check engine light.

[LANDY]

well i took the car home today, its all legal now.
on the way home i was cruising @ 70mph, got a little excited punched it and it hit 100mph real quick, as soon after i let off light came on:(, i stopped and plugged in my OBD II.
code says: fuel line press sensor.
i cleared the code drove home normal (worried). never came on again.
i think is leaning out at high rpms.
WHAT DO YOU GUYS THINK?

[cougar9150]

What pump is in it? Does it have a boost a pump? Definitely change the filter for a peace of mind.



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[FordNut]

Several possible problems. Changing the fuel filter may help. If it has a BAP, turn it all the way up. If not, you need to get on a dyno where it can be datalogged to determine whether it's a problem with the pump, sensor, or tune.

[ImpalaSlayer]

i wouldnt go WOT until you figure it out. could go bang

[LANDY]

What pump is in it? Does it have a boost a pump? Definitely change the filter for a peace of mind.



Sent from my T-Mobile myTouch 3G using Tapatalk
it has a focus pump.

[FordNut]

Focus pump with BAP should have adequate capacity.

How much gas was in the car? Never go WOT with less than 1/4 tank.

[LANDY]

Several possible problems. Changing the fuel filter may help. If it has a BAP, turn it all the way up. If not, you need to get on a dyno where it can be datalogged to determine whether it's a problem with the pump, sensor, or tune. thae first thing i did when i got home was look for the BAP sensor, didnt see one. i think reimhart installs them on the left side of the trunk.

[LANDY]

1/2 tank was in the car.

[FordNut]

Focus pump without BAP may be marginal. Most people install the controls close to the subwoofer box.

[ImpalaSlayer]

thae first thing i did when i got home was look for the BAP sensor, didnt see one. i think reimhart installs them on the left side of the trunk.


should just be a little knob Landy.

[Pat]

I had a similiar experience after my fuel pump was changed to a high performance GT model, as part of the NOVI S/C kit.

It seems, someone told me, that the computer senses the increased pressure as an out of tolerance condition and activates the CEL, Fuel rail pressure sensor. I was getting a CEL often. I changed the fuel rail sensor, no help.

Turns out this parameter can be altered in the tune. I asked my tuner, Dennis Reinhart, for help and he sent me a revised file for my XCal 2. Now the CEL, fuel rail pressure sensor, comes on very infrequently. FWIW

But in case you actually have a bad fuel rail sensor, you can test it my pulling off the vacumn line and smell the sensor for gasoline. Should not be present.

[FordNut]

Unless you datalog you can't tell if it's too much pressure or too little pressure because they both set off the light with the same code. Too much is not a big deal, too little and you can blow the motor.

[LANDY]

should just be a little knob Landy.
correct! BTW im sure it doesnt have one.

[LANDY]

I had a similiar experience after my fuel pump was changed to a high performance GT model, as part of the NOVI S/C kit.

It seems, someone told me, that the computer senses the increased pressure as an out of tolerance condition and activates the CEL, Fuel rail pressure sensor. I was getting a CEL often. I changed the fuel rail sensor, no help.

Turns out this parameter can be altered in the tune. I asked my tuner, Dennis Reinhart, for help and he sent me a revised file for my XCal 2. Now the CEL, fuel rail pressure sensor, comes on very infrequently. FWIW

But in case you actually have a bad fuel rail sensor, you can test it my pulling off the vacumn line and smell the sensor for gasoline. Should not be present.
Pat, that all makes sense, i spoke with the gentleman who sold me the car, he said as soon as he picked up the car from Dennis when he S/C it, on the way home the same code came on, he called Dennis and he told him it was not a problem, to pass by his place and he could get the code not to come on as often, but the gentleman never did.:shake:
thanks for your input.

[LANDY]

Unless you datalog you can't tell if it's too much pressure or too little pressure because they both set off the light with the same code. Too much is not a big deal, too little and you can blow the motor.
agreed. lean at WOT= BOOM.

[Pat]

I did have my fuel system pressure checked when I replaced the sensor and my pressures were good. 45lbs at low RPM I believe. The tech tested the pump with the full 12V from the battery (motor off, ignition on) and it registered properly, 90lbs(?) I seem to recall.

[scruff]

yea baby but what a way to go lol all the terriosts are doing it Boom!

[Todd]

Kenne bell makes the little disks to go just before the frps that avoids spikes and the cel. But best to log and check your pressure.

[cougar9150]

If you don't have a log file for your SCT tuner let me know. I tried with mine and it told me I needed some log file installed. Not sure if that is normal or not for the SCTs.

You can borrow my Diablo tuner to run some data logs until I get the ride back together and need to get it tuned. Staying with the Predator as I like the user friendlessness of it vs the X-cal 2.


Kenne bell makes the little disks to go just before the frps that avoids spikes and the cel. But best to log and check your pressure.

Good call Todd, they did an article about these not that long ago in one of the Mustang mags.

[LANDY]

well, i datalogged the car. it seems to drop at fuel rails to 25psi at wot, while voltage at pump is 11.6 vdc. awaiting on spare time to install a 10 gauge wire with a 30amp relay to see what happens.

[justbob]

Did you ever pull the vacuum line off the FRPS and smell for gas? Mine wreaks of fuel, new one and a KB disc on order.

[LANDY]

Did you ever pull the vacuum line off the FRPS and smell for gas? Mine wreaks of fuel, new one and a KB disc on order.
i just did and as soon as i disconnected it the line was brital and it broke,
guess now i need a new one.
do you know where to get one? or part #

[justbob]

FRPS: 3R3Z-9F972-AA

http://www.tousleyfordparts.com/partlocator/index.cfm?action=getLocator&siteid=214771&chapter=DP2FV0&appSectionid=6&groupid=10024&subgroupid=20066&componentid=60661&make=23&model=Marauder&year=2003&catalogid=1 Won't find any cheaper.

KB disc:http://dagostinoracing.com/index.php?main_page=product_in fo&products_id=13875

Perhaps you had a vacuum leak if the hose fell apart? Any fuel odor?

[LANDY]

nope, it smell normal to me.
thanks

[LANDY]

FRPS: 3R3Z-9F972-AA

http://www.tousleyfordparts.com/partlocator/index.cfm?action=getLocator&siteid=214771&chapter=DP2FV0&appSectionid=6&groupid=10024&subgroupid=20066&componentid=60661&make=23&model=Marauder&year=2003&catalogid=1 Won't find any cheaper.

KB disc:http://dagostinoracing.com/index.php?main_page=product_in fo&products_id=13875

Perhaps you had a vacuum leak if the hose fell apart? Any fuel odor?
does the regulator comes with the vacum hose?

[-Matt-]

nope, it smell normal to me.
thanks

Thats what she said

[justbob]

does the regulator comes with the vacum hose?
I just ordered today, but I would have to doupt it. Mine has all been rearanged/rerouted differently anyways.

[ImpalaSlayer]

well, i datalogged the car. it seems to drop at fuel rails to 25psi at wot, while voltage at pump is 11.6 vdc. awaiting on spare time to install a 10 gauge wire with a 30amp relay to see what happens.

dont you have a BAP?

[FordNut]

well, i datalogged the car. it seems to drop at fuel rails to 25psi at wot, while voltage at pump is 11.6 vdc. awaiting on spare time to install a 10 gauge wire with a 30amp relay to see what happens.

Not enough information. You need to know the FPDC (Fuel Pump Duty Cycle) and you have to datalog the data commanded from the PCM to know that.

[LANDY]

I just ordered today, but I would have to doupt it. Mine has all been rearanged/rerouted differently anyways.
thanks, i made my own vacum line from a left over line i had at work in my toolbox. worked fine.

[LANDY]

dont you have a BAP?
nope. i wish i had one but the fact that i have heard that the dual focus pumps can draw alot of current makes me think i should try running the bigger gauge wire first. we will see.

[LANDY]

Not enough information. You need to know the FPDC (Fuel Pump Duty Cycle) and you have to datalog the data commanded from the PCM to know that.
im kind of lost in what you are trying to make me understand, can you please clarify if possible.
i know i can see the FPDC when datalogging, but im i missing something?
thanks

[Kennyrauder]

I had a similar problem after Dennis installed my Vortech. My T/Code was lean left bank. Dennis sent me 2 different patches before the code never came on again. That's my whole trouble... I'm only about 1800 miles north of Dennis & still a real hard days drive to Lidio in Detroit. Lidio gave me a retune last spring...Marauder runs great.

[FordNut]

Is the fpdc 100% when you datalog a WOT run?

[LANDY]

Is the fpdc 100% when you datalog a WOT run?
didnt notice it, since as soon as my gf who was watching the #'s while i flored it said 25 psi, i let of not wanting to hurt the motor. it was a total of 3 seconds. i can try it tomorrow after work i guess, since i didnt save the data.
thanks Brian, you always provide good help.:beer:
LANDY

[FordNut]

I'm not sure how you're datalogging. Most people datalog and save the info to a file, then look at the data.

[FordNut]

So what's the duty cycle?

[Ozark Marauder]

^ ^^^+1^^^^

[LANDY]

this is what it looks like at wot
Time (sec) fp_duty_cycle FPUMP_ACT_VOLTS FUEL_PMP_DC fuel_rail_pr_psi TRANS_OIL_TEMP
294.0635/ 0.4899902/ 11.5/0.4866943 /32.85938 /158.375
294.4699 /0.4899902 /12.0625 /0.489990 /231.5 /158.625
on the duty cycle i dont know what those #'s mean, can you exlplain please

[FordNut]

I'm not certain about reading the datalogs, but it appears to be requesting about 50% (48.99902) duty cycle. So my first thought would be that the tune is not even trying to max out the pumps (that should be 100% duty cycle). If that is the case you can change every part in the whole fuel system and not make a difference (except to your wallet).

I assume the data posted is two separate lines of datalogs, one thing that puzzles me is the next-to-last data being 32.86 in one line and 231.5 in the next. It might help in understanding the datalog information if you printed out a few lines of data at idle, then a few lines at WOT. If I am misunderstanding the datalog, maybe the first duty cycle data field is for MAX and the actual is the DC field. If that is the case it IS requesting 100% so my first statement would be wrong and there could be some issue with the fuel system.

[LANDY]

I'm not certain about reading the datalogs, but it appears to be requesting about 50% (48.99902) duty cycle. So my first thought would be that the tune is not even trying to max out the pumps (that should be 100% duty cycle). If that is the case you can change every part in the whole fuel system and not make a difference (except to your wallet).

I assume the data posted is two separate lines of datalogs, one thing that puzzles me is the next-to-last data being 32.86 in one line and 231.5 in the next. It might help in understanding the datalog information if you printed out a few lines of data at idle, then a few lines at WOT. If I am misunderstanding the datalog, maybe the first duty cycle data field is for MAX and the actual is the DC field. If that is the case it IS requesting 100% so my first statement would be wrong and there could be some issue with the fuel system.
the 231 means 23.1 psi at the fuel rails.
i tried to post the whole dataloging but it wouldnt let me.

[FordNut]

Doesn't make sense. One line says 32.86, I assume it actually means 32.86 psi? The next line says 231 but it actually means 23.1??? Scaling should be consistent.

[LANDY]

http://i288.photobucket.com/albums/ll166/lizz629/2-7-10.jpg

[LANDY]

i also did a pull with my aeroforce gauge and the fuel pump duty cycle went to 98.9%. while the fuel press was at 24psi.

[LANDY]

Doesn't make sense. One line says 32.86, I assume it actually means 32.86 psi? The next line says 231 but it actually means 23.1??? Scaling should be consistent.
the line that says 32 psi is because it was on the way to the peak point on the throttle.

[FordNut]

That graph is the most informative data so far...

[FordNut]

I would suggest pulling the pumps. The tune is commanding the pumps for more pressure but it's not going up. Looks like maybe a leak. Possibly the hoses inside the fuel hat. Or the PPRV. Maybe even one of the pumps is bad. One possible test before pulling the pumps would be to connect a fuel pressure gauge to the fuel rail and verify the pressure it reads is comparible to the datalogs. That would confirm that there isn't an intermittent connection to the FRPS.