Fuel pump/injectors/computer flash
Junior User
Joined: Nov 2011
Posts: 95
Likes: 0
From: SE Louisiana
I agree with cheezit & npccpartsman, get it out of there. Tech doesn't seem to have a clue or they are going to take you for a ride, could be an expensive one too !!!!
I would not let them re-flash either, find out what flash you have now then do some reading, it might be better, from what I've found out, is that latest detune, mileage & power go down, some say that the inductive heating kills FICM. Ed can tell you more about that. Drive like an old lady till you fuel pressure problem solved, I think Autozone lets out a fuel pressure test kit, check after blue spring installed & go from there.
I would not let them re-flash either, find out what flash you have now then do some reading, it might be better, from what I've found out, is that latest detune, mileage & power go down, some say that the inductive heating kills FICM. Ed can tell you more about that. Drive like an old lady till you fuel pressure problem solved, I think Autozone lets out a fuel pressure test kit, check after blue spring installed & go from there.
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Senior User
Joined: Aug 2007
Posts: 105
Likes: 0
From: Mobile, AL
What should the fuel pressure readings be? At what point will the blue spring no longer fix the pressure issue? It may be too late for me to stop them from replacing the pump...they had it in stock and were ready to install when they called me earlier. I gave them the go ahead to do it......
As for the flash, I have the buzz flash. This is the way it was when I got the truck summer of 2007.
As for the flash, I have the buzz flash. This is the way it was when I got the truck summer of 2007.
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Senior User
Joined: Aug 2007
Posts: 105
Likes: 0
From: Mobile, AL
I found the Ford part number for the kit and will call the dealer first thing in the morning to have them do this first before replacing the fuel pump. I also want them to give me the fuel pressure readings. What should they be and at what point are they too low?
Junior User
Joined: Nov 2011
Posts: 95
Likes: 0
From: SE Louisiana
The spring kit should get ya up around 55 lbs, I think that 40-42 min WOT. As far as the flash, all have buzz, some all at once(not good) some cycle 1 at a time(best) the latest will have inductive heating(hi load on FICM) this is info from a conversation with Ed 6 mo ago. I've been gathering info about flashes lately, looking to roll back, not happy with 12-13 mpg.
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
The stock regulator will hold about 55 (maybe 60) psi of fuel pressure with a good pump. The upgraded blue spring will put you in the 60+ range steadily. You shouldn't have less than 40/45 PSI at WOT (under load). You can't properly test fuel pressure without going for a drive unless it's already really low.
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Senior User
Joined: Aug 2007
Posts: 105
Likes: 0
From: Mobile, AL
I called the dealer this morning and told them to stop any work. I'm heaed in there in a little bit to talk with the tech about the fuel pressures and blue spring upgrade.
How low canthe fuel press be and still have the spring upgrade fix it? Meaning....at what point do I need to abandon the blue spring idea and go with a new fuel pump?
Can anyone answer this question quickly so I know before I get there?
Thanks!!
How low canthe fuel press be and still have the spring upgrade fix it? Meaning....at what point do I need to abandon the blue spring idea and go with a new fuel pump?
Can anyone answer this question quickly so I know before I get there?
Thanks!!
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Senior User
Joined: Aug 2007
Posts: 105
Likes: 0
From: Mobile, AL
Just left the dealer....he is holding off on the fuel pump and will flash the computer and wait overnight for a true cold start and go from there......he said the pulse width on the fuel pump or injectors is real low. He told me the numbers and what they should be, but I can't remember what he said.
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
how low is not always the question, theres also volume issues. no spec for volume though. I have seen trucks run with 0psi fuel pressure. have I seen other that will blow white smoke at 30 psi.
spect is 48-72. the blue spring will put you at 65-72 psi most ride 66-68 (with oem filters).
I have seen a new set of filter and a regulator go from 25on bad parts and go psi up to 68 psi after repairs.
spect is 48-72. the blue spring will put you at 65-72 psi most ride 66-68 (with oem filters).
I have seen a new set of filter and a regulator go from 25on bad parts and go psi up to 68 psi after repairs.
Former Vendor
Joined: Feb 2010
Posts: 1,803
Likes: 6
The spring kit should get ya up around 55 lbs, I think that 40-42 min WOT. As far as the flash, all have buzz, some all at once(not good) some cycle 1 at a time(best) the latest will have inductive heating(hi load on FICM) this is info from a conversation with Ed 6 mo ago. I've been gathering info about flashes lately, looking to roll back, not happy with 12-13 mpg.
The issue with the latest one, reported by some but not all, is a reduction in fuel economy.
Ed
Ed@ficmrepair.com
Junior User
Joined: Nov 2011
Posts: 95
Likes: 0
From: SE Louisiana
I took a 4 MPG hit & low end power after re-flash to VXBC9
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Senior User
Joined: Aug 2007
Posts: 105
Likes: 0
From: Mobile, AL
Picked up the trucklast night from the dealer. Reflash and new fuel pump. They said nothing else was wrong with it. She drove great coming home, but this morning is the true test with a dead cold engine. If she fires up quick and smooth this morning and doesn't stumble after I pull out of the driveway, then I know they fixed it right!
Headed out not to give it a try...
Headed out not to give it a try...