No clue
Thread Starter
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Trailering
Joined: Dec 2021
Posts: 18
Likes: 3
No clue
Hey guys,
I've got an issue with my truck and i have no clue where investigate. It all started when I developed an oil leak while driving. Dipstick tube finally gave out and my truck started running like crap on the way home. I ordered and installed the 7.3 dipstick repair kit. Oil leak fixed. There was also a pretty heavy rain a couple days before that. So when I topped off my oil and attempted to start and got a crank, no start situation, my thoughts led me to my idm. No smoke out the tailpipe while cranking. I had a work trip I had to go on so I left it alone. I come back a month later and it starts now but runs with a slight miss and stalls when given throttle. Continuing forward, I pinout the injector harness and it passes all three tests. I replace the idm with known good spare I had. The problem persists though so I check fuses( all good), icp(600 at idle and will climb to 2800 when deadheaded) and ipr(10% at idle). Now I'm completely lost. I have an electric fuel pump and it's reading 55psi constant. I need help on where to look next. Sorry for the long post.
I've got an issue with my truck and i have no clue where investigate. It all started when I developed an oil leak while driving. Dipstick tube finally gave out and my truck started running like crap on the way home. I ordered and installed the 7.3 dipstick repair kit. Oil leak fixed. There was also a pretty heavy rain a couple days before that. So when I topped off my oil and attempted to start and got a crank, no start situation, my thoughts led me to my idm. No smoke out the tailpipe while cranking. I had a work trip I had to go on so I left it alone. I come back a month later and it starts now but runs with a slight miss and stalls when given throttle. Continuing forward, I pinout the injector harness and it passes all three tests. I replace the idm with known good spare I had. The problem persists though so I check fuses( all good), icp(600 at idle and will climb to 2800 when deadheaded) and ipr(10% at idle). Now I'm completely lost. I have an electric fuel pump and it's reading 55psi constant. I need help on where to look next. Sorry for the long post.
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 104
From: Ashland City, TN
Hey guys,
I've got an issue with my truck and i have no clue where investigate. It all started when I developed an oil leak while driving. Dipstick tube finally gave out and my truck started running like crap on the way home. I ordered and installed the 7.3 dipstick repair kit. Oil leak fixed. There was also a pretty heavy rain a couple days before that. So when I topped off my oil and attempted to start and got a crank, no start situation, my thoughts led me to my idm. No smoke out the tailpipe while cranking. I had a work trip I had to go on so I left it alone. I come back a month later and it starts now but runs with a slight miss and stalls when given throttle. Continuing forward, I pinout the injector harness and it passes all three tests. I replace the idm with known good spare I had. The problem persists though so I check fuses( all good), icp(600 at idle and will climb to 2800 when deadheaded) and ipr(10% at idle). Now I'm completely lost. I have an electric fuel pump and it's reading 55psi constant. I need help on where to look next. Sorry for the long post.
I've got an issue with my truck and i have no clue where investigate. It all started when I developed an oil leak while driving. Dipstick tube finally gave out and my truck started running like crap on the way home. I ordered and installed the 7.3 dipstick repair kit. Oil leak fixed. There was also a pretty heavy rain a couple days before that. So when I topped off my oil and attempted to start and got a crank, no start situation, my thoughts led me to my idm. No smoke out the tailpipe while cranking. I had a work trip I had to go on so I left it alone. I come back a month later and it starts now but runs with a slight miss and stalls when given throttle. Continuing forward, I pinout the injector harness and it passes all three tests. I replace the idm with known good spare I had. The problem persists though so I check fuses( all good), icp(600 at idle and will climb to 2800 when deadheaded) and ipr(10% at idle). Now I'm completely lost. I have an electric fuel pump and it's reading 55psi constant. I need help on where to look next. Sorry for the long post.
How long have you let it run?
When the rails loose oil, it takes a bit to get the air out.
I remember doing my injectors the first time and finally getting it started after 30 minutes. Then let it idle for a really long time. drove to the gas station and freaked out cause it just cranked and cranked.
There are tons of things that can cause other issues.
Map Sensor, ICP Sensor.
And depending on how you checked your pinouts, you might have missed a burnt harness under the VC.
Thread Starter
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Trailering
Joined: Dec 2021
Posts: 18
Likes: 3
Sounds like you ran it out of oil and the heads are not free of air yet.
How long have you let it run?
When the rails loose oil, it takes a bit to get the air out.
I remember doing my injectors the first time and finally getting it started after 30 minutes. Then let it idle for a really long time. drove to the gas station and freaked out cause it just cranked and cranked.
There are tons of things that can cause other issues.
Map Sensor, ICP Sensor.
And depending on how you checked your pinouts, you might have missed a burnt harness under the VC.
How long have you let it run?
When the rails loose oil, it takes a bit to get the air out.
I remember doing my injectors the first time and finally getting it started after 30 minutes. Then let it idle for a really long time. drove to the gas station and freaked out cause it just cranked and cranked.
There are tons of things that can cause other issues.
Map Sensor, ICP Sensor.
And depending on how you checked your pinouts, you might have missed a burnt harness under the VC.
How would I go about a more in depth pinout of the harness? And is there a way to definitively check the map and icp sensors.
Lead Driver
Joined: Apr 2016
Posts: 7,213
Likes: 1,341
From: Bahstun
https://www.ford-trucks.com/forums/1...load-test.html
load test the injector wiring in case of a break/weak spot
load test the injector wiring in case of a break/weak spot
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 104
From: Ashland City, TN
https://www.ford-trucks.com/forums/1...load-test.html
load test the injector wiring in case of a break/weak spot
load test the injector wiring in case of a break/weak spot
And unless i touch the harness it runs.
I'll fix it someday. hahaha
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 104
From: Ashland City, TN
Thank you for responding. I've been starting it on and off for a couple days now. I tried taking it around the block because i initially thought it was air in the rails too. It won't stay running long enough lol. I checked my icp plug and it had oil in it but when I unplugged it to see if the truck was using a default value, it died abruptly. Also, I'm developing good oil pressure according to my scan tool.
How would I go about a more in depth pinout of the harness? And is there a way to definitively check the map and icp sensors.
How would I go about a more in depth pinout of the harness? And is there a way to definitively check the map and icp sensors.
Its on the pass side firewall by the airbox.
The harnesses under the VC's do really strange stuff, specially if you had to do a bunch of long cranks.
I upgraded to the SD set to get rid of these issues.
I got sick of glow plugs burning the harnesses up.
Thread Starter
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Trailering
Joined: Dec 2021
Posts: 18
Likes: 3
https://www.ford-trucks.com/forums/1...load-test.html
load test the injector wiring in case of a break/weak spot
load test the injector wiring in case of a break/weak spot
Trending Topics
Lead Driver
Joined: Apr 2016
Posts: 7,213
Likes: 1,341
From: Bahstun
pull the loom wrap off and pull on each wire with about 20lbs of force
if it stretches, you got a break
if it stretches, you got a break
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Thread Starter
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Trailering
Joined: Dec 2021
Posts: 18
Likes: 3
I guessing asking if i could have a hpo problem when I'm seeing good numbers on my scan tool.
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
I'll try that. Thank you. I've also got a question though. I'm still leaning towards the problem being oil related. Instead shotgunning an ipr, I bought the o ring kit. My dilemma is that my symptoms point to a failing ipr but when I read oil pressure, it's telling me that I'm making 2800psi when cranking and 600 at idle. Whe I unplug my icp, the truck stalls and won't start. If my icp has failed, could the pcm being sending the scan tool false information? Also, could a broken wire produce the same symptoms? It's so consistent.
I guessing asking if i could have a hpo problem when I'm seeing good numbers on my scan tool.
I guessing asking if i could have a hpo problem when I'm seeing good numbers on my scan tool.
Thread Starter
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Trailering
Joined: Dec 2021
Posts: 18
Likes: 3
Id have to check again but ithink about 30 to 40%. And oil was low enough to need almost two gallons to fill back up. Nothing on the dipstick
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
I would just run it longer to see if it gets better bore buying anything for a test . As far as the ICP being 2800 , I would expect that with air in the oil lines ,
Thread Starter
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Trailering
Joined: Dec 2021
Posts: 18
Likes: 3
It hasn't gotten better and I still don't know what's wrong. I went ahead and bought an icp because I had oil in the plug and an ipr just because. No changes besides the truck no longer dies at idle. I can see when the truck is missing, I'm puffing smoke out of the exhaust pipe so fuel is being injected. I'm starting to wonder if I broke something under the valve cover😅. It kinda makes sense. I just bought larger injectors and I've been "enjoying" them. Responsibly ithought but who knows. The only weird thing is the truck has been pretty dependable and this just pops up after I run low on oil
Lead Driver
Joined: Apr 2016
Posts: 7,213
Likes: 1,341
From: Bahstun
what color smoke?
running out of oil wont damage this engine, HPOP stops feeding injectors before real damage can occur
possible you crushed a wire under VC but should show a code if that happens
missing with smoke could be low compression or injector not rid of all air
Did you do a compression test before injectors?
running out of oil wont damage this engine, HPOP stops feeding injectors before real damage can occur
possible you crushed a wire under VC but should show a code if that happens
missing with smoke could be low compression or injector not rid of all air
Did you do a compression test before injectors?
Thread Starter
|
Trailering
Joined: Dec 2021
Posts: 18
Likes: 3
what color smoke?
running out of oil wont damage this engine, HPOP stops feeding injectors before real damage can occur
possible you crushed a wire under VC but should show a code if that happens
missing with smoke could be low compression or injector not rid of all air
Did you do a compression test before injectors?
running out of oil wont damage this engine, HPOP stops feeding injectors before real damage can occur
possible you crushed a wire under VC but should show a code if that happens
missing with smoke could be low compression or injector not rid of all air
Did you do a compression test before injectors?
Would broken/bent rockers, pushrods or valve springs cause these same issues? I could see them cause misses and rough running but mine is only happening at 900ish rpm and up