Need help
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Need help
Well where do I start? so my 7.3 swallowed about 2and a half gallons of oil in less then 10 miles so I pulled the engine and pulled the heads did the head gaskets new injectors cups new injectors (stock) new high flow caps and banjo bolts resealed the fuel bowl new compression sleeves and I did the fuel bowl mod now I don't get over 43 psi fuel pressure did I get air in my fuel lines or head and if so can I get it out and how I been working on this thing for a year new trans now it will turn over but no start and I don't want to mess the new injectors up thanks all help is greatly appreciated
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No but when I took my fuel filter out it was black so I assumed yea I kno what it means 😏
wasn't trying to mess anyone's morning mood up was on joking about it could really use the advice
wasn't trying to mess anyone's morning mood up was on joking about it could really use the advice
Last edited by Chris bayne; Nov 29, 2021 at 01:33 AM.
Lead Driver
Joined: Oct 2005
Posts: 6,129
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From: Ponca City, OK
What fuel bowl mod are you referring to? 43# is on the low side but it won't prevent start up. Do you have forscan or AE to monitor engine pid's while cranking? Did you pre-fill the reservoir before any start attempts, how many attempts have you made, how long are you cranking during each attempt? Triple checked sensor connectors, fuses all checked w/ a multimeter, unplugged the fuel bowl heater?
FTE Chapter Leader
Joined: Jan 2005
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From: Henderson, NV
In addition to what the others have mentioned, how are you measuring fuel pressure? Logging PIDs will go a long ways to helping diagnose your issues. Using the PID Charting Tool is highly recommended. Details here: https://www.ford-trucks.com/forums/1...d-version.html
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No I haven't had the chance can't find my scan tool will see if I can today or get another one and will update for you as far as the bowl mod it was the one where he took the plunger out of the bowl I believe the part that's in the center yes I filled the res but it won't get past around 42-43 psi and when cranking it drops imma start at my tank and start working down the lines today I just put the pump on about a month before the truck took a crap i will supply updates as I move forward thanks
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Joined: May 2014
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From: Lake Hartwell, GA
@Chris bayne , welcome to the FTE! 
Your not messing anyone's morning mood up. We are here to help and look forward to finding the resolution with you being the eyes and hands.
If you need to purchase another scan tool, check out the last link noted below that I took from the 7.3L PSD Tech folder.
FORScan
No I haven't had the chance can't find my scan tool will see if I can today or get another one and will update for you as far as the bowl mod it was the one where he took the plunger out of the bowl I believe the part that's in the center yes I filled the res but it won't get past around 42-43 psi and when cranking it drops imma start at my tank and start working down the lines today I just put the pump on about a month before the truck took a crap i will supply updates as I move forward thanks
FORScan
- FORScan Instructions - PC
- FORScan Lite Instructions - Android
- FORScan Lite Instructions - iOS
- FORScan Data Log Conversion
- FORScan + FORScan Lite: Class Tutorial Q&A
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It is truly appreciated ok I am checking the pressure two ways I have my gauge in the truck which is on the post filter side and I have a injection gauge on the pre filter spot both read the same pressure I just done the tank mod from a post in here so I will be checking fuel pressure again shortly
Last edited by Chris bayne; Nov 29, 2021 at 12:01 PM.
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I will be looking at that as it looks like imma need to get another OBDII Reader can't find mine but I was using forsxan when it was running only thing kept me running this long. I'm not throwing parts it's what I already have done before I dropped the motor back in my lock ring owing was not set right so I fixed that today had a broken ear where it slides on the fuel pump from tank that I am gonna fix today with the wix filter and hose and see if that was the issue I don't believe it will but it was gonna be a problem sometime
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From: WV
Yes, unless the fuel is bleeding off fairly quickly somewhere so even with a closed FPR the system can’t keep up. New cups could be a culprit. Hate to say that but just my thought.
I would consider a FPR rebuild. The OP could also block the return line and see how much pressure it builds. If that makes it build good pressure then the FPR is likely bad.
It should still start on 43psi though.
Sorry, I can’t remember all the details from the thread if he got it started.
I would consider a FPR rebuild. The OP could also block the return line and see how much pressure it builds. If that makes it build good pressure then the FPR is likely bad.
It should still start on 43psi though.
Sorry, I can’t remember all the details from the thread if he got it started.
