Montana

Yes i reset the battery and did many check. fule filter brand new, pump brand new. fuel is not reaching the fuel supply line coz the pump stops delivering fuel on acceleration due to lack of voltage, it should get 12v on full TB but only 6 to 9v maximum are being logged.
Its 99% electrical issue.

Montana

I figure it out about the wires, now how to check them for short circuit, i have a voltmeter

cdynaco

Do a continuity check with the meter's battery. Attach one lead to a wire at the PCM, attach the other lead to the same colored wire at the FPDM EDIT - add: (yes you're going to have to run extra wire). Your meter should show current if there is no break in the line. Then check the next wire...

According to the manual:

Do you think a fuel line or a wiring harness got pinched during shipping? Just seems like a wiring defect between the PCM and FPDM is a long shot.

Have you checked the fuel rail pressure and temp sensor? EDIT - add: Perhaps a faulty sensor (or connector) here is giving the PCM wrong information? Which ends up in not enough fuel being pumped?

Are you on the stock tune or a custom tune for your CAI? Could the custom tune get corrupted somehow?

cdynaco

Out of this whole thread, this is the only mention of a fuel pump issue.

https://themustangsource.com/f739/ou...3/#post5944071

Here's the TSB:

http://www.stangpit.com/wp-content/i...tsb/06-9-9.pdf

2k7gtcs

Maybe I missed it but what is the exact new fuel
pump you got? Is it a stock replacement for GT or the Cobra dual pump?

Montana

No its not that TSB that im having its totally different coz i have the new fuel pump that the TSB tells to replace and i installed it last week.

Im on stock tune now. no mods at all the car is stock. fuel pressure is very low on acceleration and on WOT due to lack in electricity (thats what i presumed coz i have low voltage at the pump)

Dont think that the new pump is defected coz the old one had the exact problem.

I will check those wires tomorrow hope its the end of my nightmare, its 4AM in here i go to sleep and will get back to you tomorrow, i appreciate your help you did to me so far

Montana

Stock motorcraft new pump that i shipped for the US.

2k7gtcs

Ok just curious. I added the Cobra dual fuel pump and it required making connections that could be done wrong plus I had to add a power wire to the SBJ.

But that was a totally different pump. Sorry I can't help.

Montana

Hello how are you today, here is so me test i did:

The car now stalls at 3000-3500 RPM it was on 5000-5500 RPM last week.
I could reach the rev limit on WOT while car is parked, now i can only reach 3000-3500 RPM
If i floor it slowly in park mode i can reach the rev. limit, if i WOT it fast it stalls on 3000-3500 RPM but engine never shut off.

I have a PA 130am + 4g wire that i shipped from the US, it has 4k miles on it now only.
Changed to a new battery today, no changes.
Changed back to the old Alt. today, no changes.

Ran a voltage test on battery and PA Alt: 13v on key on, 13.88v on idle, 14.1v on 2000 rpm.
Ran a PCM to FPDM wire test (#12,#21) both wires pass ok.
Ran an FPDM test, 12.66v on idle, voltage fluctuates between 13v & 13.33V on WOT.
Ran a wire directly from FPDM to FP, 12v on key on. / fluctuates between 3v-5v on idle. / fluctuates between 4v and 7v on WOT ---> rpm never reached more than 3500 on WOT<-----

Im totlay lost in my country, what else should i check any ideas?

cdynaco

I keep wondering...

About code P1000 - why isn't it able to complete its tests? Is something unhooked? An accurate code would help.
With the P0148 - have you visually checked to see the fuel line isn't crimped anywhere during shipping.
Since the PCM controls the fuel, could one of the other sensors be giving wrong info to the PCM, therefore the PCM doesn't provide full current to the fuel pump to provide full fuel flow?
You're chasing electrical but maybe its a sensor problem.

Did the car ever run good after you imported it?

Montana

Yes 2 years and the car was going fine, some lean conditions under hot weather, changed alt after a code, new battery too, nothing much, but now its a sever problem.
Reagrding the fuel line of the pump itself, today i gave it straight 12v and it spinned out and injected fuel normally.

Which sensors i should look for? and can you send me the fuse box connector wiring diagram (not the fuses itself i have them) just to check PCM fuel pump wires that passes throught the fuse box inside pins.

cdynaco

From the 2008 manual:

The PCM carries out the following:
1) accepts input from various engine sensors to compute the fuel flow rate necessary to maintain a prescribed air/fuel ratio throughout the entire engine operational range.
2) outputs a command to the fuel injectors to meter the approporiate quantity of fuel.
CMP sensor: sends the PCM a signal indicating camshaft position used for fuel syncrhonization.
CKP sensor: sends the PCM a signal indicating crankshaft position, essential for calculating spark timing.
MAF sensor
HO2S sensor: creates a voltage signal dependent on exhaust oxygen content, providing feedback information to the PCM used to calculate fuel delivery. (looks like they're before the cats)
Fuel rail pressure and temperature sensor: measure the pressure and temperature of the fuel rail and sends these signals to the PCM (uses intake manifold vacuum as a pressure reference).

Found this little tidbit on another forum. Perhaps it will help eliminate any FRPS issues:

Fuel tank pressure sensor FTP (hence my question about the fuel cap/gasket fitting tight. And some 05's had the fuel tank fill issue and guys would overfill which would overflow into the EVAP canister and plug up which would create a vacuum causing fuel flow problems).
Interia Fuel Shutoff IFS switch.

Any time the fuel line connectors are disconnected, be sure to lubricate the O rings of the connectors with clean engine oil before reconnecting to insure a tight seal in the line.
Is the fuel filter installed properly for direction of flow?

KdF

Let me throw this out for the hell of it. I know we seem to be looking for a short or such to the fuel pump. My questions are thus....
1.) Has the junction-box on the passenger side kick plate been open for something like a trunk release switch? Has it ever gotten wet?
2.) have you checked the rocker panel on the passenger side to be sure there is no water or rustor kinks in the wires there?
3.) Have you run a wire from the junction box where the fuel pump wire comes from to the fuel pump to check?
I have no first hand experiance in this problem, but I would check those first if that was my car.

Montana

The car had an accident on the passenger fender side and was replaced, now it might be that the junction box was affected by the accident shock but the car ran fine after changing the fender for more than a month.
im sure its not wet its very hot climat here.

Now you drove my attention to that, i ran a wire from the PCM to FPDM. Please, do you have a wiring diagram to show me for that box?

Montana

Charlie those are interesting things to chck too but KDF gave me this idea (read my reply to him)

Please, do you have a wiring diagram to show me for that inner fuse box that shows how the wires goes from it to the pump like we did with the PCM wiring diagram?

cdynaco

This is all I have access to online.

Montana

Its like searching for a needle for me, not familiar ill give it a try, tomorrow ill try a new fpdm and ill check those wires in the passenger side box then i will check the sensors you told me to cheeck. will keep you posted

KdF

http://www.allfordmustangs.com/forum...nction-box.doc

This is for the Junction box. I have not looked at it yet. Give it a shot and see.

Montana

This is the side kick oassenger side box yes? i didnt see any fuel pump wires/pins, i only saw fuel sender ones (that indicates fuel level), the fuel sender is running fine, enlighten me a bit

Lime GT

If the vehicle was hit in the right front I would recheck the following grounds points to make sure they are not loose or disconnected. G100; G102; G103 are most important near rt frt. Also G106; G107; G101; G400. Only you know the damage done and if wiring was pinched, cut, or casing rubbed through to allow corrosion into the wiring.