sensor and try starting it. That will take it out of the equation and the PCM won't be struggling through bad data.
My first thought was a bad IPR but after seeing your screenshot it seems the ICP may be bad. It needs addressed first and may correct the issue.
Only purchase Motorcraft through a reputable seller. Amazon/eBay has way too many convincing fakes.
But try it disconnected first before buying any parts.
Cargo Master
Joined: Apr 2012
Posts: 2,024
Likes: 525
From: Bottom Of Pikes Peak
I should have also mentioned for your fuel bowl leak issue. Diesel o-rings has parts/ kits to fix that.
If you end up needing any sensors/ parts depending on what you find the issue to be. Diesel o-rings or riffraff is where i get most of my stuff but there are other reputable places as well.
I don't think it's been asked or provided, but are you getting any codes at all
If you end up needing any sensors/ parts depending on what you find the issue to be. Diesel o-rings or riffraff is where i get most of my stuff but there are other reputable places as well.
I don't think it's been asked or provided, but are you getting any codes at all
Thread Starter
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5th Wheeling
Joined: Oct 2023
Posts: 38
Likes: 2
I should have also mentioned for your fuel bowl leak issue. Diesel o-rings has parts/ kits to fix that.
If you end up needing any sensors/ parts depending on what you find the issue to be. Diesel o-rings or riffraff is where i get most of my stuff but there are other reputable places as well.
I don't think it's been asked or provided, but are you getting any codes at all
If you end up needing any sensors/ parts depending on what you find the issue to be. Diesel o-rings or riffraff is where i get most of my stuff but there are other reputable places as well.
I don't think it's been asked or provided, but are you getting any codes at all
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Probably should have lead with this. What are the codes you currently have exactly? Are they recurring, meaning after clearing/resetting the codes do all of them come back in a relatively short amount of time? Have you attempted to start the truck with the ICP sensor disconnected yet?
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From: Hoschton,GA
I would start by disconnecting the Banks tuner since that is hooked into the ICP and could be your issue.
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Thread Starter
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5th Wheeling
Joined: Oct 2023
Posts: 38
Likes: 2
The first day I had it completely stock and it still gave me the code and did not like to start after warm it ran great so I thought the truck was good so hooked it up and now it’s every time I try to start it
Thread Starter
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5th Wheeling
Joined: Oct 2023
Posts: 38
Likes: 2
Probably should have lead with this. What are the codes you currently have exactly? Are they recurring, meaning after clearing/resetting the codes do all of them come back in a relatively short amount of time? Have you attempted to start the truck with the ICP sensor disconnected yet?