My Car Just Died

[ggt4]

I was driving at normal speed coming aroud a corner and the engine just died. I coasted to a stop and tried to restart...It cranks and cranks but thats it

[MarauderTJA]

I was driving at normal speed coming aroud a corner and the engine just died. I coasted to a stop and tried to restart...It cranks and cranks but thats it

Hope you find out what happened. Keep us posted.

[RoyLPita]

+1 on keeping us posted.

[KillJoy]

Did you run out of gas?

KillJoy

[3rdcoastmrauder]

Did you run out of gas?

KillJoy


:lol:

hope thats all

[STLR FN]

Care to mention any noises that might/may have arised at the untimely death?

[MERCMAN]

Sounds to me like the "infamous" wire harness chafing. Check the wire harness just below the wiper assembly on the driver side. One member here had the exact same problem. It was TTA with his first MM. This was a problem with early 300a's. I will do a search and see if I can find the post :up:

http://www.mercurymarauder.net/forums/showthread.php?t=5152&highlight=chafing

http://www.mercurymarauder.net/forums/showthread.php?t=2454&highlight=harness+chafing

[MERCMAN]

here is a pic

[wchain]

+1 on the wiring harness

[rvaldez1]

Fuel Pump?

[merc]

Fuel Pump?

2 votes on the fuel pump. I have a Ford GT pump and it can be heard in pre-ignition. I am sure yours emits some noise when working.

[Motorhead350]

Make that 3 on the fuel pump.

[HwyCruiser]

Since you just swapped the pumps during the s/c install I'd look to the pump too. You should hear it prime when you turn on the key. Check with the Predator to see what fuel pressure it's putting out with the key on. Should be around 42 psi.

[Zack]

If you have a Focus pump in there and a BAP, but didnt upgrade the fuse to a 30 amp, that is the problem.
Only had to happen to me once to find that out.

[magindat]

Intake air hose loose sucking unmetered air.

[ezratty]

how bout that fuel pump shut off switch in the trunk. I have seen cars that experiance a small jolt and the inertia switch cuts off.

[tmac1337]

2 votes on the fuel pump. I have a Ford GT pump and it can be heard in pre-ignition.

Why settle for one pump.....when you can have TWO!:D

[mtenderenda]

I'm going with the wiring harness....:bows:

[baltimoremm]

+1 on the fuel pump cutoff switch.
Mine did the same thing when i went around a corner and a box slid over and tripped the switch. Took 30 minutes of me swearing at the car to realize it was something so simple.

[ggt4]

The car has no fuel pressure....so I guess its the fuel pump

[Zack]

Did you check the fuse and inertia switch?

[ggt4]

no i havnt checked yet im going out to do it now... just pressing the fuel cutoff switch is how you check it? And which fuse is it?

[RCSignals]

.............. And which fuse is it?

the one that's blown

[ggt4]

the one that's blown

very helpfull

[HwyCruiser]

The 20A fuse #5 in the main fuse box next to the battery is for the fuel pump.

[ggt4]

fuse is good....its not the switch.....i just removed the fuel pump and strainer wasnt on it so maybe the pump got clogged with something.

[ggt4]

Im gonna swap the pump out.....isnt there someone one the site that can get the ford gt pump? And is the gt pump the best one to go with?

[merc]

Im gonna swap the pump out.....isnt there someone one the site that can get the ford gt pump? And is the gt pump the best one to go with?

Contact the dealer (Ray) on this site for the GT Fuel pump but understand the install differances. You need to cut some wires and most people object to making new connections.

ORDER PARTS AT 1-800-216-6411 RAY SR.

[ggt4]

do you have a number for him? or where can i get that info?

[merc]

Read this

http://www.mercurymarauder.net/forums/showthread.php?t=27632

[wchain]

I can get GT pumps too if you cant get one from Ray......

[ggt4]

i didnt see you already posted the number....thanks i'll call tomorrow

[HwyCruiser]

I'd call Greg tomorrow. If it's a defective pump then it'll covered under warranty. Did you find the strainer?

[ggt4]

no its still in the tank....i gotta see if i can find it without dropping the tank

[Marauderjack]

How'd you get the pump out without dropping the tank in the first place??:confused:

If by chance you DID drop the tank to install the new pump and unplugged all of the electrical connections there is a GOOD chance you didn't get the one above the tank on the passenger's side plugged back in TIGHT......THAT ONE gave me a fit for a couple days with the pump cutting off!!!!!!!:argue: :mad2:

Good Luck and I hope it's simple!!:beer:

Marauderjack:burnout:

[JohnE]

Unless you have a bad set of aftermarket exhaust pipes, there is room to remove the pump assembly while the tank is in place. You only need to make sure the level is below the plate first. Just takes some careful angles when removing the assembly.

[Marauderjack]

SURE wish I'd known this a year or so ago!!!!!:argue: :mad2:

[Zack]

SURE wish I'd known this a year or so ago!!!!!:argue: :mad2:

Ive been trying to tell everyone for over 3 years now.

[magindat]

Read this

http://www.mercurymarauder.net/forums/showthread.php?t=27632

These are terrific instructions and I participated int his install. PM me if you have any questions at all and I'll provide my phone number.

[magindat]

Ive been trying to tell everyone for over 3 years now.

Yep, we did Juno's GT pump w/o dropping the tank.

[magindat]

Reinhart can getcha the GT pump, also.

[ggt4]

I swapped the pump....still nothing. I hooked the predator up and it says the fuel pressure is 90 psi and the FPF(fuel pump out fault detected) goes back and fourth from no to yes with the ignition on.

FPF (NO/YES) FUEL PUMP OUT FAULT DETECTED
168C: FRP (psi) FUEL RAIL PRES SENS

[merc]

I swapped the pump....still nothing. I hooked the predator up and it says the fuel pressure is 90 psi and the FPF(fuel pump out fault detected) goes back and fourth from no to yes with the ignition on.

FPF (NO/YES) FUEL PUMP OUT FAULT DETECTED
168C: FRP (psi) FUEL RAIL PRES SENS

Fuel Pump Relay Driver Circuit Failure

The question becomes who installed the pump ?

[wchain]

I swapped the pump....still nothing. I hooked the predator up and it says the fuel pressure is 90 psi and the FPF(fuel pump out fault detected) goes back and fourth from no to yes with the ignition on.

FPF (NO/YES) FUEL PUMP OUT FAULT DETECTED
168C: FRP (psi) FUEL RAIL PRES SENS

I tried to call you back but your phone was off.

Check your wiring to the inertia switch and the relay as well.

[ggt4]

Ok...Its up and running.....I was getting fuel to the engine but there was no spark. I checked the spark plugs on the pass side one was loose and the engine started up.......The dealership that my car was towed to in the beggining must have loosened it when I declined to let them install a fuel pump for $800. They will be hearing from me monday. My last question is that I am getting a trouble code for the fuel pressure beiing too high...on the predator it shows a reading of 90 psi when the car is running or off... is there a fuel pressure sensor that may have gone bad?

[HwyCruiser]

Gill, good to hear you're making progress.

Take a look at your fuel pump duty cycle (FP) and if there is a fuel pump monitor fault detected (FPF) under the gas fuel category on the Predator. With the key on the FP should be 75% after the pump primes - this is the PCM telling the driver to turn the pump off. After you start the car the FP should start reading between 0 and 50% to control the fuel rail pressure. The fuel pump monitor duty cycle (FPM) will cycle between YES and NO once a second. This is normal. If the FPF shows YES then there is a fuel pump driver fault.

I started my car and here's what mine reads:

fuel pump duty cycle (FP) = 12-13%
fuel pump monitor fault (FPF) = NO
fuel rail pressure (FRP) = 39-42 psi

Just out of curiosity, were you running an aftermarket tune before you installed the supercharger?

[HwyCruiser]

I looked up possible causes for the P0193 FRP sensor circuit high input and it lists these possible causes:

- FRP signal shorted to VREF or VPWR.
- FRP signal open (gasoline only).
- Damaged FRP sensor.
- Damaged PCM.

I'd double check the connector on the FRP sensor to make sure it's on good. Also check the wire bundle for cuts - the bundle at the firewall above the driver's side head is known to get cut up from resting on the bracket. You could also put the stock tune back in and see what the fuel rail pressure reads. Good luck!

[ggt4]

So I just checked some readings from the predator.
FP=27%
FPF=no
FRP=90 psi

These readings are with the car running. It's running a little rough too.

I did have a diablo sport chip before the supercharger install


Gill, good to hear you're making progress.

Take a look at your fuel pump duty cycle (FP) and if there is a fuel pump monitor fault detected (FPF) under the gas fuel category on the Predator. With the key on the FP should be 75% after the pump primes - this is the PCM telling the driver to turn the pump off. After you start the car the FP should start reading between 0 and 50% to control the fuel rail pressure. The fuel pump monitor duty cycle (FPM) will cycle between YES and NO once a second. This is normal. If the FPF shows YES then there is a fuel pump driver fault.

I started my car and here's what mine reads:

fuel pump duty cycle (FP) = 12-13%
fuel pump monitor fault (FPF) = NO
fuel rail pressure (FRP) = 39-42 psi

Just out of curiosity, were you running an aftermarket tune before you installed the supercharger?

[HwyCruiser]

So I just checked some readings from the predator.
FP=27%
FPF=no
FRP=90 psi

These readings are with the car running. It's running a little rough too.

I did have a diablo sport chip before the supercharger install

The feedback singal from fuel pump driver module to the PCM is showing that the driver is ok. I assume you pulled out the old Diablo chip before you flashed the custom s/c tune with the Predator.

What does the fuel rail pressure say if you relieve the fuel pressure by depressing the schrader valve? If it still reads 90 psi without any fuel in the rails then it points to an open signal to the FRP sensor or the sensor is bad. Check that electrical connector on the FRP sensor really good. Take the connector off, check the pins and plug it back in. Maybe the sensor got damaged when the injectors were swapped. :dunno:

If you have a backup of your custom tune, I'd try returning the car to stock and see what the fuel pressure does to eliminate the tune from the equation. Give me a call if you need any help.

[ggt4]

The feedback singal from fuel pump driver module to the PCM is showing that the driver is ok. I assume you pulled out the old Diablo chip before you flashed the custom s/c tune with the Predator.

What does the fuel rail pressure say if you relieve the fuel pressure by depressing the schrader valve? If it still reads 90 psi without any fuel in the rails then it points to an open signal to the FRP sensor or the sensor is bad. Check that electrical connector on the FRP sensor really good. Take the connector off, check the pins and plug it back in. Maybe the sensor got damaged when the injectors were swapped. :dunno:

If you have a backup of your custom tune, I'd try returning the car to stock and see what the fuel pressure does to eliminate the tune from the equation. Give me a call if you need any help.

I pulled the chip before loading the custom tune. My fuel pressure reads 90psi at all times even when I depress the valve which leads me to believe my problem is there. I will check that sensor when I get off work in a few hours. Just to be sure are you referring to the sensor at the throttle body?

[HwyCruiser]

The fuel rail pressure sensor is bolted onto the top of passenger side fuel rail. It has a manifold vacuum port on the side of it and a 3-pin connector on the top. See attached pic.

I'd bet a quarter that the connector wasn't plugged back in or isn't seated all the way when the injectors were swapped out. I hope it's that easy.

[ggt4]

JD, your a life saver. It was the FRP sensor. Now im getting readings nearly identical to the ones you posted. Thanks a lot :D



The feedback singal from fuel pump driver module to the PCM is showing that the driver is ok. I assume you pulled out the old Diablo chip before you flashed the custom s/c tune with the Predator.

What does the fuel rail pressure say if you relieve the fuel pressure by depressing the schrader valve? If it still reads 90 psi without any fuel in the rails then it points to an open signal to the FRP sensor or the sensor is bad. Check that electrical connector on the FRP sensor really good. Take the connector off, check the pins and plug it back in. Maybe the sensor got damaged when the injectors were swapped. :dunno:

If you have a backup of your custom tune, I'd try returning the car to stock and see what the fuel pressure does to eliminate the tune from the equation. Give me a call if you need any help.

[HwyCruiser]

JD, your a life saver. It was the FRP sensor. Now im getting readings nearly identical to the ones you posted. Thanks a lot :D

That's awesome! Now go out and enjoy that bad boy! :banana2:

[JMan]

The fuel rail pressure sensor (FRP) is located on the fuel rail on the pass' side. It has a little vacuum hose to it as well. It tells the PCM the pressure of the fuel rail so it can report to the fuel pump module. The fuel pump module then modulates the signal to the pump (Pulse Width Modulated or PWM). There is a data parameter on your Predator showing the pump PWM signal in percent. It is under the Fuel Control group and is listed as FP. If the rail sensor is reporting 90psi, the pump percentage will be 0 (zero). This will result in no pump activity. Normal range for a running car is 10-50% and 0% with the key on engine off after the initial 2sec. prime. Normal FRP pressures on your tuner are 35-60psi (engine running) and will vary. If the sensor is faulty and reads high, the PCM will shut down the pump (obvious reasons).

It might pay to check the connection on the FRP and make sure the pins are not pushed out of the connector. I've never seen an FRP sensor fail electrically, but I'm sure they can! They do leak fuel to the vacuum hose due to a rupture of the internal rubber diaphragm. That is not a factor in your case, however! HTH

J

Edit: Whoops, better late than never! I guess I should read the whole thread thoroughly before posting! It's good info so I'll leave it up - JMan's Folly!

[Motorhead350]

Glad to hear all is well again.