Random stalling, large fluctuations. - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 11-08-2019, 07:24 AM Thread Starter
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Random stalling, large fluctuations.

(I realized this is way too long) Short version
1.) Truck stalls after start up, sometimes have to rev up to start.
2.) Fuel pressure gauge bounces from 30-70 psi
3.) Misfire on acceleration from probably 1500-2500 rpm

I'm assuming it has a problem with the IPR or CPS, how can I narrow it down to which one?
Would the IPR somehow cause the pressure to bounce drastically?
YouTube link with a video of gauge fluctuations.

https://youtu.be/8wJ24XY-Svs

------------- Long Version.
Hey, I have a 97 f250 7.3. I had a huge fuel leak in the valley so I made my own fuel bowl delete. Got it all set up and turned out the fuel pump was also leaking out the weep hole. Replaced the pump.

The gauge was bouncing from 50-60 psi after I set the pressure, which is normal.

The next day I started it up first thing in the morning, -20c not plugged in, started great and I shut it off. Couple hours later I went out to start it to warm it up and it just kept stalling and I had to rev it to get it to go. (Block heater was plugged in). It finally started to run and the gauge was bouncing from 30-70.

The truck seemed to run good but after it got warm it was like it was misfiring as I accelerated. And if I shut it off it would stall once I started it back up.
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post #2 of 8 Old 11-08-2019, 08:20 AM
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Sounds to me like it is not getting enough fuel or there is air in the line. Might need to let it run a while to clear it out unless there is air getting into the line somewhere.

HILLBILLY EXPRESS-2000 F-250 CC SB *SOLD W/ 342,000 MILES*

HULK-2015 F-250 LARIAT CCSB
B&W GOOSENECK HITCH, GO RHINO RB10 STEPS

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post #3 of 8 Old 11-08-2019, 09:16 AM Thread Starter
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It ran for around half an hour last night. Maybe longer. I just got back inside, I tightened up all the fuel lines and checked my IPR. There is quite a bit of oil on the bottom side of it. Would I be ok to just replace the o-ring and clean it up? Or should I replace the whole unit. I have way to much money into this truck and I don't want to just throw parts at it.
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post #4 of 8 Old 11-08-2019, 10:01 AM
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Have you unplugged the IPC (Injection pressure control) Sensor and ran it with that unplugged?

HILLBILLY EXPRESS-2000 F-250 CC SB *SOLD W/ 342,000 MILES*

HULK-2015 F-250 LARIAT CCSB
B&W GOOSENECK HITCH, GO RHINO RB10 STEPS

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post #5 of 8 Old 11-08-2019, 10:10 AM Thread Starter
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I put a new IPC in it a couple months ago because the old one was leaking through the plug.
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post #6 of 8 Old 11-08-2019, 10:11 AM Thread Starter
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I'm going to go to Grainger and buy some new o-rings for the IPR and replace those today. Hopefully that helps.
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post #7 of 8 Old 11-12-2019, 10:36 AM
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Any luck with the O-rings?

HILLBILLY EXPRESS-2000 F-250 CC SB *SOLD W/ 342,000 MILES*

HULK-2015 F-250 LARIAT CCSB
B&W GOOSENECK HITCH, GO RHINO RB10 STEPS

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post #8 of 8 Old 11-12-2019, 09:34 PM Thread Starter
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I just put the o-rings on today. It was definitely leaking bad. I also did an oil change and put 0w40 Rotella t6 in. It would only start with the ICP unplugged. It's a newer ICP. It has maybe 100 km on it.
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