7.3 no start continued
Lead Driver
Joined: Oct 2003
Posts: 8,476
Likes: 37
From: Madison, WI
The pedal does nothing while cranking. It's like turning the volume up on a stereo that's not turned on. The PCM controls pretty much everything while cranking. It's the 379 psi HPOP (presumably ICP) that's the concern. Either the engine isn't cranking fast enough for the HPOP to build the needed pressure, or there's an HPOP problem. I wonder, too, if it might be an ICP sensor issue. Might be worth disconnecting the ICP; that forces a default pressure, and it MIGHT start.
There's a thread on Torque Pro for the OBS here on FTE, and a VERY long sticky thread on "the Nation".
There's a thread on Torque Pro for the OBS here on FTE, and a VERY long sticky thread on "the Nation".
Thread Starter
|
Senior User
Joined: Nov 2017
Posts: 120
Likes: 0
The pedal does nothing while cranking. It's like turning the volume up on a stereo that's not turned on. The PCM controls pretty much everything while cranking. It's the 379 psi HPOP (presumably ICP) that's the concern. Either the engine isn't cranking fast enough for the HPOP to build the needed pressure, or there's an HPOP problem. I wonder, too, if it might be an ICP sensor issue. Might be worth disconnecting the ICP; that forces a default pressure, and it MIGHT start.
There's a thread on Torque Pro for the OBS here on FTE, and a VERY long sticky thread on "the Nation".
There's a thread on Torque Pro for the OBS here on FTE, and a VERY long sticky thread on "the Nation".
Post Fiend
Joined: Dec 2010
Posts: 10,121
Likes: 3
From: Orrville, Ohio
Good call. That hadn't occurred to me.
I know what the injector pulsewidth means, but that's still a STUPID high number for injector pulsewidth unless the scale is messed up somehow and it is showing nanoseconds instead of milliseconds. Just as a comparison, data logging my truck on a hard tow injector pulsewidth never gets above 4ms (it ranges from around 1.1ms at idle to 3.8ms at WOT on a hard run - and that's with a pretty aggressive tune and stage 1 injectors). Your reading is 100 times that high, which just seems odd to me.
The only thing I would recommend that you don't already have on there is RPM. That RPM number will also tell us whether the PCM is getting a solid signal from the CPS as well.
what you're seeing from the injectors is the injector pulse width and from what I read is just the amount of time the injectors are open. I believe also from what I've read the battery voltage should be at least 10.5 volts and that's what is needed to start the truck. Mind you now upon changing batteries my tach has been operating as it should be 2 to 300 rpms while cranking and even though it won't stay running Sunday after I plugged the block heater in I was getting no smoke what so ever. This to me since the truck actually isn't running resembles a cold start but won't start when warm which does lead back too hpop. I have the ford pids on toque pro if anyone recomends any gauges to add that I don't have on mine so far.
The only thing I would recommend that you don't already have on there is RPM. That RPM number will also tell us whether the PCM is getting a solid signal from the CPS as well.
Thread Starter
|
Senior User
Joined: Nov 2017
Posts: 120
Likes: 0
Good call. That hadn't occurred to me.
I know what the injector pulsewidth means, but that's still a STUPID high number for injector pulsewidth unless the scale is messed up somehow and it is showing nanoseconds instead of milliseconds. Just as a comparison, data logging my truck on a hard tow injector pulsewidth never gets above 4ms (it ranges from around 1.1ms at idle to 3.8ms at WOT on a hard run - and that's with a pretty aggressive tune and stage 1 injectors). Your reading is 100 times that high, which just seems odd to me.
The only thing I would recommend that you don't already have on there is RPM. That RPM number will also tell us whether the PCM is getting a solid signal from the CPS as well.
I know what the injector pulsewidth means, but that's still a STUPID high number for injector pulsewidth unless the scale is messed up somehow and it is showing nanoseconds instead of milliseconds. Just as a comparison, data logging my truck on a hard tow injector pulsewidth never gets above 4ms (it ranges from around 1.1ms at idle to 3.8ms at WOT on a hard run - and that's with a pretty aggressive tune and stage 1 injectors). Your reading is 100 times that high, which just seems odd to me.
The only thing I would recommend that you don't already have on there is RPM. That RPM number will also tell us whether the PCM is getting a solid signal from the CPS as well.
Post Fiend
Joined: Dec 2010
Posts: 10,121
Likes: 3
From: Orrville, Ohio
Yeah, that gauge is indicating 424 milliseconds. Just seems odd...
Let me just ask too, since I don't think I ever heard the whole story....How did this all start? Truck just didn't start one day or did this start following a repair? Has the truck ever run since you've had it? Just kinda hard to follow since the conversation started in a previous thread and I wasn't a part of it.
Let me just ask too, since I don't think I ever heard the whole story....How did this all start? Truck just didn't start one day or did this start following a repair? Has the truck ever run since you've had it? Just kinda hard to follow since the conversation started in a previous thread and I wasn't a part of it.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
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
Thread Starter
|
Senior User
Joined: Nov 2017
Posts: 120
Likes: 0
Yeah, that gauge is indicating 424 milliseconds. Just seems odd...
Let me just ask too, since I don't think I ever heard the whole story....How did this all start? Truck just didn't start one day or did this start following a repair? Has the truck ever run since you've had it? Just kinda hard to follow since the conversation started in a previous thread and I wasn't a part of it.
Let me just ask too, since I don't think I ever heard the whole story....How did this all start? Truck just didn't start one day or did this start following a repair? Has the truck ever run since you've had it? Just kinda hard to follow since the conversation started in a previous thread and I wasn't a part of it.
Thread Starter
|
Senior User
Joined: Nov 2017
Posts: 120
Likes: 0
what should be the icp reading? The icp and pigtail are brand new and I have the same results with icp unplugged just smoke truck won't fire
Thread Starter
|
Senior User
Joined: Nov 2017
Posts: 120
Likes: 0
never mind that's the hpop on the gauge at 379 it needs to be 500 correct
Senior User
Joined: Nov 2006
Posts: 222
Likes: 0
From: Sayreville, NJ
I have been following this thread and I believe it is either bad NEW IPR or weak HPOP.. You could block off the oil lines and deadhead the HPOP and check ICP. One other possibility is the IPR is not getting voltage at the connector.
If still low there is a test plug that can be inserted in place of the IPR and check just the HPOP with out the IPR
https://www.accuratediesel.com/shop/259.html
If still low there is a test plug that can be inserted in place of the IPR and check just the HPOP with out the IPR
https://www.accuratediesel.com/shop/259.html